subject:(Coordinadora Nacional de Ni os Ni as y Adolescentes Trabajadores CONNATS Paraguay )

1. Bazan, Luis Enrique. Children appropriating a new world of hope in Peru, Paraguay, and Haiti.

Degree: Doctor of Education (EdD), Leadership Studies, 2009, University of San Francisco

URL: https://repository.usfca.edu/diss/208

unavailable

Subjects/Keywords: Fédération des enfants ayant vécu dans la rue (FETJABEN) (Haiti); Generacion (Organization : Peru); Coordinadora Nacional de Niños Niñas y Adolescentes Trabajadores (CONNATS) (Paraguay); Identity (Psychology) in children; Street children; Social conditions; Education

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bazan, L. E. (2009). Children appropriating a new world of hope in Peru, Paraguay, and Haiti. (Thesis). University of San Francisco. Retrieved from https://repository.usfca.edu/diss/208

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bazan, Luis Enrique. “Children appropriating a new world of hope in Peru, Paraguay, and Haiti.” 2009. Thesis, University of San Francisco. Accessed December 09, 2019. https://repository.usfca.edu/diss/208.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bazan, Luis Enrique. “Children appropriating a new world of hope in Peru, Paraguay, and Haiti.” 2009. Web. 09 Dec 2019.

Vancouver:

Bazan LE. Children appropriating a new world of hope in Peru, Paraguay, and Haiti. [Internet] [Thesis]. University of San Francisco; 2009. [cited 2019 Dec 09]. Available from: https://repository.usfca.edu/diss/208.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bazan LE. Children appropriating a new world of hope in Peru, Paraguay, and Haiti. [Thesis]. University of San Francisco; 2009. Available from: https://repository.usfca.edu/diss/208

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Porto

2. Rosa, Diego Gabriel Gomes. Sistema robótico com controlo de força para operações de furação.

Degree: 2013, Universidade do Porto

URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72535

Tese de Mestrado Integrado. Engenharia Mecânica. Faculdade de Engenharia. Universidade do Porto. 2013 Advisors/Committee Members: Abreu, Paulo Augusto Ferreira de, Lopes, António Manuel Ferreira Mendes, Universidade do Porto. Faculdade de Engenharia.

Subjects/Keywords: ni

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rosa, D. G. G. (2013). Sistema robótico com controlo de força para operações de furação. (Thesis). Universidade do Porto. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rosa, Diego Gabriel Gomes. “Sistema robótico com controlo de força para operações de furação.” 2013. Thesis, Universidade do Porto. Accessed December 09, 2019. http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rosa, Diego Gabriel Gomes. “Sistema robótico com controlo de força para operações de furação.” 2013. Web. 09 Dec 2019.

Vancouver:

Rosa DGG. Sistema robótico com controlo de força para operações de furação. [Internet] [Thesis]. Universidade do Porto; 2013. [cited 2019 Dec 09]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rosa DGG. Sistema robótico com controlo de força para operações de furação. [Thesis]. Universidade do Porto; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Porto

3. Silva, Carlos Miguel Ferreira e. O tempo de reverberação e a inteligibilidade da palavra : caso de estudo: salas de aula da FEUP.

Degree: 2013, Universidade do Porto

URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72582

Tese de Mestrado Integrado. Engenharia Civil - Especialização em Construções. Faculdade de Engenharia. Universidade do Porto. 2013 Advisors/Committee Members: Carvalho, António Pedro Oliveira de, Universidade do Porto. Faculdade de Engenharia.

Subjects/Keywords: ni

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APA (6^th Edition):

Silva, C. M. F. e. (2013). O tempo de reverberação e a inteligibilidade da palavra : caso de estudo: salas de aula da FEUP. (Thesis). Universidade do Porto. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72582

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Silva, Carlos Miguel Ferreira e. “O tempo de reverberação e a inteligibilidade da palavra : caso de estudo: salas de aula da FEUP.” 2013. Thesis, Universidade do Porto. Accessed December 09, 2019. http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72582.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Silva, Carlos Miguel Ferreira e. “O tempo de reverberação e a inteligibilidade da palavra : caso de estudo: salas de aula da FEUP.” 2013. Web. 09 Dec 2019.

Vancouver:

Silva CMFe. O tempo de reverberação e a inteligibilidade da palavra : caso de estudo: salas de aula da FEUP. [Internet] [Thesis]. Universidade do Porto; 2013. [cited 2019 Dec 09]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72582.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Silva CMFe. O tempo de reverberação e a inteligibilidade da palavra : caso de estudo: salas de aula da FEUP. [Thesis]. Universidade do Porto; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72582

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Porto

4. Dias, Carlos Miguel Teixeira. Projeto e desenvolvimento de um automóvel híbrido.

Degree: 2013, Universidade do Porto

URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72796

Tese de Mestrado integrado. Engenharia Mecânica. Faculdade de Engenharia. Universidade do Porto. 2013 Advisors/Committee Members: Duarte, José Manuel Ferreira, Araújo, Armando Luís Sousa, Universidade do Porto. Faculdade de Engenharia.

Subjects/Keywords: ni

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dias, C. M. T. (2013). Projeto e desenvolvimento de um automóvel híbrido. (Thesis). Universidade do Porto. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72796

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dias, Carlos Miguel Teixeira. “Projeto e desenvolvimento de um automóvel híbrido.” 2013. Thesis, Universidade do Porto. Accessed December 09, 2019. http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72796.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dias, Carlos Miguel Teixeira. “Projeto e desenvolvimento de um automóvel híbrido.” 2013. Web. 09 Dec 2019.

Vancouver:

Dias CMT. Projeto e desenvolvimento de um automóvel híbrido. [Internet] [Thesis]. Universidade do Porto; 2013. [cited 2019 Dec 09]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72796.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dias CMT. Projeto e desenvolvimento de um automóvel híbrido. [Thesis]. Universidade do Porto; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72796

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidad de Chile

5. Canales Mena, Martín Enrique. Capacidades de la Coordinadora Nacional de Procuramiento y Trasplante para garantizar el acceso a un órgano .

Degree: 2018, Universidad de Chile

URL: http://repositorio.uchile.cl/handle/2250/152129

► La donación y el trasplante de órganos representan la mejor solución a un problema de salud pública: el aumento sostenido de algunas enfermedades crónicas no… (more)

Subjects/Keywords: Coordinadora nacional de procuramiento y transplante de órganos (Chile); Trasplante; Políticas públicas - Chile; Donaciones de órganos, tejidos, etc

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Canales Mena, M. E. (2018). Capacidades de la Coordinadora Nacional de Procuramiento y Trasplante para garantizar el acceso a un órgano . (Thesis). Universidad de Chile. Retrieved from http://repositorio.uchile.cl/handle/2250/152129

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Canales Mena, Martín Enrique. “Capacidades de la Coordinadora Nacional de Procuramiento y Trasplante para garantizar el acceso a un órgano .” 2018. Thesis, Universidad de Chile. Accessed December 09, 2019. http://repositorio.uchile.cl/handle/2250/152129.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Canales Mena, Martín Enrique. “Capacidades de la Coordinadora Nacional de Procuramiento y Trasplante para garantizar el acceso a un órgano .” 2018. Web. 09 Dec 2019.

Vancouver:

Canales Mena ME. Capacidades de la Coordinadora Nacional de Procuramiento y Trasplante para garantizar el acceso a un órgano . [Internet] [Thesis]. Universidad de Chile; 2018. [cited 2019 Dec 09]. Available from: http://repositorio.uchile.cl/handle/2250/152129.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Canales Mena ME. Capacidades de la Coordinadora Nacional de Procuramiento y Trasplante para garantizar el acceso a un órgano . [Thesis]. Universidad de Chile; 2018. Available from: http://repositorio.uchile.cl/handle/2250/152129

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

6. Freitas, Francisco Henrique Cappi de. Avaliação das relações de fases do sistema ternário Ni-Nb-Ta na região rica em Ni.

Degree: Mestrado, Materiais Metálicos, Cerâmicos e Poliméricos, 2011, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/97/97134/tde-22082013-170741/ ;

►

O presente trabalho está relacionado a estudos de superligas à base de Ni, cujas microestruturas multifásicas apresentam propriedades satisfatórias para aplicações em altas temperaturas. O… (more)

▼

O presente trabalho está relacionado a estudos de superligas à base de Ni, cujas microestruturas multifásicas apresentam propriedades satisfatórias para aplicações em altas temperaturas. O Nb e o Ta são componentes importantes nesta classe de materiais, estando normalmente associados às fases endurecedoras ?é \'\'. Desta forma, a determinação das relações de fases no sistema Ni-Nb-Ta na região rica em Ni corresponde a uma importante contribuição para a literatura referente, especialmente para os trabalhos ligados à construção de base de dados termodinâmicos. Assim, foi definido como objetivo principal a proposição das relações de fases na região rica em Ni do sistema Ni-Nb-Ta para a temperatura de 1050 °C. As ligas foram obtidas por fusão a arco e tradas termicamente a 1050ºC por no mínimo 120 h. Amostras no estado bruto de fusão e tratadas termicamente foram caracterizadas microestruturalmente (MEV e DRX) e por microanálise química (EDS). Na região de estudo, observou-se as fases Niss, Ni8Ta, Ni3(Nb,Ta), Ni2(Nb,Ta), e ? (NiTa; Ni6Nb7), sem a presença de qualquer fase ternária. Observou-se uma solubilidade completa de Nb e Ta nas fases Ni3(Nb,Ta) e ?. A fase Ni2Ta apresentou uma solubilidade de Nb próxima de 13% at. Não foi possível determinar a região de solubilidade de Nb na fase Ni8Ta.

This work is related to studies of Ni-based superalloys, which multiphase microstructures have satisfactory properties for high temperature applications. The Nb and Ta are important components in this class of materials and is typically associated with the hardening phases ? ánd .\'T́hus, the determination of phase relationships in the system Ni-Nb-Ta in the Ni-rich region represents an important contribution to the literature, especially for determination of related thermodynamic data. Thus, the main objective of this work was to propose the phase relationships in the Ni-rich region of the system Ni-Nb-Ta at 1050 °C. The alloys were obtained by arc melting and heat-treated at 1050 º C for at least 120 h. Samples in the a-scast and heat treated states were characterized via (SEM and XRD) and chemical microanalysis (EDS). In the region of study, the observed phases were Niss, Ni8Ta, Ni3(Nb, Ta), Ni2(Nb,Ta), and ? (NiTa; Ni6Nb7) without the presence of any ternary phase. There was a complete solubility of Nb and Ta in the Ni3(Nb,Ta) and ? phases. The Ni2Ta showed a solubility of Nb close to 13% at. It was not possible to determine the region of solubility of Nb in the Ni8Ta phase.

Advisors/Committee Members: Nunes, Carlos Angelo.

Subjects/Keywords: Diagrama de fases; Ni-Nb System; Ni-Nb-Ta System; Ni-Ta System; Phase diagram; Sistema Ni-Nb; Sistema Ni-Nb-Ta; Sistema Ni-Ta

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Freitas, F. H. C. d. (2011). Avaliação das relações de fases do sistema ternário Ni-Nb-Ta na região rica em Ni. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/97/97134/tde-22082013-170741/ ;

Chicago Manual of Style (16^th Edition):

Freitas, Francisco Henrique Cappi de. “Avaliação das relações de fases do sistema ternário Ni-Nb-Ta na região rica em Ni.” 2011. Masters Thesis, University of São Paulo. Accessed December 09, 2019. http://www.teses.usp.br/teses/disponiveis/97/97134/tde-22082013-170741/ ;.

MLA Handbook (7^th Edition):

Freitas, Francisco Henrique Cappi de. “Avaliação das relações de fases do sistema ternário Ni-Nb-Ta na região rica em Ni.” 2011. Web. 09 Dec 2019.

Vancouver:

Freitas FHCd. Avaliação das relações de fases do sistema ternário Ni-Nb-Ta na região rica em Ni. [Internet] [Masters thesis]. University of São Paulo; 2011. [cited 2019 Dec 09]. Available from: http://www.teses.usp.br/teses/disponiveis/97/97134/tde-22082013-170741/ ;.

Council of Science Editors:

Freitas FHCd. Avaliação das relações de fases do sistema ternário Ni-Nb-Ta na região rica em Ni. [Masters Thesis]. University of São Paulo; 2011. Available from: http://www.teses.usp.br/teses/disponiveis/97/97134/tde-22082013-170741/ ;

7. Alayza Mujica, Ernesto. La democracia y las organizaciones de derechos humanos en el Perú : La Coordinadora Nacional de Derechos Humanos en el período 1997-2001.

Degree: 2010, Pontificia Universidad Católica del Perú

URL: http://tesis.pucp.edu.pe/repositorio/handle/123456789/1730

►

Pareció importante y motivador estudiar los documentos y analizar la actuación de la Coordinadora Nacional de Derechos Humanos, en el proceso de cierre del período… (more)

Subjects/Keywords: Coordinadora Nacional de Derechos Humanos (Perú); Democracia – Perú; Derechos humanos – Perú.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alayza Mujica, E. (2010). La democracia y las organizaciones de derechos humanos en el Perú : La Coordinadora Nacional de Derechos Humanos en el período 1997-2001. (Masters Thesis). Pontificia Universidad Católica del Perú. Retrieved from http://tesis.pucp.edu.pe/repositorio/handle/123456789/1730

Chicago Manual of Style (16^th Edition):

Alayza Mujica, Ernesto. “La democracia y las organizaciones de derechos humanos en el Perú : La Coordinadora Nacional de Derechos Humanos en el período 1997-2001.” 2010. Masters Thesis, Pontificia Universidad Católica del Perú. Accessed December 09, 2019. http://tesis.pucp.edu.pe/repositorio/handle/123456789/1730.

MLA Handbook (7^th Edition):

Alayza Mujica, Ernesto. “La democracia y las organizaciones de derechos humanos en el Perú : La Coordinadora Nacional de Derechos Humanos en el período 1997-2001.” 2010. Web. 09 Dec 2019.

Vancouver:

Alayza Mujica E. La democracia y las organizaciones de derechos humanos en el Perú : La Coordinadora Nacional de Derechos Humanos en el período 1997-2001. [Internet] [Masters thesis]. Pontificia Universidad Católica del Perú 2010. [cited 2019 Dec 09]. Available from: http://tesis.pucp.edu.pe/repositorio/handle/123456789/1730.

Council of Science Editors:

Alayza Mujica E. La democracia y las organizaciones de derechos humanos en el Perú : La Coordinadora Nacional de Derechos Humanos en el período 1997-2001. [Masters Thesis]. Pontificia Universidad Católica del Perú 2010. Available from: http://tesis.pucp.edu.pe/repositorio/handle/123456789/1730

Universitat Rovira i Virgili

8. Zárate Sáez, Cayetana. C-heteroatom bond-formation via ni-catalyzed c-o bond cleavage.

Degree: Departament de Química Analítica i Química Orgànica, 2017, Universitat Rovira i Virgili

URL: http://hdl.handle.net/10803/401555

► While the field of cross-coupling has reached remarkable levels of sophistication, the vast majority of processes are still being conducted with organic halide counterparts. Drawbacks… (more)

Subjects/Keywords: Derivats del fenol; Catàlisi de Ni; Sililaciò y Borilaciò; Derivados del fenol; Sililación y borilación; Phenol derivatives; Ni catalysis; Silylation and borylation; Ciències; 547

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zárate Sáez, C. (2017). C-heteroatom bond-formation via ni-catalyzed c-o bond cleavage. (Thesis). Universitat Rovira i Virgili. Retrieved from http://hdl.handle.net/10803/401555

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zárate Sáez, Cayetana. “C-heteroatom bond-formation via ni-catalyzed c-o bond cleavage.” 2017. Thesis, Universitat Rovira i Virgili. Accessed December 09, 2019. http://hdl.handle.net/10803/401555.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zárate Sáez, Cayetana. “C-heteroatom bond-formation via ni-catalyzed c-o bond cleavage.” 2017. Web. 09 Dec 2019.

Vancouver:

Zárate Sáez C. C-heteroatom bond-formation via ni-catalyzed c-o bond cleavage. [Internet] [Thesis]. Universitat Rovira i Virgili; 2017. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/10803/401555.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zárate Sáez C. C-heteroatom bond-formation via ni-catalyzed c-o bond cleavage. [Thesis]. Universitat Rovira i Virgili; 2017. Available from: http://hdl.handle.net/10803/401555

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Rio Grande do Norte

9. Resende, Hudson da Silva. Desenvolvimento de software na plataforma NI-LabView para reconhecimento e identificação automática de parâmetros de controle de aerogeradores utilizando dados operacionais .

Degree: 2016, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/21530

► Currently, in Brazil and worldwide deployment of central power generation from wind power grows exponentially, however, there is the difficulty in obtaining specific to simulation… (more)

Subjects/Keywords: SIPAR; NI-LabVIEW®; Identificação de parâmetros; Aerogeradores

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Resende, H. d. S. (2016). Desenvolvimento de software na plataforma NI-LabView para reconhecimento e identificação automática de parâmetros de controle de aerogeradores utilizando dados operacionais . (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/21530

Chicago Manual of Style (16^th Edition):

Resende, Hudson da Silva. “Desenvolvimento de software na plataforma NI-LabView para reconhecimento e identificação automática de parâmetros de controle de aerogeradores utilizando dados operacionais .” 2016. Masters Thesis, Universidade do Rio Grande do Norte. Accessed December 09, 2019. http://repositorio.ufrn.br/handle/123456789/21530.

MLA Handbook (7^th Edition):

Resende, Hudson da Silva. “Desenvolvimento de software na plataforma NI-LabView para reconhecimento e identificação automática de parâmetros de controle de aerogeradores utilizando dados operacionais .” 2016. Web. 09 Dec 2019.

Vancouver:

Resende HdS. Desenvolvimento de software na plataforma NI-LabView para reconhecimento e identificação automática de parâmetros de controle de aerogeradores utilizando dados operacionais . [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2016. [cited 2019 Dec 09]. Available from: http://repositorio.ufrn.br/handle/123456789/21530.

Council of Science Editors:

Resende HdS. Desenvolvimento de software na plataforma NI-LabView para reconhecimento e identificação automática de parâmetros de controle de aerogeradores utilizando dados operacionais . [Masters Thesis]. Universidade do Rio Grande do Norte; 2016. Available from: http://repositorio.ufrn.br/handle/123456789/21530

Universidade do Porto

10. Monteiro, Paulo Miguel Pereira Duarte. Classificação da informação na indústria da construção : perspectivas e percursos.

Degree: 1998, Universidade do Porto

URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72702

Tese de Mestrado. Construção de Edifícios. Faculdade de Engenharia. Universidade do Porto. 1998 Advisors/Committee Members: Soeiro, Alfredo Augusto Vieira, Universidade do Porto. Faculdade de Engenharia.

Subjects/Keywords: ni

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Monteiro, P. M. P. D. (1998). Classificação da informação na indústria da construção : perspectivas e percursos. (Thesis). Universidade do Porto. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72702

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Monteiro, Paulo Miguel Pereira Duarte. “Classificação da informação na indústria da construção : perspectivas e percursos.” 1998. Thesis, Universidade do Porto. Accessed December 09, 2019. http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72702.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Monteiro, Paulo Miguel Pereira Duarte. “Classificação da informação na indústria da construção : perspectivas e percursos.” 1998. Web. 09 Dec 2019.

Vancouver:

Monteiro PMPD. Classificação da informação na indústria da construção : perspectivas e percursos. [Internet] [Thesis]. Universidade do Porto; 1998. [cited 2019 Dec 09]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72702.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Monteiro PMPD. Classificação da informação na indústria da construção : perspectivas e percursos. [Thesis]. Universidade do Porto; 1998. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio-aberto.up.pt:10216/72702

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

11. Varavallo, Rogério. Avaliação da resistência à fadiga em alta temperatura da superliga MAR-M247(Nb).

Degree: Mestrado, Materiais, 2012, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/18/18150/tde-17072012-111457/ ;

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Este projeto faz parte de uma Rede Interdisciplinar de Pesquisa em Superligas no Brasil (Projeto Pró-Engenharias - CAPES), que tem como objetivo o desenvolvimento técnico… (more)

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Este projeto faz parte de uma Rede Interdisciplinar de Pesquisa em Superligas no Brasil (Projeto Pró-Engenharias - CAPES), que tem como objetivo o desenvolvimento técnico e científico do Brasil nesta classe de materiais. A rede é composta por especialistas de estabelecida competência em assuntos fundamentais para o desenvolvimento de materiais estruturais, tais como: fusão em vácuo, solidificação direcional, relações orientação-propriedade, tratamentos térmicos, fluência, fadiga em alta temperatura, oxidação e corrosão a quente. Assim, na parte que compete a este pesquisador, foram estudadas as propriedades de fadiga em altas temperaturas da liga MAR-M247 e de uma nova liga, a liga MAR-M247 modificada pela substituição do Ta pelo Nb, e sendo doravante denominada MAR-M247(Nb). Foram desenvolvidos estudos correlacionando parâmetros intrínsecos do material, como composição química e microestrutura adicionalmente a parâmetros extrínsecos, tais como: temperatura, estudo de oxidação, propriedades de fadiga, ensaios de tração em temperatura ambiente, 250, 500, 700, 800, 900 e 1000ºC, conforme as normas AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) E 8M-00 e ASTM E 21-00. Em relação aos ensaios de fadiga foram realizados ensaios de nucleação de trincas , conforme a norma ASTM E466-07 e os resultados foram apresentados na forma de curvas S-N e analisados estatisticamente segunda a norma ASTM E739-10. Para auxiliar na definição dos micromecanismos de fadiga, as superfícies de fratura foram analisadas utilizando o microscópio eletrônico de varredura (MEV) e microscópio ótico estereoscópico (MO). Foi realizado ensaio de oxidação para verificar a susceptibilidade a oxidação das ligas, sendo este um dos fatores que afetam a vida em fadiga em alta temperatura.

This project is part of an interdisciplinary network of Research in Super League in Brazil (Project Pro-Engineering - CAPES), which aims to technical and scientific development of Brazil in this class of materials. The network is composed of experts of established competence in matters fundamental to the development of structural materials, such as: vacuum melting, directional solidification, relationships property-oriented, heat treatment, creep, fatigue in high temperature oxidation and hot corrosion. Thus, at the racing this researcher, were studied the fatigue properties at high temperatures MAR-M247 alloy and a new league, which in reality is the MAR-M247 alloy modified by replacing the Ta by Nb, and being hereinafter referred to as MAR-M247 (Nb). Were designed studies correlating parameters intrinsic material, such as chemical composition and microstructure, with extrinsic parameters such as: temperature and type of loading, with the properties fatigue. Thus, tensile tests at room temperature environment, 250, 500, 700 and 900ºC, and tests for compression at temperatures of 700 and 900ºC were performed to determine the elastic behavior and elastoplastic material, according to the ASTM E-8M 00, ASTM E 21-00 and ASTM E209-00. Were also conducted testing of fatigue…

Advisors/Committee Members: Ruchert, Cassius Olivio Figueiredo Terra.

Subjects/Keywords: Fatigue crack nucleation; Ni superalloys; Nucleação de trinca por fadiga; Oxidação; Oxidation; Superligas de Ni

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Varavallo, R. (2012). Avaliação da resistência à fadiga em alta temperatura da superliga MAR-M247(Nb). (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/18/18150/tde-17072012-111457/ ;

Chicago Manual of Style (16^th Edition):

Varavallo, Rogério. “Avaliação da resistência à fadiga em alta temperatura da superliga MAR-M247(Nb).” 2012. Masters Thesis, University of São Paulo. Accessed December 09, 2019. http://www.teses.usp.br/teses/disponiveis/18/18150/tde-17072012-111457/ ;.

MLA Handbook (7^th Edition):

Varavallo, Rogério. “Avaliação da resistência à fadiga em alta temperatura da superliga MAR-M247(Nb).” 2012. Web. 09 Dec 2019.

Vancouver:

Varavallo R. Avaliação da resistência à fadiga em alta temperatura da superliga MAR-M247(Nb). [Internet] [Masters thesis]. University of São Paulo; 2012. [cited 2019 Dec 09]. Available from: http://www.teses.usp.br/teses/disponiveis/18/18150/tde-17072012-111457/ ;.

Council of Science Editors:

Varavallo R. Avaliação da resistência à fadiga em alta temperatura da superliga MAR-M247(Nb). [Masters Thesis]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/18/18150/tde-17072012-111457/ ;

12. Silva, Charles da Rocha. Estudo das interações magnéticas em nanofios de Ni obtidos por eletrodeposição AC.

Degree: Mestrado, Física, 2007, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-29022008-105215/ ;

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Foram feitos estudos das propriedades magnéticas e estruturais em nanofios de níquel em uma lâmina de alumínio. As amostras foram obtidas através da anodização em… (more)

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Foram feitos estudos das propriedades magnéticas e estruturais em nanofios de níquel em uma lâmina de alumínio. As amostras foram obtidas através da anodização em duas etapas, seguida de uma eletrodeposição AC. Foi verificado que o aumento do potencial usado nas anodizações acarretam em um aumento do tamanho dos grãos cristalinos de níquel e dos diâmetros dos nanofios. O tamanho dos grãos de níquel e dos diâmetros dos nanofios variaram, respectivamente, entre 10 a 20 nm e 30 a 50 nm. As amostras apresentam alta anisotropia de forma, com coercividade entre 565 a 725 Oe. As interações magnéticas foram estudadas através das curvas `delta´M, estas mostraram que as interações desmagnetizantes são dominantes nestes sistemas. O modelo de Stoner-Wohlfarth, acréscido de um termo de interação foi utilizado para simular e interpretar o comportamento magnético dos nanofios. Através dos resultados numéricos e experimentais foi verificado que a componente reversível (Mrev) da magnetização independe do estado inicial do sistema, diferentemente do comportamento para a componente irreversível (Mirr). Através da análise das curvas de Mrev(Mirr)Hi , provenientes dos resultados numéricos e experimentais, foi verificado que existe um forte indicativo quanto ao modo de inversão da magnetização por curling, para nanofios

Studies of magnetic and structural properties of nickel nanowires deposited on nanoporous alumina membranes were carried out. The samples were obtained by a two-step anodization, followed by an AC electrodeposition. It was noted that the diameters of the nanowires and the crystalline grain size of the deposited nickel increase with the anodization voltage. The mean diameters and the grain sizes varied from 10 to 20 nm and from 30 to 50 nm, respectively. The samples exhibited a strong shape anisotropy, with coercivities between 565 and 725 Oe. Magnetic interactions were studied via `delta´M curves, which showed that the dominant interactions are rather demagnetizing in these systems. An interacting Stoner-Wohlfarth model was developed to simulate and reproduce the magnetic behavior of the nanowires. From the comparison between numerical and experimental results (which exhibit excellent agreement), it was noted that reversible components of magnetization (Mrev) do not depend on the initial state of the system, whereas irreversible components (Mirr) do. From the analysis of Mrev(Mirr)Hi curves of numerical and experimental results, it was noted that there is strong evidence for the curling magnetization reversal mode for these systems

Advisors/Committee Members: Cornejo, Daniel Reinaldo.

Subjects/Keywords: Interações magnéticas; Inversão de magnetização; Magnetic interactions; Magnetization reversol; Nanofios de Ni; Nanowire of Ni

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APA (6^th Edition):

Silva, C. d. R. (2007). Estudo das interações magnéticas em nanofios de Ni obtidos por eletrodeposição AC. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/43/43134/tde-29022008-105215/ ;

Chicago Manual of Style (16^th Edition):

Silva, Charles da Rocha. “Estudo das interações magnéticas em nanofios de Ni obtidos por eletrodeposição AC.” 2007. Masters Thesis, University of São Paulo. Accessed December 09, 2019. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-29022008-105215/ ;.

MLA Handbook (7^th Edition):

Silva, Charles da Rocha. “Estudo das interações magnéticas em nanofios de Ni obtidos por eletrodeposição AC.” 2007. Web. 09 Dec 2019.

Vancouver:

Silva CdR. Estudo das interações magnéticas em nanofios de Ni obtidos por eletrodeposição AC. [Internet] [Masters thesis]. University of São Paulo; 2007. [cited 2019 Dec 09]. Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-29022008-105215/ ;.

Council of Science Editors:

Silva CdR. Estudo das interações magnéticas em nanofios de Ni obtidos por eletrodeposição AC. [Masters Thesis]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/43/43134/tde-29022008-105215/ ;

13. Casini, Julio César Serafim. Hidrogenação de ligas à base de terras raras para fabricação de eletrodos negativos de baterias de níquel-hidreto metálico.

Degree: Mestrado, Tecnologia Nuclear - Materiais, 2011, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-01062011-144128/ ;

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Neste trabalho foi estudado as ligas La0,7-xMgx Pr0,3Al0,3Mn0,4Co0,5Ni3,8 (x = 0 a 0,7) como eletrodo negativo de baterias de níquel - hidreto metálico. A hidrogenação… (more)

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Neste trabalho foi estudado as ligas La0,7-xMgx Pr0,3Al0,3Mn0,4Co0,5Ni3,8 (x = 0 a 0,7) como eletrodo negativo de baterias de níquel - hidreto metálico. A hidrogenação das ligas foi realizada com duas pressões de H2 (2 bar e 10 bar) e temperaturas (ambiente e 500°C). A capacidade de descarga das ba terias de níquel hidreto metálico foram analisadas pelo equipamento de testes elétricos ARBIN BT-4. As ligas, no estado bruto de fusão, foram analisadas por microscopia eletrônica de varredura (MEV), espectroscopia de energia dispersiva (EDS) e difração de Raios-X. Com o aumento da concentração de Mg nas ligas aumenta-se a capacidade de descarga, porém nota-se a diminuição a estabilidade cíclica das baterias. A capacidade de descarga máxima obtida foi para a liga Mg0,7Pr0,3Al0,3Mn0,4Co0,5Ni3,8 (60 mAh) e a bateria que apresentou a melhor performance foi La0,4Mg0,3Pr0,3Al0,3Mn0,4Co0,5Ni3,8 (53 mAh e 150 ciclos). A capacidade de absorção de hidrogênio diminui quando se adiciona Mg, não ocorrendo tal efeito para a liga Mg0,7Pr0,3Al0,3Mn0,4Co0,5Ni3,8.

In this work were studied of La0.7-xMgx Pr0.3Al0.3Mn0.4Co0.5Ni3.8 (x = 0 and 0.7) alloys for negative electrodes of the nickel-metal hydride batteries. The hydrogenation of the alloys was performed varying pressing of H2 (2 and 10 bar) and temperature (room and 500°C). The discharge capacity of the nic kel-metal hydride batteries were analyzed in ARBIN BT- 4 electrical test equipment. The as-cast alloys were analyzed by scanning electron microscopy (SEM), energy disperse spectroscopy (EDX) and X-Ray diffraction. The increasing Mg addition in the alloy increases maximum discharge capacity but decrease cycle life of the batteries. The maximum discharge capacity was obtained with the Mg0.7Pr0.3Al0.3Mn0.4Co0.5Ni3.8 alloy (60 mAh) and the battery which presented the best performance was La0.4Mg0.3Pr0.3Al0.3Mn0.4Co0.5Ni3.8 alloy (53 mAh and 150 cycles). The H2 capability of absorption was diminished for increased Mg addition and no such effect occurs for Mg0.7Pr0.3Al0.3Mn0.4Co0.5Ni3.8 alloy.

Advisors/Committee Members: Takiishi, Hidetoshi.

Subjects/Keywords: baterias Ni-HM; hidrogenação; hydrogenation; LaNi5; ligas de La-Mg-Ni; rare earth; terras raras

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Casini, J. C. S. (2011). Hidrogenação de ligas à base de terras raras para fabricação de eletrodos negativos de baterias de níquel-hidreto metálico. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/85/85134/tde-01062011-144128/ ;

Chicago Manual of Style (16^th Edition):

Casini, Julio César Serafim. “Hidrogenação de ligas à base de terras raras para fabricação de eletrodos negativos de baterias de níquel-hidreto metálico.” 2011. Masters Thesis, University of São Paulo. Accessed December 09, 2019. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-01062011-144128/ ;.

MLA Handbook (7^th Edition):

Casini, Julio César Serafim. “Hidrogenação de ligas à base de terras raras para fabricação de eletrodos negativos de baterias de níquel-hidreto metálico.” 2011. Web. 09 Dec 2019.

Vancouver:

Casini JCS. Hidrogenação de ligas à base de terras raras para fabricação de eletrodos negativos de baterias de níquel-hidreto metálico. [Internet] [Masters thesis]. University of São Paulo; 2011. [cited 2019 Dec 09]. Available from: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-01062011-144128/ ;.

Council of Science Editors:

Casini JCS. Hidrogenação de ligas à base de terras raras para fabricação de eletrodos negativos de baterias de níquel-hidreto metálico. [Masters Thesis]. University of São Paulo; 2011. Available from: http://www.teses.usp.br/teses/disponiveis/85/85134/tde-01062011-144128/ ;

Université de Grenoble

14. Crozet, Coraline. Equilibres de phases et microstructures d'alliages CU-FE-NI riches en FE : Design of a new iron-nickel-copper binder for diamond tools.

Degree: Docteur es, Génie civil, 2011, Université de Grenoble

URL: http://www.theses.fr/2011GRENI015

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Ce travail a pour but l’acquisition de connaissances fondamentales dans les équilibres de phases et les transformations de phases des alliages ternaires contenant du fer,… (more)

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Ce travail a pour but l’acquisition de connaissances fondamentales dans les équilibres de phases et les transformations de phases des alliages ternaires contenant du fer, du nickel et du cuivre.Cette étude est composée de trois parties : la première est consacrée aux équilibres de phase entre600°C et 1000°C dans le coin riche en fer du système ternaire Cu-Fe-Ni, la seconde concerne l’analyse des transformations de phases dans des alliages modèles suivant deux vitesses de refroidissement et la troisième étudie les alliages industriels.Cette approche expérimentale est appuyée par des calculs thermodynamiques. Une comparaison est effectuée avec les données issues de la littérature. Les sections isothermes à 600°C, 800°C et1000°C ont été reconfirmées. Les domaines triphasés αFe/γFe/γCu ont été déterminés à 600°C et800°C et semblent décalés vers de plus fortes teneurs en Ni. La lacune de miscibilité est moins étendue que celle calculée et ce particulièrement du côté du binaire Cu-Ni.Les transformations de phase γ→α apparaissant lors du refroidissement d’alliages Fe-xCu-10Ni et Fe-10Cu-xNi (0<x<15 % en masse) ont été étudiées. Elles sont observées dans tous les alliages refroidis lentement par dilatométrie sauf dans l’alliage binaire Fe-Cu. Les températures de transformation sont systématiquement inférieures aux températures d’équilibre et cet écart augmente lorsque les teneurs en Ni et Cu augmentent. La formation de la ferrite bainitique est favorisée par l’addition de Cu dans les alliages trempés Fe-xCu-10Ni et par l’addition de Ni dans les alliages Fe-10Cu-xNi tandis que la ferrite massive se forme préférentiellement lors du refroidissement lent. Une diminution des températures de transformation se produit lorsque la taille de grains est affinée et est reliée au processus d’accommodation plastique liée à la transformation.La composition et la vitesse de refroidissement jouent un rôle sur la dureté de ces alliages via la présence de Ni en solution solide ainsi que le nombre et la taille des précipités de Cu.

This work aims in getting fundamental knowledge of phase equilibria and microstructures of ternary alloys containing copper, nickel and iron. The thesis is composed of three parts: a first part is devoted to phase equilibria in the Fe-rich corner of the ternary Cu-Fe-Ni system between 600°C and 1000°C, a second part is devoted to the microstructures in these materials for model alloys, for two cooling rates and a third part is devoted to industrial alloys.Phase equilibria of the system are investigated in the range 600-1000°C using diffusion multiples in conjunction with selected equilibrated alloys. This experimental approach is supplemented by thermodynamic calculations. A comparison is drawn with data reported in the literature. The isothermal sections at 600°C, 800°C and 1000°C have been reconfirmed. The three-phase regions αFe/γFe/γCu are determined at 600°C and 800°C and appear shifted to a higher Ni content. The miscibility gap is narrower than the calculated, particularly on the Cu-Ni binary…

Advisors/Committee Members: Lay, Sabine (thesis director), Antoni-Zdziobek, Annie (thesis director).

Subjects/Keywords: Thermodynamique; Transformation de phase; Alliages Fe-Ni-Cu; Thermodynamic; Phase transformations; Fe-Ni-Cu alloys

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Crozet, C. (2011). Equilibres de phases et microstructures d'alliages CU-FE-NI riches en FE : Design of a new iron-nickel-copper binder for diamond tools. (Doctoral Dissertation). Université de Grenoble. Retrieved from http://www.theses.fr/2011GRENI015

Chicago Manual of Style (16^th Edition):

Crozet, Coraline. “Equilibres de phases et microstructures d'alliages CU-FE-NI riches en FE : Design of a new iron-nickel-copper binder for diamond tools.” 2011. Doctoral Dissertation, Université de Grenoble. Accessed December 09, 2019. http://www.theses.fr/2011GRENI015.

MLA Handbook (7^th Edition):

Crozet, Coraline. “Equilibres de phases et microstructures d'alliages CU-FE-NI riches en FE : Design of a new iron-nickel-copper binder for diamond tools.” 2011. Web. 09 Dec 2019.

Vancouver:

Crozet C. Equilibres de phases et microstructures d'alliages CU-FE-NI riches en FE : Design of a new iron-nickel-copper binder for diamond tools. [Internet] [Doctoral dissertation]. Université de Grenoble; 2011. [cited 2019 Dec 09]. Available from: http://www.theses.fr/2011GRENI015.

Council of Science Editors:

Crozet C. Equilibres de phases et microstructures d'alliages CU-FE-NI riches en FE : Design of a new iron-nickel-copper binder for diamond tools. [Doctoral Dissertation]. Université de Grenoble; 2011. Available from: http://www.theses.fr/2011GRENI015

15. Yaqoob, Khurram. Experimental determination and thermodynamic modelisation of Mo-Ni-Re system : Détermination expérimentale et modélisation thermodynamique du système Mo-Ni-Re.

Degree: Docteur es, Sciences des Matériaux, 2012, Université Paris-Est

URL: http://www.theses.fr/2012PEST1172

► E système Mo-Ni-Re est un sous-système majeur des superalliages à base de Ni conçus pour une utilisation dans les applications à haute température. Compte tenu… (more)

Subjects/Keywords: Mo-Ni-Re; Diagramme de phases; Modélisation thermodynamique; Mo-Ni-Re; Phase diagram; Thermodynamic modeling

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yaqoob, K. (2012). Experimental determination and thermodynamic modelisation of Mo-Ni-Re system : Détermination expérimentale et modélisation thermodynamique du système Mo-Ni-Re. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2012PEST1172

Chicago Manual of Style (16^th Edition):

Yaqoob, Khurram. “Experimental determination and thermodynamic modelisation of Mo-Ni-Re system : Détermination expérimentale et modélisation thermodynamique du système Mo-Ni-Re.” 2012. Doctoral Dissertation, Université Paris-Est. Accessed December 09, 2019. http://www.theses.fr/2012PEST1172.

MLA Handbook (7^th Edition):

Yaqoob, Khurram. “Experimental determination and thermodynamic modelisation of Mo-Ni-Re system : Détermination expérimentale et modélisation thermodynamique du système Mo-Ni-Re.” 2012. Web. 09 Dec 2019.

Vancouver:

Yaqoob K. Experimental determination and thermodynamic modelisation of Mo-Ni-Re system : Détermination expérimentale et modélisation thermodynamique du système Mo-Ni-Re. [Internet] [Doctoral dissertation]. Université Paris-Est; 2012. [cited 2019 Dec 09]. Available from: http://www.theses.fr/2012PEST1172.

Council of Science Editors:

Yaqoob K. Experimental determination and thermodynamic modelisation of Mo-Ni-Re system : Détermination expérimentale et modélisation thermodynamique du système Mo-Ni-Re. [Doctoral Dissertation]. Université Paris-Est; 2012. Available from: http://www.theses.fr/2012PEST1172

16. Zhang, Baicheng. Fusion sélective par laser - influence de l'atmosphère et réalisation d'alliage in situ : Selective laser melting - influence of atmosphere and realization of in-situ fonction alloy.

Degree: Docteur es, Mécanique, 2013, Belfort-Montbéliard

URL: http://www.theses.fr/2013BELF0198

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Au cours de la dernière décennie, le procédé de fabrication additive par fusion sélective d'un lit de poudre SLM a attiré une grande attention dans… (more)

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Au cours de la dernière décennie, le procédé de fabrication additive par fusion sélective d'un lit de poudre SLM a attiré une grande attention dans le domaine de l'industrie, car il permet de produire rapidement des pièces de formes complexes. Le but de ce travail est d'étendre les performances des procédés SLM en étudiant la possibilité d'élaborer des pièces en atmosphère raréfiée. Pour atteindre cet objectif, une approche théorique et expérimentale a été développée, avec la mise en place d'une machine de fusion sélective par laser capable de travailler dans le domaine de pression de 1 à 10-2 mbar.Le travail sous vide permet d'éviter la formation du "bouclier" de plasma généré à partir de l'atmosphère de gaz ionisé par l'énergie du laser. Ceci permet d'une part d'éviter la contamination chimique du matériau (oxydation, nitruration,...) au cours des processus de fusion et d'autre part de réduire le taux de porosité. L'effet des paramètres du laser et des variables d'environnement sur la qualité de pièces a été étudié en considérant le cas du fer pur, de l'acier Inox 316L et du titane.Par ailleurs nous avons étudié la possibilité d'obtenir des alliages in-situ au cours de la fabrication par la technique SLM à partir de mélanges de poudres.Des essais ont été conduits à partir de mélanges Mg/Al, Fe/Ni et Ti/Ni. Dans tous les cas nous avons pu obtenir des alliages in-situ pour les domaines de composition visés qui correspondent à des applications pratiques (structures légères, alliage magnétique à faible coercivité, alliage à mémoire de forme). Les propriétés des matériaux obtenus, d'après les premières caractérisations effectuées, se comparent de façon favorable par rapport aux techniques classiques d'élaboration et de mise en œuvre.

During the last decade, selective laser melting attracted attention in industry because it could allow producing parts with complex shapes rapidly and accurately. The aim of this work is to obtain parts with desired properties by SLM technology. To achieve this point, a theoretical and experimental approach was developed concerning a new process which carries out the selective laser melting process at pressures in the range 1 to 1×10-2 mbar.Vacuum operating under allows avoiding the plasma shield generated from the gas atmosphere ionized by the high laser energy, which on the one hand avoids the chemical contamination (oxidizing, nitriding…) during the melting process and on the other hand reduces the porosity rate. The effect of laser parameters and environment variables on the quality of parts was studied by considering the case of pure iron, stainless steel 316L and titanium.Moreover, we studied the possibility of obtaining in-situ alloys during the SLM manufacturing technique from mixtures of powders.Tests were conducted from mixtures Mg/Al, Fe/Ni and Ti/Ni. In all cases we were able to obtain in-situ alloys for areas covered composition corresponding to practical applications (lightweight structures, low coercivity magnetic alloy, shape memory alloy). The properties of material…

Advisors/Committee Members: Coddet, Christian (thesis director).

Subjects/Keywords: Fusion sélective par laser; Titane; SLM sous vide; Mélange de poudres; Mg-Al; Fe-Ni; Ti-Ni; SLM under vacuum; Mixed powder; Mg-Al; Fe-Ni; Ti-Ni

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhang, B. (2013). Fusion sélective par laser - influence de l'atmosphère et réalisation d'alliage in situ : Selective laser melting - influence of atmosphere and realization of in-situ fonction alloy. (Doctoral Dissertation). Belfort-Montbéliard. Retrieved from http://www.theses.fr/2013BELF0198

Chicago Manual of Style (16^th Edition):

Zhang, Baicheng. “Fusion sélective par laser - influence de l'atmosphère et réalisation d'alliage in situ : Selective laser melting - influence of atmosphere and realization of in-situ fonction alloy.” 2013. Doctoral Dissertation, Belfort-Montbéliard. Accessed December 09, 2019. http://www.theses.fr/2013BELF0198.

MLA Handbook (7^th Edition):

Zhang, Baicheng. “Fusion sélective par laser - influence de l'atmosphère et réalisation d'alliage in situ : Selective laser melting - influence of atmosphere and realization of in-situ fonction alloy.” 2013. Web. 09 Dec 2019.

Vancouver:

Zhang B. Fusion sélective par laser - influence de l'atmosphère et réalisation d'alliage in situ : Selective laser melting - influence of atmosphere and realization of in-situ fonction alloy. [Internet] [Doctoral dissertation]. Belfort-Montbéliard; 2013. [cited 2019 Dec 09]. Available from: http://www.theses.fr/2013BELF0198.

Council of Science Editors:

Zhang B. Fusion sélective par laser - influence de l'atmosphère et réalisation d'alliage in situ : Selective laser melting - influence of atmosphere and realization of in-situ fonction alloy. [Doctoral Dissertation]. Belfort-Montbéliard; 2013. Available from: http://www.theses.fr/2013BELF0198

17. López López, Juan Ramón. Recubrimientos monocapa y multicapas funcionales, a base de níquel, elaborados por técnicas de electrodepósito y de depósito químico dinámico (DCP) : Revêtements monocouche et multicouches fonctionnelles à base de nickel, élaborés par des techniques électrochimiques et dépôt chimique dynamique (DCP).

Degree: Docteur es, Génie des matériaux, 2013, Ecully, Ecole centrale de Lyon; Centro de Investigación y Desarrollo Tecnológico en Electroquímica

URL: http://www.theses.fr/2013ECDL0028

►

Dans ce travail de thèse on étudie le développement de revêtements monocouches (simple couche) et multicouches à base de nickel en utilisant des techniques humides… (more)

▼

Dans ce travail de thèse on étudie le développement de revêtements monocouches (simple couche) et multicouches à base de nickel en utilisant des techniques humides (électrodéposition et dépôt chimique dynamique). L'objectif principal est d'obtenir un revêtement d'une dureté élevée (supérieure à 500 HV) et une bonne résistance à la corrosion (plus de 500 heures en brouillard salin), sur la base des exigences de l'industrie aéronautique, principalement le groupe SAFRAN. Dans la première partie nous présentons le développement de revêtements de Ni par la technique d'électrodéposition. À partir d’un bain électrolytique de sulfamate avec différentes concentrations de samarium, nous avons obtenu un revêtement avec une résistance à la corrosion élevée. L'utilisation d'un bain électrolytique avec un additif de diméthyle amine borane (DMAB) conduit à un revêtement avec une dureté élevée. Ainsi, nous avons prépare un revêtement multicouche acier/Ni (Sm)/Ni-B, pour obtenir un dépôt avec bonne résistance à la corrosion (proportionné par la couche de Ni électrolytique obtenu à partir d’un bain avec samarium) et une dureté élevée (proportionné pour la couche Ni-B électrolytique). En outre, en employant la technique de dépôt chimique dynamique (JetMetal) on a obtenu un revêtement de Ni-B ayant une dureté élevée et un revêtement composite de Ni-B-PTFE avec de bonnes propriétés tribologiques. Finalement nous avons élaboré un revêtement multicouche acier /Ni (Sm)/NiB-SDS/NiBPTFE à partir des technologies de dépôt électrochimique et la technique JetMetal, le revêtement obtenu présente une bonne résistance à la corrosion, une dureté élevée et un faible coefficient de frottement.

In this thesis work we investigate the development of monolayer coatings (single layer) and nickel-based multilayers by using wet techniques (electrodeposition and dynamic chemical deposition). The main objective is to obtain a coating with high hardness (above 500 HV) and good corrosion resistance (over 500 hours in salt spray), based on the requirements of the aviation industry, mainly the SAFRAN group. The first part of this thesis examines the development of Ni coatings by using electrodeposition technique. From an electrolytic sulfamate bath with different samarium concentrations, can be obtained coatings with high resistance to corrosion, while the use of an electrolytic bath with dimethyl amine borane (DMAB) leads to a coating with high hardness. The development of multilayer coatings in an alternated way using two electrolytic baths (with different composition), was realized to take advantage of the individual properties of each deposit. Thus the steel/Ni (Sm)/Ni-B multilayer coating was obtained, in order to be use the good corrosion resistance of Ni layer obtained from a bath with samarium and the high hardness of a Ni-B coating. On the other hand, by employing the dynamic chemical deposition technique (JetMetal), Ni-B coating with high hardness and a composite coating Ni-B-PTFE with good tribological properties could be obtained. Finally, a…

Advisors/Committee Members: Stremsdoerfer, Guy (thesis director), Meas Vong, Yunny (thesis director).

Subjects/Keywords: Ni électrolytique; Dépôt chimique dynamique; Résistance à la corrosion; Dureté; Revêtements Ni-B; Revêtements multicouches; Ni electroplating; Dynamic chemical deposition; Corrosion resistance; Hardness; Ni-B coatings; Multilayer coatings; Electrodepósito de Ni; Depósito químico dinámico; Resistencia a la corrosión; Dureza; Recubrimientos Ni-B; Recubrimientos multicapas

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

López López, J. R. (2013). Recubrimientos monocapa y multicapas funcionales, a base de níquel, elaborados por técnicas de electrodepósito y de depósito químico dinámico (DCP) : Revêtements monocouche et multicouches fonctionnelles à base de nickel, élaborés par des techniques électrochimiques et dépôt chimique dynamique (DCP). (Doctoral Dissertation). Ecully, Ecole centrale de Lyon; Centro de Investigación y Desarrollo Tecnológico en Electroquímica. Retrieved from http://www.theses.fr/2013ECDL0028

Chicago Manual of Style (16^th Edition):

López López, Juan Ramón. “Recubrimientos monocapa y multicapas funcionales, a base de níquel, elaborados por técnicas de electrodepósito y de depósito químico dinámico (DCP) : Revêtements monocouche et multicouches fonctionnelles à base de nickel, élaborés par des techniques électrochimiques et dépôt chimique dynamique (DCP).” 2013. Doctoral Dissertation, Ecully, Ecole centrale de Lyon; Centro de Investigación y Desarrollo Tecnológico en Electroquímica. Accessed December 09, 2019. http://www.theses.fr/2013ECDL0028.

MLA Handbook (7^th Edition):

López López, Juan Ramón. “Recubrimientos monocapa y multicapas funcionales, a base de níquel, elaborados por técnicas de electrodepósito y de depósito químico dinámico (DCP) : Revêtements monocouche et multicouches fonctionnelles à base de nickel, élaborés par des techniques électrochimiques et dépôt chimique dynamique (DCP).” 2013. Web. 09 Dec 2019.

Vancouver:

López López JR. Recubrimientos monocapa y multicapas funcionales, a base de níquel, elaborados por técnicas de electrodepósito y de depósito químico dinámico (DCP) : Revêtements monocouche et multicouches fonctionnelles à base de nickel, élaborés par des techniques électrochimiques et dépôt chimique dynamique (DCP). [Internet] [Doctoral dissertation]. Ecully, Ecole centrale de Lyon; Centro de Investigación y Desarrollo Tecnológico en Electroquímica; 2013. [cited 2019 Dec 09]. Available from: http://www.theses.fr/2013ECDL0028.

Council of Science Editors:

López López JR. Recubrimientos monocapa y multicapas funcionales, a base de níquel, elaborados por técnicas de electrodepósito y de depósito químico dinámico (DCP) : Revêtements monocouche et multicouches fonctionnelles à base de nickel, élaborés par des techniques électrochimiques et dépôt chimique dynamique (DCP). [Doctoral Dissertation]. Ecully, Ecole centrale de Lyon; Centro de Investigación y Desarrollo Tecnológico en Electroquímica; 2013. Available from: http://www.theses.fr/2013ECDL0028

Universidad Andrés Bello

18. Santander Flores, Michelle Katherina. Facilitadores y obstaculizadores del trabajo social, como profesional de primera línea inserto en OPD La Florida .

Degree: 2017, Universidad Andrés Bello

URL: http://repositorio.unab.cl/xmlui/handle/ria/4563

► El presente documento se enmarca en los resultados de la investigación realizada durante el tiempo de dos semestres. Para comenzar, se hará referencia a la… (more)

Subjects/Keywords: Municipalidad de La Florida (Chile); Oficina de Protección de Derechos de Niños, Niñas y Adolescentes; Política Social; Investigaciones; Chile; Trabajadores Sociales

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APA (6^th Edition):

Santander Flores, M. K. (2017). Facilitadores y obstaculizadores del trabajo social, como profesional de primera línea inserto en OPD La Florida . (Thesis). Universidad Andrés Bello. Retrieved from http://repositorio.unab.cl/xmlui/handle/ria/4563

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Santander Flores, Michelle Katherina. “Facilitadores y obstaculizadores del trabajo social, como profesional de primera línea inserto en OPD La Florida .” 2017. Thesis, Universidad Andrés Bello. Accessed December 09, 2019. http://repositorio.unab.cl/xmlui/handle/ria/4563.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Santander Flores, Michelle Katherina. “Facilitadores y obstaculizadores del trabajo social, como profesional de primera línea inserto en OPD La Florida .” 2017. Web. 09 Dec 2019.

Vancouver:

Santander Flores MK. Facilitadores y obstaculizadores del trabajo social, como profesional de primera línea inserto en OPD La Florida . [Internet] [Thesis]. Universidad Andrés Bello; 2017. [cited 2019 Dec 09]. Available from: http://repositorio.unab.cl/xmlui/handle/ria/4563.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Santander Flores MK. Facilitadores y obstaculizadores del trabajo social, como profesional de primera línea inserto en OPD La Florida . [Thesis]. Universidad Andrés Bello; 2017. Available from: http://repositorio.unab.cl/xmlui/handle/ria/4563

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales

19. Wei, Tung-Ying. The Microstructure, Hydrogen Storage Properties, and Electrochemical Behaviors of La-Y-Ca-Mg-Ni AB3 type Hydrogen Storage Alloy.

Degree: Materials Science & Engineering, 2017, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/58781 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47582/SOURCE02?view=true

► In this dissertation, partial element substitution was used to improve the hydrogen storage properties and electrochemical cycle stability of AB3 type alloys. In addition composite… (more)

▼ In this dissertation, partial element substitution was used to improve the hydrogen storage properties and electrochemical cycle stability of AB3 type alloys. In addition composite method was proposed to enhance the cycle durability of AB3 type alloys. Meanwhile a critical review on the working principles, advantages and drawbacks, limitations of six categories of techniques commonly applied on the characterization of hydrogen storage materials was presented. These techniques include the Sieverts technique, gravimetry, secondary ion mass spectrometry, thermal desorption spectroscopy, neutron scattering and electrochemical technique.The microstructure and hydrogen storage properties of cost-competitive La0.51-xY0.05+xCa1.03Mg1.32Ni9 (x=0, 0.15, 0.35) alloys were investigated. The change of Y content would alter the microstructure of La-Y-Ca-Mg-Ni alloy such as phase abundance, lattice parameters and cell volume. The Y abundant sample exhibited a higher absorption plateau pressure, lower hydrogen capacity and relatively inferior hydrogen absorption kinetics. In addition the hydride stability was reduced with the increase of Y content. The electrochemical properties of La0.51-xY0.05+xCa1.03Mg1.32Ni9 (x=0, 0.15, 0.35) alloy powder were systematically investigated. The increase of Y content in sample alloy would result in an improvement of cycle stability, suppression of particle pulverization, reduction of formation of corrosion products and elevation of rate capability at higher discharge rate. However excessive Y in the alloy would lead to a decrease in maximum capacity. Overall the electrodes made by La0.42Y0.22Ca0.78Mg1.01Ni9 alloy exhibited the best performance; the cycle stability was improved without significant loss in maximum capacity. The electrochemical performances of composite electrode composed of La0.51Y0.05Ca1.03Mg1.32Ni9 and x wt% La0.63Nd0.08Pr0.02Ce0.27(Al0.02Co0.14Mn0.06Ni0.78)5 (x =10, 30, 50) have also been studied. The electrode with 30 wt% AB5 electrode exhibited the best overall performance; both cycle durability and maximum discharge capacity were enhanced, although the rate capability was deteriorated. The linear polarization and potentiostatic discharge test indicated that rate capability of both La-Y-Ca-Mg-Ni and composite electrodes was dominant by charge transfer reaction at electrode surface at lower discharge rate, and the discharge performance became hydrogen diffusion dependent when the discharge current density rose. Advisors/Committee Members: Chan, Sammy Lap Ip, Materials Science & Engineering, Faculty of Science, UNSW, Yang, Runyu , Materials Science & Engineering, Faculty of Science, UNSW.

Subjects/Keywords: La-Y-Ca-Mg-Ni AB3 type alloy; Hydrogen storage alloy; Ni/MH battery; cycle stability

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APA (6^th Edition):

Wei, T. (2017). The Microstructure, Hydrogen Storage Properties, and Electrochemical Behaviors of La-Y-Ca-Mg-Ni AB3 type Hydrogen Storage Alloy. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/58781 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47582/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Wei, Tung-Ying. “The Microstructure, Hydrogen Storage Properties, and Electrochemical Behaviors of La-Y-Ca-Mg-Ni AB3 type Hydrogen Storage Alloy.” 2017. Doctoral Dissertation, University of New South Wales. Accessed December 09, 2019. http://handle.unsw.edu.au/1959.4/58781 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47582/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Wei, Tung-Ying. “The Microstructure, Hydrogen Storage Properties, and Electrochemical Behaviors of La-Y-Ca-Mg-Ni AB3 type Hydrogen Storage Alloy.” 2017. Web. 09 Dec 2019.

Vancouver:

Wei T. The Microstructure, Hydrogen Storage Properties, and Electrochemical Behaviors of La-Y-Ca-Mg-Ni AB3 type Hydrogen Storage Alloy. [Internet] [Doctoral dissertation]. University of New South Wales; 2017. [cited 2019 Dec 09]. Available from: http://handle.unsw.edu.au/1959.4/58781 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47582/SOURCE02?view=true.

Council of Science Editors:

Wei T. The Microstructure, Hydrogen Storage Properties, and Electrochemical Behaviors of La-Y-Ca-Mg-Ni AB3 type Hydrogen Storage Alloy. [Doctoral Dissertation]. University of New South Wales; 2017. Available from: http://handle.unsw.edu.au/1959.4/58781 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:47582/SOURCE02?view=true

University of Debrecen

20. Fazekas, István. Méréstechnikai gyakorlatok fejlesztése NI-ELVIS-re .

Degree: DE – Informatikai Kar, 2014, University of Debrecen

URL: http://hdl.handle.net/2437/191300

Méréstechnikai feladatok fejlesztése NI-ELVIS-re. A National Instruments fejlesztői eszközének bemutatása rövid méréstechnikai gyakorlatokkal. Méréstechnikai alapismeretek. Egyszerű gyakorlati feladatok megoldással. LabView és Multisim bemutatása. Advisors/Committee Members: Végh, János (advisor).

Subjects/Keywords: NI-ELVIS; Méréstechnika

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fazekas, I. (2014). Méréstechnikai gyakorlatok fejlesztése NI-ELVIS-re . (Thesis). University of Debrecen. Retrieved from http://hdl.handle.net/2437/191300

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fazekas, István. “Méréstechnikai gyakorlatok fejlesztése NI-ELVIS-re .” 2014. Thesis, University of Debrecen. Accessed December 09, 2019. http://hdl.handle.net/2437/191300.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fazekas, István. “Méréstechnikai gyakorlatok fejlesztése NI-ELVIS-re .” 2014. Web. 09 Dec 2019.

Vancouver:

Fazekas I. Méréstechnikai gyakorlatok fejlesztése NI-ELVIS-re . [Internet] [Thesis]. University of Debrecen; 2014. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/2437/191300.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fazekas I. Méréstechnikai gyakorlatok fejlesztése NI-ELVIS-re . [Thesis]. University of Debrecen; 2014. Available from: http://hdl.handle.net/2437/191300

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

21. Yang, Chi-Jung. Antibacterial and Antifungal Effects of Thin Film Metallic Glasses Deposited on Optical Glass.

Degree: Master, Materials and Optoelectronic Science, 2015, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-164259

► Many studies show that the metallic glasses exhibit better properties, such as high strength, hardness, corrosion resistance, larger elastic energy storage and electrical or magnetic.… (more)

Subjects/Keywords: Al-Ni-Y; Aspergillus niger; antibacterial; metallic glasses; antifungal

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APA (6^th Edition):

Yang, C. (2015). Antibacterial and Antifungal Effects of Thin Film Metallic Glasses Deposited on Optical Glass. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-164259

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yang, Chi-Jung. “Antibacterial and Antifungal Effects of Thin Film Metallic Glasses Deposited on Optical Glass.” 2015. Thesis, NSYSU. Accessed December 09, 2019. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-164259.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yang, Chi-Jung. “Antibacterial and Antifungal Effects of Thin Film Metallic Glasses Deposited on Optical Glass.” 2015. Web. 09 Dec 2019.

Vancouver:

Yang C. Antibacterial and Antifungal Effects of Thin Film Metallic Glasses Deposited on Optical Glass. [Internet] [Thesis]. NSYSU; 2015. [cited 2019 Dec 09]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-164259.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yang C. Antibacterial and Antifungal Effects of Thin Film Metallic Glasses Deposited on Optical Glass. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706115-164259

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universitat Rovira i Virgili

22. Serrano Robledo, Eloísa Sofía. Amide Formation via Ni-Catalyzed Reductive Coupling Reactions with Isocyanates.

Degree: Departament de Química Analítica i Química Orgànica, 2018, Universitat Rovira i Virgili

URL: http://hdl.handle.net/10803/586084

► Recently, cross-electrophile couplings have become powerful alternatives to classical cross-coupling reactions that are based on nucleophile/electrophile regimes. Starting from readily available building blocks, reductive couplings… (more)

Subjects/Keywords: Catàlisi de Ni; Acoplament reductiu; Síntesi d'amides; Acoplamiento reductivo; Síntesis de amidas; Ni-catalysis; Reductive coupling; Amide synthesis; Ciències; 547

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APA (6^th Edition):

Serrano Robledo, E. S. (2018). Amide Formation via Ni-Catalyzed Reductive Coupling Reactions with Isocyanates. (Thesis). Universitat Rovira i Virgili. Retrieved from http://hdl.handle.net/10803/586084

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Serrano Robledo, Eloísa Sofía. “Amide Formation via Ni-Catalyzed Reductive Coupling Reactions with Isocyanates.” 2018. Thesis, Universitat Rovira i Virgili. Accessed December 09, 2019. http://hdl.handle.net/10803/586084.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Serrano Robledo, Eloísa Sofía. “Amide Formation via Ni-Catalyzed Reductive Coupling Reactions with Isocyanates.” 2018. Web. 09 Dec 2019.

Vancouver:

Serrano Robledo ES. Amide Formation via Ni-Catalyzed Reductive Coupling Reactions with Isocyanates. [Internet] [Thesis]. Universitat Rovira i Virgili; 2018. [cited 2019 Dec 09]. Available from: http://hdl.handle.net/10803/586084.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Serrano Robledo ES. Amide Formation via Ni-Catalyzed Reductive Coupling Reactions with Isocyanates. [Thesis]. Universitat Rovira i Virgili; 2018. Available from: http://hdl.handle.net/10803/586084

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

23. Oliveira, Drielly Cristina de. Desenvolvimento de catalisadores de Rh/Ni/YSZ e Ru/Ni/YSZ para a reforma interna de etanol em ânodos de células a combustível de óxido sólido.

Degree: Mestrado, Físico-Química, 2012, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/75/75134/tde-27022013-143954/ ;

►

Neste trabalho, investigou-se a atividade catalítica de materiais a base de Ni/YSZ modificados com Rh ou Ru a 0,5%, 1% e 3%, para a reforma… (more)

▼

Neste trabalho, investigou-se a atividade catalítica de materiais a base de Ni/YSZ modificados com Rh ou Ru a 0,5%, 1% e 3%, para a reforma a vapor de etanol (RVE) e seus desempenhos como eletrocatalisadores em células a combustível de óxido sólido (SOFCs - Solid Oxide Fuel Cell). Os catalisadores foram preparados pelo método Pechini e de impregnação. A caracterização estrutural foi realizada utilizando-se as técnicas de Energia Dispersiva de Raios X, Difratometria de Raios X, Redução à Temperatura Programada, Fisissorção de Nitrogênio, Microscopia Eletrônica de Varredura e Análise Elementar. Os testes catalíticos foram realizados a 700 e 900 °C, em uma linha de reação acoplada a um cromatógrafo a gás para o monitoramento dos produtos reacionais gasosos. Os produtos líquidos resultantes da RVE foram analisados por Cromatografia Líquida de Alta Eficiência (CLAE). O objetivo principal foi correlacionar a estrutura e a composição destes materiais com a produção de H2, distribuição de outros produtos reacionais e formação de depósitos de carbono. Os resultados obtidos mostraram que a incorporação de Rh ou Ru no catalisador de Ni/YSZ não resultou em mudanças significativas na estrutura e atividade catalítica, porém promoveu uma diminuição na quantidade de carbono formado, sendo mais expressiva para o caso da adição de Rh. O aumento da temperatura de reação de 700 °C para 900 °C resultou em um aumento da seletividade dos catalisadores para os produtos gasosos e diminuição da formação de coque. O estudo em uma célula unitária de SOFC foi conduzido utilizando-se platina no cátodo e 3%Rh/40%Ni/YSZ(P) no ânodo, em uma célula operando com H2 e ar a 900 °C. Embora as curvas de polarização tenham apresentado baixas densidades de potência, os resultados mostraram que o material de 3%Rh/40%Ni/YSZ(P) foi ativo para a produção e eletro-oxidação de H2 em condições reais de operação das SOFCs. Além disso, mostrou-se que é possível investigar a atividade de eletrocatalisadores de ânodos de SOFC para a reforma de etanol em linhas de reação comumente utilizadas em estudos de catálise heterogênea.

In this work, it was investigated the electrocatalytic activity of Ni/YSZ promoted with Rh or Ru (0.5 wt%, 1.0 wt% and 3.0 wt% content) for the Ethanol Steam Reforming (ESR) reaction, and their performance as electrocatalysts in Solid Oxide Fuel Cells (SOFCs). The catalysts were prepared by the Pechini and Impregnation methods. The material characterization was carried out by Energy Dispersive X-ray (EDX), X-ray Diffraction (DRX), Temperature Programmed Reduction (TPR-H2), N2 physisorption, Scanning Electron Microscopy (SEM), and Elemental Analysis. The catalytic tests were performed at 700 and 900 °C in a reaction system coupled to a gas chromatograph in order to monitor the gaseous products. The liquid products were analyzed by High Performance Liquid Chromatography (HPLC). The structure and composition of these catalysts were correlated to the H2 formation, with the distribution of other parallel reaction products,…

Advisors/Committee Members: Lima, Fabio Henrique Barros de.

Subjects/Keywords: célula a combustível; ethanol steam reforming; fuel cell; Ni/YSZ; Ni/YSZ; reforma a vapor de etanol; SOFC; SOFC

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oliveira, D. C. d. (2012). Desenvolvimento de catalisadores de Rh/Ni/YSZ e Ru/Ni/YSZ para a reforma interna de etanol em ânodos de células a combustível de óxido sólido. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/75/75134/tde-27022013-143954/ ;

Chicago Manual of Style (16^th Edition):

Oliveira, Drielly Cristina de. “Desenvolvimento de catalisadores de Rh/Ni/YSZ e Ru/Ni/YSZ para a reforma interna de etanol em ânodos de células a combustível de óxido sólido.” 2012. Masters Thesis, University of São Paulo. Accessed December 09, 2019. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-27022013-143954/ ;.

MLA Handbook (7^th Edition):

Oliveira, Drielly Cristina de. “Desenvolvimento de catalisadores de Rh/Ni/YSZ e Ru/Ni/YSZ para a reforma interna de etanol em ânodos de células a combustível de óxido sólido.” 2012. Web. 09 Dec 2019.

Vancouver:

Oliveira DCd. Desenvolvimento de catalisadores de Rh/Ni/YSZ e Ru/Ni/YSZ para a reforma interna de etanol em ânodos de células a combustível de óxido sólido. [Internet] [Masters thesis]. University of São Paulo; 2012. [cited 2019 Dec 09]. Available from: http://www.teses.usp.br/teses/disponiveis/75/75134/tde-27022013-143954/ ;.

Council of Science Editors:

Oliveira DCd. Desenvolvimento de catalisadores de Rh/Ni/YSZ e Ru/Ni/YSZ para a reforma interna de etanol em ânodos de células a combustível de óxido sólido. [Masters Thesis]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/75/75134/tde-27022013-143954/ ;

24. Edvan Cordeiro de Miranda. Revestimentos de ligas de nÃquel depositados pelo processo plasma pÃ para aplicaÃÃes na indÃstria do petrÃleo e gÃs.

Degree: PhD, 2014, Universidade Federal do Ceará

URL: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11552 ;

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O objetivo deste trabalho foi avaliar as caracterÃsticas operacionais (produtividade, eficiÃncia de deposiÃÃo, diluiÃÃo, geometria do cordÃo de solda, custo) e metalÃrgicas (microestrutura, resistÃncia Ã… (more)

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O objetivo deste trabalho foi avaliar as caracterÃsticas operacionais (produtividade, eficiÃncia de deposiÃÃo, diluiÃÃo, geometria do cordÃo de solda, custo) e metalÃrgicas (microestrutura, resistÃncia Ã corrosÃo, propriedades mecÃnicas) de revestimentos de ligas de nÃquel depositados pelo processo plasma pÃ aplicado internamente em tubos API. Foram utilizadas as ligas de nÃquel Inconel 625 e Hastelloy C-276. Inicialmente foi realizado um estudo preliminar para conhecer os parÃmetros iniciais de soldagem. Em seguida, foi realizado um estudo definitivo com simples deposiÃÃo, aplicando o MÃtodo Taguchi com intuito de selecionar os melhores parÃmetros de cada fator de controle do processo de soldagem plasma pÃ em um nÃmero reduzido de experimentos. Posteriormente foi realizado um estudo de sobreposiÃÃo de passes e entÃo foi realizada a soldagem definitiva de revestimentos. Nos revestimentos soldados foram realizadas anÃlises das caracterÃsticas geomÃtricas e diluiÃÃo, alÃm de uma caracterizaÃÃo metalÃrgica com uso de microscopia Ãtica, microscopia eletrÃnica de varredura e anÃlise de composiÃÃo quÃmica por EDX. Ainda foram realizadas anÃlises das propriedades mecÃnicas dos revestimentos por meio de ensaios de microdureza, bem como anÃlise de resistÃncia Ã corrosÃo atravÃs do mÃtodo C da norma ASTM G48-03. Os resultados mostraram que o MÃtodo Taguchi proporcionou uma excelente seleÃÃo de parÃmetros para soldagem de revestimentos. Alguns revestimentos soldados apresentaram baixos nÃveis de diluiÃÃo. A microestrutura dos revestimentos soldados com a liga Inconel 625 foi constituÃda de uma matriz , com precipitaÃÃo de fases secundÃrias tipo Laves, ricas em niÃbio, e carbonitretos de titÃnio e niÃbio. JÃ a microestrutura da liga Hastelloy C-276 foi constituÃda de uma matriz  com precipitaÃÃo de fases secundÃrias P e , sendo esta Ãltima fase uma transformaÃÃo parcial da fase P, e ambas as fases ricas em molibdÃnio. Em relaÃÃo Ãs propriedades mecÃnicas, a liga Hastelloy C-276 apresentou maiores nÃveis de dureza comparada com a liga Inconel 625. JÃ na resistÃncia a corrosÃo dos revestimentos soldados, a liga Hastelloy C-276 apresentou uma Temperatura CrÃtica de Pite (TCP) em 60 ÂC. Enquanto a liga Inconel 625 apresentou uma TCP de 75 ÂC.

The aim of this study was to evaluate the operational characteristics (productivity, efficiency deposition, dilution of the weld bead geometry and cost) and metallurgical (microstructure, corrosion resistance, mechanical properties) of weld overlay with nickel-based alloys deposited by powder plasma process, applied internally in API pipes. Inconel 625 and Hastelloy C-276 nickel-based alloys were used. A preliminary study was conducted to understand the initial welding parameters and then a definitive study with simple deposition and applying Taguchi method was performed. The Taguchi method was used to select the best parameters of each factor of control in powder plasma welding using a short number of experiments. A study of overlapping passes to subsequent coatings…

Advisors/Committee Members: Marcelo Ferreira Motta, Theophilo Moura Maciel, Cleiton Carvalho Silva, Jesualdo Pereira Farias, Volodymyr Ponomarov.

Subjects/Keywords: ENGENHARIA DE MATERIAIS E METALURGICA; Soldagem; Ligas Ni-Cr-Mo; CorrosÃo; PTA welding, Ni-Cr-Mo alloy, dilution, corrosion

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Miranda, E. C. d. (2014). Revestimentos de ligas de nÃquel depositados pelo processo plasma pÃ para aplicaÃÃes na indÃstria do petrÃleo e gÃs. (Doctoral Dissertation). Universidade Federal do Ceará. Retrieved from http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11552 ;

Chicago Manual of Style (16^th Edition):

Miranda, Edvan Cordeiro de. “Revestimentos de ligas de nÃquel depositados pelo processo plasma pÃ para aplicaÃÃes na indÃstria do petrÃleo e gÃs.” 2014. Doctoral Dissertation, Universidade Federal do Ceará. Accessed December 09, 2019. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11552 ;.

MLA Handbook (7^th Edition):

Miranda, Edvan Cordeiro de. “Revestimentos de ligas de nÃquel depositados pelo processo plasma pÃ para aplicaÃÃes na indÃstria do petrÃleo e gÃs.” 2014. Web. 09 Dec 2019.

Vancouver:

Miranda ECd. Revestimentos de ligas de nÃquel depositados pelo processo plasma pÃ para aplicaÃÃes na indÃstria do petrÃleo e gÃs. [Internet] [Doctoral dissertation]. Universidade Federal do Ceará 2014. [cited 2019 Dec 09]. Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11552 ;.

Council of Science Editors:

Miranda ECd. Revestimentos de ligas de nÃquel depositados pelo processo plasma pÃ para aplicaÃÃes na indÃstria do petrÃleo e gÃs. [Doctoral Dissertation]. Universidade Federal do Ceará 2014. Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11552 ;

25. Tézenas du Montcel, Henri. Ingénierie des joints de grains dans les superalliages à base de nickel : Grain boundary engineering in Ni-based superalloys.

Degree: Docteur es, Sciences et génie des matériaux, 2012, Paris, ENMP

URL: http://www.theses.fr/2012ENMP0006

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Ce travail est consacré à l'étude de l'ingénierie des joints de grains dans les superalliages à base de Nickel pour disques de turbines aéronautiques. L'ingénierie… (more)

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Ce travail est consacré à l'étude de l'ingénierie des joints de grains dans les superalliages à base de Nickel pour disques de turbines aéronautiques. L'ingénierie des joints de grains a montré son efficacité dans l'amélioration des propriétés en fatigue et en fluage dans certains alliages de cuivre et de nickel. Cette amélioration est obtenue en réalisant une succession de déformations à température ambiante séparées par des traitement thermiques. Ce traitement a pour objectif de modifier la distribution du réseau de joints de grains. L'objectif de l'étude est d'adapter ces traitements au procédé du forgeage à haute température des superalliages. Une étude expérimentale est menée pour mettre en évidence l'influence des paramètres de forgeage sur les caractéristiques du réseau de joints de grains. La caractérisation de ce réseau est faite grâce à la réalisation de cartographies d'orientations cristallographiques par EBSD. Une méthode de caractérisation innovante basée sur la discrétisation des cartographies en réseaux de points triples est proposée. Cette méthode permet d'analyser la connectivité du réseau de joints de grains en vue d'une corrélation avec les propriétés mécaniques.

This work is dedicated to the study of Grain Boundary Engineering in Ni-based superalloys for aircraft turbine disk. The grain boundary engineering has proven its efficiency for the improvement of the fatigue and creep properties of copper and nickel alloys. This improvement is achieved by performing a succession of room temperature deformations interspaced by heat treatments to modify the distribution of the grain boundary network. The aim of the study is to adapt these processes to high temperature forging of superalloys. An experimental study is achieved to highlight the influence of forging parameters on the grain boundary network. The characterization of the grain boundary network is made through the completion of crystallographic orientation mapping by EBSD. An innovative characterization method based on the discretization of orientation maps in a triple junction network is proposed. This method allows to analyze the connectivity in the grain boundary network with the objective of a correlation with mechanical properties.

Advisors/Committee Members: Rémy, Luc (thesis director).

Subjects/Keywords: Ingénierie des joints de grains; Superalliage base Ni; EBSD; Grain Boundary Engineering; Ni Based Superalloys; EBSD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tézenas du Montcel, H. (2012). Ingénierie des joints de grains dans les superalliages à base de nickel : Grain boundary engineering in Ni-based superalloys. (Doctoral Dissertation). Paris, ENMP. Retrieved from http://www.theses.fr/2012ENMP0006

Chicago Manual of Style (16^th Edition):

Tézenas du Montcel, Henri. “Ingénierie des joints de grains dans les superalliages à base de nickel : Grain boundary engineering in Ni-based superalloys.” 2012. Doctoral Dissertation, Paris, ENMP. Accessed December 09, 2019. http://www.theses.fr/2012ENMP0006.

MLA Handbook (7^th Edition):

Tézenas du Montcel, Henri. “Ingénierie des joints de grains dans les superalliages à base de nickel : Grain boundary engineering in Ni-based superalloys.” 2012. Web. 09 Dec 2019.

Vancouver:

Tézenas du Montcel H. Ingénierie des joints de grains dans les superalliages à base de nickel : Grain boundary engineering in Ni-based superalloys. [Internet] [Doctoral dissertation]. Paris, ENMP; 2012. [cited 2019 Dec 09]. Available from: http://www.theses.fr/2012ENMP0006.

Council of Science Editors:

Tézenas du Montcel H. Ingénierie des joints de grains dans les superalliages à base de nickel : Grain boundary engineering in Ni-based superalloys. [Doctoral Dissertation]. Paris, ENMP; 2012. Available from: http://www.theses.fr/2012ENMP0006

Université Montpellier II

26. Gourrier, Laure. Contribution à l'étude de l'hydroxyde de Nickel : aspects fondamentaux et influence du Zinc : Contribution to Nickel hydroxide study : fundamental study and zinc influence.

Degree: Docteur es, Chimie et Physicochimie des matériaux, 2011, Université Montpellier II

URL: http://www.theses.fr/2011MON20232

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Ce travail est peut être séparé en deux parties. Dans la première, nous rapportons l'étude menée sur un composé modèle d'hydroxyde de Nickel. La caractérisation… (more)

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Ce travail est peut être séparé en deux parties. Dans la première, nous rapportons l'étude menée sur un composé modèle d'hydroxyde de Nickel. La caractérisation de ce composé par diffraction X montre qu'il possède une cristallinité supérieure aux hydroxydes de nickel habituellement utilisés. L'observation au microscope électronique à balayage révèle que la poudre est constituée de grains hexagonaux, de dimension supérieure au micromètre, formés de monocristaux, eux aussi hexagonaux, empilés de façon très ordonnée. Les mesures électrochimiques montrent quant à elles que les composés modèles présentent des propriétés redox intéressantes. La morphologie très particulière de ce composé confère à cet hydroxyde de nickel un comportement de type monocristal en spectroscopie Raman. Des mesures in-situ, couplant voltamétrie cyclique et spectroscopie Raman, réalisées sur ce composé modèle, ont donc été mises en place. Les premiers résultats montrent que ces expériences pourraient nous aider à améliorer notre compréhension des mécanismes redox fondamentaux mis en jeu.Dans la deuxième partie, nous étudions le comportement électrochimique d'une électrode de nickel lorsque l'électrolyte (i.e. KOH 7N) est saturé en zinc. Des électrodes de type industriel ont été préparées à partir d'un hydroxyde de Nickel standard et non dopé, puis cyclées en condition galvanostatique. Les échantillons ainsi obtenus ont ensuite été caractérisés par MEB, DRX, IR et EXAFS. Cette dernière technique qui s'est avérée être la plus appropriée pour l'analyse de ces matériaux d'électrodes très hétérogènes nous a ainsi permis d'apporter des réponses pertinentes sur l'insertion du zinc dans la structure cristalline de Ni(OH)2.

This work may be separated in two parts. First, we report the study of a model compound of nickel hydroxide. X-ray diffraction shows that this compound has a better crystallinity than the standard nickel hydroxides used in commercial battery. Scanning Electron Microscopy revealed that the powder of this model hydroxide is composed of hexagonal grains whose dimension is larger than micrometer and who are formed of single-crystals, also hexagonal, stacked in a well ordered way. The electrochemical measurements show that this nickel hydroxide exhibit interesting redox properties. The particular morphology of the compound gives single-crystal type behavior in Raman spectroscopy. Therefore, in-situ measurements combining electrochemical measurements and Raman spectroscopy, performed on a single microscopic hexagonal plate, are proposed. Preliminary results emphasize that this experiment may help us to improve our understanding of the fundamental redox mechanism taking place in nickel hydroxide.Secondly, we study the electrochemical behavior of a nickel electrode in the presence of Zinc in the electrolyte. Industrial-type electrodes were prepared from a standard undoped nickel hydroxide. Then, samples obtained after electrochemical test were characterized by SEM, XRD, IR and EXAFS. The later which turned out to be the most appropriate for…

Advisors/Committee Members: Henn, François (thesis director), Bantignies, Jean-Louis (thesis director).

Subjects/Keywords: Hydroxyde de nickel; Électrochimie; Accumulateur Ni-Zn; Spectroscopie Raman; Exafs; Nickel hydroxide; Electrochemistry; Ni-Zn battery; Raman spectroscopy; Exafs

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gourrier, L. (2011). Contribution à l'étude de l'hydroxyde de Nickel : aspects fondamentaux et influence du Zinc : Contribution to Nickel hydroxide study : fundamental study and zinc influence. (Doctoral Dissertation). Université Montpellier II. Retrieved from http://www.theses.fr/2011MON20232

Chicago Manual of Style (16^th Edition):

Gourrier, Laure. “Contribution à l'étude de l'hydroxyde de Nickel : aspects fondamentaux et influence du Zinc : Contribution to Nickel hydroxide study : fundamental study and zinc influence.” 2011. Doctoral Dissertation, Université Montpellier II. Accessed December 09, 2019. http://www.theses.fr/2011MON20232.

MLA Handbook (7^th Edition):

Gourrier, Laure. “Contribution à l'étude de l'hydroxyde de Nickel : aspects fondamentaux et influence du Zinc : Contribution to Nickel hydroxide study : fundamental study and zinc influence.” 2011. Web. 09 Dec 2019.

Vancouver:

Gourrier L. Contribution à l'étude de l'hydroxyde de Nickel : aspects fondamentaux et influence du Zinc : Contribution to Nickel hydroxide study : fundamental study and zinc influence. [Internet] [Doctoral dissertation]. Université Montpellier II; 2011. [cited 2019 Dec 09]. Available from: http://www.theses.fr/2011MON20232.

Council of Science Editors:

Gourrier L. Contribution à l'étude de l'hydroxyde de Nickel : aspects fondamentaux et influence du Zinc : Contribution to Nickel hydroxide study : fundamental study and zinc influence. [Doctoral Dissertation]. Université Montpellier II; 2011. Available from: http://www.theses.fr/2011MON20232

Universidade do Rio Grande do Norte

27. Alves, José Antonio Barros Leal Reis. Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível .

Degree: 2014, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/19898

► Increasing energy demand is being met largely by fossil fuel reserves, which emit CO2, SOx gases and various other pollutants. So does the search for… (more)

▼ Increasing energy demand is being met largely by fossil fuel reserves, which emit CO2, SOx gases and various other pollutants. So does the search for fuels that emit fewer pollutants and have the same energy efficiency. In this context, hydrogen (H2) has been increasingly recognized as a potential carrier of energy for the near future. This is because the H2 can be obtained by different routes and has a wide application area , in addition to having clean burning, generating only H2O as a product of combustion , and higher energy density per unit mass . The Chemical Looping Reforming process (CLR) has been extensively investigated in recent years, it is possible to regenerate the catalyst by applying cycles of reduction and oxidation. This work has as main objective to develop catalysts based on nickel and cobalt to study the reactivity of reform with chemical recycling process. The catalysts were prepared by three different methods: combustion assisted by microwave, wet impregnation and co-precipitation. All catalysts synthesized have the same amount by weight of the active phases (60% w / w). The other 40 % m/m consists in La2O3 (8% w / w), Al2O3 (30% w / w) and MgO (2%). Oxygen carriers have been named as follows: N or C, nickel or cobalt, followed by the number 3 or 6, meaning 30 to 60% of active phase in the oxide form and C, CI or CP, which means self-combustion assisted by microwave, self-combustion assisted by microwave followed by wet impregnation and co-precipitation. The oxygen carriers were then characterized by the techniques of X-ray diffraction (XRD), surface area (BET), temperature programmed reduction (TPR) and scanning electron microscopy (SEM). The characterization results showed that the different synthesis methods have led to obtaining different morphologies and structures. Redox tests using CH4 as reducing agent and sintetic air as oxidant agent was done with N6C and C6C, N6CI and C6CI and N6CP and C6CP oxygen carriers. The tests revealed different behaviors, depending on active phase and on synthesis procedure. N6C oxygen carrier produced high levels of H2. The C6CI oxygen carrier produced CO2 and H2O without carbon deposits. Advisors/Committee Members: Melo, Dulce Maria de Araújo (advisor), 06117988320 (advisor), http://lattes.cnpq.br/3318871716111536 (advisor).

Subjects/Keywords: Chemical looping; Ni e Co; Carreadores de oxigênio

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alves, J. A. B. L. R. (2014). Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível . (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/19898

Chicago Manual of Style (16^th Edition):

Alves, José Antonio Barros Leal Reis. “Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível .” 2014. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed December 09, 2019. http://repositorio.ufrn.br/handle/123456789/19898.

MLA Handbook (7^th Edition):

Alves, José Antonio Barros Leal Reis. “Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível .” 2014. Web. 09 Dec 2019.

Vancouver:

Alves JABLR. Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível . [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2014. [cited 2019 Dec 09]. Available from: http://repositorio.ufrn.br/handle/123456789/19898.

Council of Science Editors:

Alves JABLR. Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível . [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2014. Available from: http://repositorio.ufrn.br/handle/123456789/19898

28. Wesley Rubin. Influência do ácido aspártico no processo de eletrodeposição de ligas de Cu-Sn-Ni. Avaliação da morfologia, composição, estrutura, adesão e resistência à corrosão dos filmes.

Degree: 2013, Universidade Federal de São Carlos

URL: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=7112

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This research work presents the main results on the development of electrolytic baths with no cyanides for the production of Cu-Sn and Cu-Sn-Ni alloys and… (more)

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This research work presents the main results on the development of electrolytic baths with no cyanides for the production of Cu-Sn and Cu-Sn-Ni alloys and also the morphological, chemical and structural characterization of the coatings and also the assessment adhesion and corrosion resistance of the deposits. From the eletrolytic solutions, it was found that for the production of films on both substrate steel or Pt, the pH should be low enough, i.e. 1.20, to avoid Sn hydrolysis and also maintain the additive fully protonated. Electroanalytical studies were conducted looking for the best deposition conditions for obtaining high quality films both on Pt and steel substrates. The influence of the deposition potential or current and the charge deposition and the effect of the additive on the characteristics of the films were analyzed. The voltammetric curves indicated that the Hasp do not influence significantly the thermodynamics of the deposition process regardless the substrate. Only, the presence of the additive led to lower Ni content in the coatings. In general, the films were dendritic and spongy, regardless of the type of deposition, substrate or the presence of Hasp. The electrodeposits phase composition is influenced by the Hasp only on Pt substrate. The phase composition for those produced on steel, without or with the additive exhibited different phases in comparision wiht those produced on Pt. In relation to the Cu-Sn-Ni deposits adherence on steel substrate, in general, they had regular grip, except deposits A_05, B_05 e A_35 which were more adherent than others. The corrosion studies showed that the performance of Cu-Sn and Cu-Sn-Ni coatings were similar. The corrosion potentials were in the range of - 661 27 mV and -777 73 mV, which were less negative than the Ecor of steel substrate (-759 12). Furthermore, Rp values of deposits were also higher than for steel substrate and thus it can be inferred that the films produced provide good corrosion resistance. The alkaline Cu-Ni-Sn solutions were not stable and produce some metal compounds as precipitates, which were washed, dried, homogenized and characterized. It was found the possibility to use them for powder metallurgy for Cu-Sn-Ni alloys.

O presente trabalho de pesquisa apresenta os principais resultados acerca do desenvolvimento de banhos eletrolíticos, não cianetados, para a produção de ligas de Cu-Sn e Cu-Sn-Ni além da caracterização morfológica, química e estrutural dos eletrodepósitos e a avaliação dos filmes em relação à adesão e resistência contra a corrosão. Sobre as soluções de deposição, foi encontrado que para a produção dos filmes, tanto sobre substrato de aço quanto Pt, o valor de pH deve ser baixo, i.e. aprox. 1,20, para evitar a hidrólise do Sn e manter o aditivo totalmente protonado. Estudos eletroanalíticos foram conduzidos buscando as melhores condições de deposição para obtenção de filmes de boa qualidade. Os filmes foram produzidos sobre Pt e aço 1010. A influência do potencial, corrente e carga de deposição foram analisados, bem…

Advisors/Committee Members: Ivani Aparecida Carlos.

Subjects/Keywords: Eletrodeposição; Corrosão; Adesão; Ligas de Cu-Sn-Ni; Caracterização; QUIMICA

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rubin, W. (2013). Influência do ácido aspártico no processo de eletrodeposição de ligas de Cu-Sn-Ni. Avaliação da morfologia, composição, estrutura, adesão e resistência à corrosão dos filmes. (Thesis). Universidade Federal de São Carlos. Retrieved from http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=7112

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rubin, Wesley. “Influência do ácido aspártico no processo de eletrodeposição de ligas de Cu-Sn-Ni. Avaliação da morfologia, composição, estrutura, adesão e resistência à corrosão dos filmes.” 2013. Thesis, Universidade Federal de São Carlos. Accessed December 09, 2019. http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=7112.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rubin, Wesley. “Influência do ácido aspártico no processo de eletrodeposição de ligas de Cu-Sn-Ni. Avaliação da morfologia, composição, estrutura, adesão e resistência à corrosão dos filmes.” 2013. Web. 09 Dec 2019.

Vancouver:

Rubin W. Influência do ácido aspártico no processo de eletrodeposição de ligas de Cu-Sn-Ni. Avaliação da morfologia, composição, estrutura, adesão e resistência à corrosão dos filmes. [Internet] [Thesis]. Universidade Federal de São Carlos; 2013. [cited 2019 Dec 09]. Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=7112.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rubin W. Influência do ácido aspártico no processo de eletrodeposição de ligas de Cu-Sn-Ni. Avaliação da morfologia, composição, estrutura, adesão e resistência à corrosão dos filmes. [Thesis]. Universidade Federal de São Carlos; 2013. Available from: http://www.bdtd.ufscar.br/htdocs/tedeSimplificado//tde_busca/arquivo.php?codArquivo=7112

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Rio Grande do Norte

29. Alves, José Antonio Barros Leal Reis. Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível .

Degree: 2014, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/19898

► Increasing energy demand is being met largely by fossil fuel reserves, which emit CO2, SOx gases and various other pollutants. So does the search for… (more)

▼ Increasing energy demand is being met largely by fossil fuel reserves, which emit CO2, SOx gases and various other pollutants. So does the search for fuels that emit fewer pollutants and have the same energy efficiency. In this context, hydrogen (H2) has been increasingly recognized as a potential carrier of energy for the near future. This is because the H2 can be obtained by different routes and has a wide application area , in addition to having clean burning, generating only H2O as a product of combustion , and higher energy density per unit mass . The Chemical Looping Reforming process (CLR) has been extensively investigated in recent years, it is possible to regenerate the catalyst by applying cycles of reduction and oxidation. This work has as main objective to develop catalysts based on nickel and cobalt to study the reactivity of reform with chemical recycling process. The catalysts were prepared by three different methods: combustion assisted by microwave, wet impregnation and co-precipitation. All catalysts synthesized have the same amount by weight of the active phases (60% w / w). The other 40 % m/m consists in La2O3 (8% w / w), Al2O3 (30% w / w) and MgO (2%). Oxygen carriers have been named as follows: N or C, nickel or cobalt, followed by the number 3 or 6, meaning 30 to 60% of active phase in the oxide form and C, CI or CP, which means self-combustion assisted by microwave, self-combustion assisted by microwave followed by wet impregnation and co-precipitation. The oxygen carriers were then characterized by the techniques of X-ray diffraction (XRD), surface area (BET), temperature programmed reduction (TPR) and scanning electron microscopy (SEM). The characterization results showed that the different synthesis methods have led to obtaining different morphologies and structures. Redox tests using CH4 as reducing agent and sintetic air as oxidant agent was done with N6C and C6C, N6CI and C6CI and N6CP and C6CP oxygen carriers. The tests revealed different behaviors, depending on active phase and on synthesis procedure. N6C oxygen carrier produced high levels of H2. The C6CI oxygen carrier produced CO2 and H2O without carbon deposits. Advisors/Committee Members: Melo, Dulce Maria de Araújo (advisor), 06117988320 (advisor), http://lattes.cnpq.br/3318871716111536 (advisor).

Subjects/Keywords: Chemical looping; Ni e Co; Carreadores de oxigênio

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alves, J. A. B. L. R. (2014). Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível . (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/19898

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Alves, José Antonio Barros Leal Reis. “Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível .” 2014. Thesis, Universidade do Rio Grande do Norte. Accessed December 09, 2019. http://repositorio.ufrn.br/handle/123456789/19898.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Alves, José Antonio Barros Leal Reis. “Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível .” 2014. Web. 09 Dec 2019.

Vancouver:

Alves JABLR. Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível . [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2014. [cited 2019 Dec 09]. Available from: http://repositorio.ufrn.br/handle/123456789/19898.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Alves JABLR. Síntese de carreadores de oxigênio à base de Ni e Co para estudo do processo de Chemical Looping usando CH4 como combustível . [Thesis]. Universidade do Rio Grande do Norte; 2014. Available from: http://repositorio.ufrn.br/handle/123456789/19898

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Nova

30. Fernandes, Alexandre Agostinho Florêncio. Caracterização do comportamento à fadiga de instrumentos de Ni-Ti para aplicações de endodontia.

Degree: 2013, Universidade Nova

URL: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10135

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Dissertação para obtenção do Grau de Mestre em Engenharia Mecânica

O objetivo desta dissertação é estudar o comportamento à fadiga de quatro tamanhos diferentes de… (more)

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Dissertação para obtenção do Grau de Mestre em Engenharia Mecânica

O objetivo desta dissertação é estudar o comportamento à fadiga de quatro tamanhos diferentes de instrumentos endodônticos de níquel-titânio, desenvolvidos recentemente, e estudar o seu comportamento estrutural numa análise de elementos finitos não linear. Sessenta e quatro instrumento Hyflex (Coltene, Switzerland) com quatro tamanhos diferentes, nomeadamente .04/20, .06/20, .04/35 e .06/35 foram sujeitos a testes de fadiga. Os instrumentos foram colocados em rotação, numa montagem experimental, que lhes provocou flexão. O raio e ângulo de curvatura imposto foi de 4,7mm e 45º, respetivamente, com o objetivo de simular a utilização num canal radicular. Os instrumentos foram testados a duas velocidades de rotação diferentes, 500 r.p.m. e 250 r.p.m., o tempo até à fratura foi contabilizado e calculou-se o número de ciclos à fadiga. Efetuou-se uma análise estatística, com os dados obtidos. As superfícies de fratura foram observadas no microscópio eletrónico de varrimento (MEV) Hitachi S-2400 e a composição química dos instrumentos foi determinada. Seguidamente foi visualizada a origem e direção das fendas por fadiga assim como os planos de fratura e determinou-se a área de fratura. Foi calculada uma área circular equivalente para cada instrumento, da superfície de fratura, de modo a calcular a tensão e extensão teóricos com o objetivo de comparar com a distribuição de tensões e extensões obtidas pelo método dos elementos finitos. Analisando os resultados obtidos, verifica-se que existem diferenças significativas nos diferentes tamanhos de instrumentos e velocidades testadas. O valor mais alto do número de ciclos à fadiga – 4185 rotações – foi calculado para o instrumento de tamanho .06/20 testado a 250 r.p.m. e o menor valor – 747 rotações – verificou-se no instrumento de tamanho .04/35 testado a 500 r.p.m. O mecanismo de propagação das fendas de fadiga foi maioritariamente transgranular, no modo I, e verificou-se que o acabamento superficial dos instrumentos tem um papel importante na nucleação e propagação de fadiga. A composição química dos instrumentos analisados revelou uma composição química média de 54,22 %wt. e 45,78 %wt. de níquel e titânio, respetivamente, e verificou-se uma baixa variância de resultados. Os valores teóricos de extensão e tensão estão de acordo com os valores obtidos pelo método dos elementos finitos. Conclui-se que o tamanho do instrumento e a velocidade de rotação do mesmo tem uma grande influência na vida à fadiga dos mesmos.

Advisors/Committee Members: Martins, Rui F., Ginjeira, António.

Subjects/Keywords: Endodontia; Instrumentos de Ni-Ti; Fadiga; Análise elementos finitos; Composição química

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fernandes, A. A. F. (2013). Caracterização do comportamento à fadiga de instrumentos de Ni-Ti para aplicações de endodontia. (Thesis). Universidade Nova. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10135

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fernandes, Alexandre Agostinho Florêncio. “Caracterização do comportamento à fadiga de instrumentos de Ni-Ti para aplicações de endodontia.” 2013. Thesis, Universidade Nova. Accessed December 09, 2019. http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10135.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fernandes, Alexandre Agostinho Florêncio. “Caracterização do comportamento à fadiga de instrumentos de Ni-Ti para aplicações de endodontia.” 2013. Web. 09 Dec 2019.

Vancouver:

Fernandes AAF. Caracterização do comportamento à fadiga de instrumentos de Ni-Ti para aplicações de endodontia. [Internet] [Thesis]. Universidade Nova; 2013. [cited 2019 Dec 09]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10135.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fernandes AAF. Caracterização do comportamento à fadiga de instrumentos de Ni-Ti para aplicações de endodontia. [Thesis]. Universidade Nova; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/10135

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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