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Univerzitet u Beogradu

1. Трпков, Ђорђе Б., 1981- 30684007. Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства.

Degree: Fakultet za fizičku hemiju, 2019, Univerzitet u Beogradu

Физичка хемија - Физичка хемија материјала / Physical chemistry - Physical chemistry of materials

У овој докторској дисертацији описана је хидротермална синтеза наночестичног хематита (α-Fe2O3), као и карактеризација материјала, у сврху његове потенцијалне примене у различитим областима. Синтетисани узорци су карактерисани ренгеноструктурном анализом (XRDP), електронском микроскопијом (SEM и TEM), магнетометријом са вибрирајућим узорком (VSM) и вибрационом спектроскопијом (FTIR и Raman). Извршена је и математичка анализа морфологија честица, применом дескриптора облика на одабране ТЕМ слике узорака...

Advisors/Committee Members: Tadić, Marin, 1972- 9906535.

Subjects/Keywords: hydrothermal synthesis; iron oxide; hematite (α-Fe2O3); magnetic properties; self-assembl; TEM image analysis

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

APA (6th Edition):

Трпков, Ђорђе Б., 1. 3. (2019). Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:20527/bdef:Content/get

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

Chicago Manual of Style (16th Edition):

Трпков, Ђорђе Б., 1981- 30684007. “Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства.” 2019. Thesis, Univerzitet u Beogradu. Accessed January 16, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:20527/bdef:Content/get.

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

MLA Handbook (7th Edition):

Трпков, Ђорђе Б., 1981- 30684007. “Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства.” 2019. Web. 16 Jan 2021.

Vancouver:

Трпков, Ђорђе Б. 13. Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства. [Internet] [Thesis]. Univerzitet u Beogradu; 2019. [cited 2021 Jan 16]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:20527/bdef:Content/get.

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

Council of Science Editors:

Трпков, Ђорђе Б. 13. Хидротермална синтеза наночестичног хематита, структурна, морфолошка и магнетна својства. [Thesis]. Univerzitet u Beogradu; 2019. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:20527/bdef:Content/get

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


Université de Lorraine

2. Jouanny, Emilie. Étude de l'évolution microstructurale sous irradiation aux ions Ti2+ de deux alliages de titane : lien avec les propriétés mécaniques : Microstructural evolution study of two titanium alloys under Ti2+ ion irradiation : Link with mechanical properties.

Degree: Docteur es, Sciences des matériaux, 2017, Université de Lorraine

Ce travail de thèse s’intéresse à l’évolution de la microstructure sous irradiation d’alliages de titane, en vue de leur potentielle utilisation dans le domaine du nucléaire. Une étude paramétrique (température, dose et flux d’irradiation) a donc été menée, à l’aide de simulations d’irradiations neutroniques par des irradiations aux ions (plateforme JANNuS – Saclay), sur les alliages T40 et TA6V, et de caractérisations microstructurales qualitatives et quantitatives post irradiation (MET, analyse d’image, SAT). Ainsi, différents défauts d’irradiation ont été identifiés. En particulier, la présence de boucles à composante <c> dans l’alliage T40 et de précipités riches en vanadium dans l’alliage TA6V a clairement pu être mise en évidence dès la température de 300°C. La microstructure résultante est fortement dépendante des paramètres d’irradiation et de l’alliage de titane considéré. Un effet important de la température (entre 300°C et 430°C) a été noté sur les boucles de dislocations de type <a> pour l’alliage T40 et sur les précipités pour l’alliage TA6V. Les doses et les flux considérés à 300°C ne modifient pas la distribution des défauts des deux alliages. A 430°C, l’augmentation de la dose modifie peu le paysage des boucles de dislocations de type <a> pour l’alliage TA6V contrairement à l’alliage T40. Les précipités, quant à eux ne semblent pas affectés par l’augmentation de la dose. Une analyse des mécanismes mis en jeu est proposée. Enfin, des essais de nano-indentation ont permis une première description du lien microstructure / propriétés mécaniques. A 430°C, l'alliage T40 ne semble pas être impacté mécaniquement par l’évolution de la microstructure avec la dose d’irradiation contrairement à l'alliage TA6V

This PhD work deals with microstructural evolution of titanium alloys under irradiation, due to their potential use in the nuclear field. Parametric study (temperature, dose and irradiation flux) was conducted, using ion irradiations (JANNuS – Saclay platform) to simulate neutron irradiation damage. Two titanium alloys (CP Ti grade 2 and Ti-6Al-4V) were considered and qualitative and quantitative post irradiation microstructural characterizations were done (TEM, image analysis, APT). Thus, various irradiation defects were identified. In particular, presence of <c>-component loops was highlighted in CP Ti grade 2 and vanadium-rich precipitates in Ti-6Al-4V from the temperature of 300°C. Resulting microstructure is hardly depending on irradiation parameters and considered titanium alloys. Important effect of temperature (between 300°C and 430°C) was noted on <a>-type dislocation loops in CP Ti grade 2 and precipitates in Ti-6Al-4V. At 300°C, dose and flux have no effect on the defect distribution of the two titanium alloys. At 430°C, the increase of dose has a little consequence on the <a>-type dislocation loops in Ti-6Al-4V, contrary to the ones observed in CP Ti grade 2. Precipitates, observed in Ti-6Al-4V, do not seem to be affected by the increase of the dose. Analysis of involved mechanisms is…

Advisors/Committee Members: Dehmas, Moukrane (thesis director).

Subjects/Keywords: Alliages de titane; Irradiations aux ions; Évolution des défauts d’irradiation; MET; Analyse d’image; Titanium alloys; Ion irradiations; Irradiation defect evolution; TEM; Image analysis

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

APA (6th Edition):

Jouanny, E. (2017). Étude de l'évolution microstructurale sous irradiation aux ions Ti2+ de deux alliages de titane : lien avec les propriétés mécaniques : Microstructural evolution study of two titanium alloys under Ti2+ ion irradiation : Link with mechanical properties. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2017LORR0071

Chicago Manual of Style (16th Edition):

Jouanny, Emilie. “Étude de l'évolution microstructurale sous irradiation aux ions Ti2+ de deux alliages de titane : lien avec les propriétés mécaniques : Microstructural evolution study of two titanium alloys under Ti2+ ion irradiation : Link with mechanical properties.” 2017. Doctoral Dissertation, Université de Lorraine. Accessed January 16, 2021. http://www.theses.fr/2017LORR0071.

MLA Handbook (7th Edition):

Jouanny, Emilie. “Étude de l'évolution microstructurale sous irradiation aux ions Ti2+ de deux alliages de titane : lien avec les propriétés mécaniques : Microstructural evolution study of two titanium alloys under Ti2+ ion irradiation : Link with mechanical properties.” 2017. Web. 16 Jan 2021.

Vancouver:

Jouanny E. Étude de l'évolution microstructurale sous irradiation aux ions Ti2+ de deux alliages de titane : lien avec les propriétés mécaniques : Microstructural evolution study of two titanium alloys under Ti2+ ion irradiation : Link with mechanical properties. [Internet] [Doctoral dissertation]. Université de Lorraine; 2017. [cited 2021 Jan 16]. Available from: http://www.theses.fr/2017LORR0071.

Council of Science Editors:

Jouanny E. Étude de l'évolution microstructurale sous irradiation aux ions Ti2+ de deux alliages de titane : lien avec les propriétés mécaniques : Microstructural evolution study of two titanium alloys under Ti2+ ion irradiation : Link with mechanical properties. [Doctoral Dissertation]. Université de Lorraine; 2017. Available from: http://www.theses.fr/2017LORR0071


University of Florida

3. Pletcher, Ben. Kinetics of Aluminum Lithium Alloys.

Degree: PhD, Materials Science and Engineering, 2009, University of Florida

Aluminum lithium alloys are increasingly used in aerospace for their high strength-to-weight ratio. Additions of lithium, up to 4.2 wt% decrease the alloy density while increasing the modulus and yield strength. The metastable, second phase Al3Li or 0 is intriguing, as it remains spherical and coherent with the matrix phase, , well into the overaged condition. Small interfacial strain energy allows these precipitates to remain spherical for volume fractions (VV ) of 0 less than 0.3, making this alloy system ideal for investigation of late-stage coarsening phenomena. Experimental characterization of three binary Al-Li alloys are presented as a critical test of di usion screening theory and multi-particle di usion simulations. Quantitative transmission electron microscopy is used to image the precipitates directly using the centered dark- eld technique. Images are analyzed autonomously within a novel Matlab function that determines the center and size of each precipitate. Particle size distribution, particle growth kinetics, and maximum particle size are used to track the precipitate growth and correlate with the predictions of screening theory and multi-particle di usion simulations. This project is the rst extensive study of Al-Li alloys, in over 25 years, applying modern transmission electron microscopy and image analysis techniques. Previous studies sampled but a single alloy composition, and measured far fewer precipitates. This study investigates 3 alloys with volume fractions of the 0 precipitates, VV =0.1-0.27, aged at 225C for 1 to 10 days. More than 1000 precipitates were sampled per aging time, creating more statistically signi cant data. Experimental results are used to test the predictions based on di usion screening theory and multi-particle aging simulations. ( en ) Advisors/Committee Members: Glicksman, Martin E. (committee chair), Phillpot, Simon R. (committee member), Bourne, Gerald R. (committee member), Fuchs, Gerhard E. (committee member), Narayanan, Ranganathan (committee member).

Subjects/Keywords: Alloys; Centroids; Diameters; Image analysis; Image processing; Kinetics; Material concentration; Particle diffusion; Particle size distribution; Precipitates; aluminum, coarsening, diffusion, experimental, lithium, microstructural, multiparticle, ostwald, ripening, screening, simulation, tem

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

APA (6th Edition):

Pletcher, B. (2009). Kinetics of Aluminum Lithium Alloys. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0024666

Chicago Manual of Style (16th Edition):

Pletcher, Ben. “Kinetics of Aluminum Lithium Alloys.” 2009. Doctoral Dissertation, University of Florida. Accessed January 16, 2021. https://ufdc.ufl.edu/UFE0024666.

MLA Handbook (7th Edition):

Pletcher, Ben. “Kinetics of Aluminum Lithium Alloys.” 2009. Web. 16 Jan 2021.

Vancouver:

Pletcher B. Kinetics of Aluminum Lithium Alloys. [Internet] [Doctoral dissertation]. University of Florida; 2009. [cited 2021 Jan 16]. Available from: https://ufdc.ufl.edu/UFE0024666.

Council of Science Editors:

Pletcher B. Kinetics of Aluminum Lithium Alloys. [Doctoral Dissertation]. University of Florida; 2009. Available from: https://ufdc.ufl.edu/UFE0024666

.