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University of Toronto
1.
Liu, Gongtao.
Characterization of Electrodeposited Nanocrystalline Ni Microtrusses.
Degree: 2014, University of Toronto
URL: http://hdl.handle.net/1807/67921
► Polymer microtrusses with nanocrystalline nickel coatings can exhibit excellent mechanical performance, which is greatly dependent on the thickness distribution of the coating. The dependence of…
(more)
▼ Polymer microtrusses with nanocrystalline nickel coatings can exhibit excellent mechanical performance, which is greatly dependent on the thickness distribution of the coating. The dependence of coating thickness distribution on the electrodeposition parameters was investigated by numerical modeling. From the models, it was found that the coating thickness distribution on the struts tends to become more uneven with the increase in plating time and current density. A method has been established to predict the coating thickness distribution at different times. Experimental characterization methods were also developed. First, X-ray tomography was used for characterizing the thickness distribution. It was found that the surface roughness of the starting template greatly influences the coating thickness distribution of plated materials. Second, a mechanical test fixture was developed to accurately measure the inelastic buckling resistance of the core struts in compression. The reliability of the test method was investigated using microtrusses consisting of various numbers of unit cells and unit cell sizes.
M.A.S.
Advisors/Committee Members: Hibbard, D Glenn, Materials Science and Engineering.
Subjects/Keywords: coating thickness distribution; microtruss; nickel coating; 0794
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APA (6th Edition):
Liu, G. (2014). Characterization of Electrodeposited Nanocrystalline Ni Microtrusses. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/67921
Chicago Manual of Style (16th Edition):
Liu, Gongtao. “Characterization of Electrodeposited Nanocrystalline Ni Microtrusses.” 2014. Masters Thesis, University of Toronto. Accessed February 27, 2021.
http://hdl.handle.net/1807/67921.
MLA Handbook (7th Edition):
Liu, Gongtao. “Characterization of Electrodeposited Nanocrystalline Ni Microtrusses.” 2014. Web. 27 Feb 2021.
Vancouver:
Liu G. Characterization of Electrodeposited Nanocrystalline Ni Microtrusses. [Internet] [Masters thesis]. University of Toronto; 2014. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1807/67921.
Council of Science Editors:
Liu G. Characterization of Electrodeposited Nanocrystalline Ni Microtrusses. [Masters Thesis]. University of Toronto; 2014. Available from: http://hdl.handle.net/1807/67921

University of Minnesota
2.
Wu, Yan.
Drying and Cracking Behavior of Aqueous Particulate Coatings.
Degree: PhD, Chemical Engineering, 2018, University of Minnesota
URL: http://hdl.handle.net/11299/196512
► The goal of this work is to understand the connections between stress, structural and mechanical property development during the drying of particulate coatings containing rigid…
(more)
▼ The goal of this work is to understand the connections between stress, structural and mechanical property development during the drying of particulate coatings containing rigid particles, and the how these conditions are impacted by coating formulation variables and processing conditions. The motivation is to better predict and control the coating performance by optimizing the formulation design and drying condition. Characterizing drying behavior and correlating the stress development with microstructure evolution are critical in this research. In Chapter 3, drying characterization approaches are introduced. To extend the capability of stress measurement, walled substrates with different dimensions and materials were designed. And a shrinkage measurement method allowing convenient correlation of the microstructure change with stress development was developed using laser profilometry technique. Chapters 4-6 focus on investigating the role of formulation variables on the drying and cracking of coatings prepared with micron-sized particles. Chapter 4 focuses on studying the effect of particle size distribution. The study showed that with similar average particle size, coatings prepared from particles with a wide particle size distribution form a more compact microstructure, but are prone to cracking due to high tensile stress development on drying. Chapters 5 and 6 study the effect of particle shape on coatings cracking resistance. Different levels of clay particles were added to particulate coating systems prepared from the irregular-shaped ground calcium carbonate (GCC) particles and the spherical-shaped silica particles. The different geometry constraints of the mixed particles have altered impacts on the drying shrinkage and mechanical strength of the coatings, thus different cracking behaviors were observed. Finally, in Chapter 7 attention is shifted from the particulate coatings with the micron-sized particle to those prepared from nano-sized particles. Formulation variables of particle size and shape were characterized using coatings of nano-silica particles, nano-zinc oxide particles, and fumed-silica.
Subjects/Keywords: coating formulation; cracking; particle shape; particle size distribution; particulate coating; stress
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APA ·
Chicago ·
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CSE |
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APA (6th Edition):
Wu, Y. (2018). Drying and Cracking Behavior of Aqueous Particulate Coatings. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/196512
Chicago Manual of Style (16th Edition):
Wu, Yan. “Drying and Cracking Behavior of Aqueous Particulate Coatings.” 2018. Doctoral Dissertation, University of Minnesota. Accessed February 27, 2021.
http://hdl.handle.net/11299/196512.
MLA Handbook (7th Edition):
Wu, Yan. “Drying and Cracking Behavior of Aqueous Particulate Coatings.” 2018. Web. 27 Feb 2021.
Vancouver:
Wu Y. Drying and Cracking Behavior of Aqueous Particulate Coatings. [Internet] [Doctoral dissertation]. University of Minnesota; 2018. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/11299/196512.
Council of Science Editors:
Wu Y. Drying and Cracking Behavior of Aqueous Particulate Coatings. [Doctoral Dissertation]. University of Minnesota; 2018. Available from: http://hdl.handle.net/11299/196512

NSYSU
3.
Wang , Jhao-Shun.
Analysis of Residual Stress Distribution in ITO Thin Film Coated on Si-Substrate by Applying DIC Technique and Taguchi Method.
Degree: Master, Mechanical and Electro-Mechanical Engineering, 2016, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718116-153028
► In the MEMS process, a thin film is likely to be coated on a substrate. Residual stress is established in the coating upon cooling to…
(more)
▼ In the MEMS process, a thin film is likely to be coated on a substrate. Residual stress is established in the
coating upon cooling to room temperature because thermal expansion coefficients of the thin film and the substrate are different. The residual stress in the
coating not only causes bending but also affects the quality of
coating. This thesis discusses the relationship of the residual stress and its
distribution with the parameters of the process and the thickness of the ITO thin film that is coated on the Si-substrate.
Four parameters of
coating process -
coating time, sputtering power, working pressure, and argon flow rate â are considered here. In the experiment, each parameter is set to one of three levels, consistent with the Taguchi Method, yielding nine combinations. For each of the nine combinations, three Si-substrates are used. Measurements are made at nine points on each Si-substrate. Two sets of the in-plane displacement of the
coating from two different angles of the screen can be measured by using digital image correlation technique. The obtained sets of in-plane displacements can be used to calculate the out-of-plane displacement, the components of residual stress in the x-direction and the y-direction can be calculated using the modified Stoneyâs equation. The equivalent residual stress is calculated from these components of residual stresses, and the coefficient of variation is calculated from the average and standard deviation of the equivalent residual stress at the nine points on the Si-substrate. Finally, the
distribution of residual stress in
coating is discussed with reference to the experimentally obtained coefficient of variation.
The experimental results indicate that the
coating time and the sputtering power importantly affect the magnitude of residual stress, but the working pressure and the argon flow rate have very little effect. Additionally, the experimental results show that the residual stress
distribution is affected by
coating time, sputtering power, argon flow rate and working pressure, in order of declining strength of the effect. The
coating time most strongly affects the
coating process. As the
coating thickness increases, the residual stress decreases and the variation among measurements made of three Si-substrates of same combination declines. Restated, the precision of the experimental measurements improves with the
coating thickness, but the
distribution of residual stress becomes less uniform.
Advisors/Committee Members: T. N. Shiau (chair), Jung-Hung Sun (chair), Chung-Ting Wang (chair), Chi-Hui Chien (committee member).
Subjects/Keywords: Digital Image Correlation Method; Indium Tin Oxide Film; Taguchi Method; Coating Residual Stress; Coating Distribution
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Wang , J. (2016). Analysis of Residual Stress Distribution in ITO Thin Film Coated on Si-Substrate by Applying DIC Technique and Taguchi Method. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718116-153028
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):
Wang , Jhao-Shun. “Analysis of Residual Stress Distribution in ITO Thin Film Coated on Si-Substrate by Applying DIC Technique and Taguchi Method.” 2016. Thesis, NSYSU. Accessed February 27, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718116-153028.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wang , Jhao-Shun. “Analysis of Residual Stress Distribution in ITO Thin Film Coated on Si-Substrate by Applying DIC Technique and Taguchi Method.” 2016. Web. 27 Feb 2021.
Vancouver:
Wang J. Analysis of Residual Stress Distribution in ITO Thin Film Coated on Si-Substrate by Applying DIC Technique and Taguchi Method. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Feb 27].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718116-153028.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wang J. Analysis of Residual Stress Distribution in ITO Thin Film Coated on Si-Substrate by Applying DIC Technique and Taguchi Method. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718116-153028
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Western Ontario
4.
Zhu, Xinping.
Modifications to ACM Classifier and Fine Powder Coating for Plastic Components.
Degree: 2017, University of Western Ontario
URL: https://ir.lib.uwo.ca/etd/4380
► Powder coating is a dry coating technology, which has several advantages over conventional liquid coatings. However, wider applications were limited by its inferior surface finish…
(more)
▼ Powder coating is a dry coating technology, which has several advantages over conventional liquid coatings. However, wider applications were limited by its inferior surface finish and increased film thickness. Making powder finer (fine powder technology) can provide much better surface appearance and smaller film thickness comparable to liquid coating, but it’s much more difficult to produce fine powder products with narrow particle size distributions than coarse powder. Another issue that restricts the applications is its electrostatic spraying method, which limits the applications mainly to be with conductive substrates, like metals.
In this study, to ensure a narrow particle size distribution of fine powder products, nine kinds of modification were conducted with the classifier of widely-used air classifying mill (ACM) by changing the air flow through it. For each kind of modification, the experiments were conducted under five operating conditions and were repeated for three times. According to the results of 150 samples, the particle sizes and particle size distributions of products were greatly affected by the classifier configuration. All nine kinds of modification showed better performance than the original classifier on narrowing particle size distributions, without compromising any collection efficiency.
In addition, non-conductive plastics were employed as substrates in fine powder experiments, using two popular commercial coating powders. Results showed that lowering the particle sizes and narrowing particle size distributions of coating powders contributed to better surface finishes on the workpieces. Besides, due to the poor flowability of fine powder, different amounts of flow additives were used with fine coating powders, and the optimum amount of additives was selected considering the effects on both flowability and surface quality. Furthermore, utilizing voltage was proven to be an effective method assisting pre-heating to increase transfer efficiency.
Subjects/Keywords: Classifier; particle size distribution; fine coating powder; plastic substrate; surface quality; flowability; Polymer Science
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhu, X. (2017). Modifications to ACM Classifier and Fine Powder Coating for Plastic Components. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/4380
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):
Zhu, Xinping. “Modifications to ACM Classifier and Fine Powder Coating for Plastic Components.” 2017. Thesis, University of Western Ontario. Accessed February 27, 2021.
https://ir.lib.uwo.ca/etd/4380.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhu, Xinping. “Modifications to ACM Classifier and Fine Powder Coating for Plastic Components.” 2017. Web. 27 Feb 2021.
Vancouver:
Zhu X. Modifications to ACM Classifier and Fine Powder Coating for Plastic Components. [Internet] [Thesis]. University of Western Ontario; 2017. [cited 2021 Feb 27].
Available from: https://ir.lib.uwo.ca/etd/4380.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhu X. Modifications to ACM Classifier and Fine Powder Coating for Plastic Components. [Thesis]. University of Western Ontario; 2017. Available from: https://ir.lib.uwo.ca/etd/4380
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Ottawa
5.
Song, Di.
Study of Electrostatic Charging and Particle Wall Fouling in a Pilot-scale Pressurized Gas-Solid Fluidized Bed up to Turbulent Flow Regime
.
Degree: 2017, University of Ottawa
URL: http://hdl.handle.net/10393/36007
► In gas-solid fluidized beds, the generation of electrostatic charges due to continuous contacts between fluidizing particles, and the particles and the fluidization vessel wall, is…
(more)
▼ In gas-solid fluidized beds, the generation of electrostatic charges due to continuous contacts between fluidizing particles, and the particles and the fluidization vessel wall, is unavoidable. Industrial operations, such as the production of polyethylene, are susceptible to significant operational challenges caused by electrostatics including reactor wall fouling, a problem known as “sheeting”. The formation of particle sheets can require shutdown periods for clean-up which results in significant economic losses. To gain a better understanding of the underlying mechanisms of electrostatic charging in gas-solid fluidized beds, in an attempt to eliminate or minimize this problem, a pilot-scale pressurized gas-solid fluidization system was designed and built, housing an online electrostatic charge measurement technique consisting of two Faraday cups. The system permits the study of the degree of particle wall fouling at pressures and temperatures up to 2600 kPa and 100°C, respectively, and gas velocities up to 1 m/s (covering a range including turbulent flow regime). The system also allowed, for the first time, the measurement of the fluidizing particles’ mass, net charge and size distribution in various regions of the bed, especially those related to the wall coating under the industrially relevant operating conditions of high pressures and gas velocities. Experimental trials were carried out using polyethylene resin received from commercial reactors to investigate the influence of pressure and gas velocity on the bed hydrodynamics and in turn, the degree of bed electrification.
Mechanisms for particle charging, migration and adherence to the column wall were proposed. The size distribution of the gas bubbles shifted towards smaller bubbles as the operating pressure was raised. Thus, higher pressures lead to greater mixing within the bulk of the bed and resulted in a higher degree of particle wall fouling. Moreover, the extent of wall fouling increased linearly with the increase in gas velocity and as the bed transitioned to turbulent regime, due to the increase in particle-wall contacts. Bipolar charging was observed especially within the wall coating with smaller particles being negatively charged. Overall, particle-wall contacts generated negatively charged particles resulting in a net negative charge in the bed, whereas particle-particle contacts generated positively and negatively charged particles resulting in no net charge when entrainment was negligible. The formation of the wall layer and its extent was influenced by the gravitational and drag forces balancing the image force and Coulomb forces (created by the net charge of the bed and the metallic column wall as the attraction between oppositely charged particles).
Subjects/Keywords: Gas-Solid Fluidization;
Electrostatics;
Particle Wall Coating;
Electrostatic Charge Distribution;
Electrostatic Charge Measurement;
Fluidized Bed Hydrodynamics;
Bubble Size;
Turbulent;
Reactor wall coating mechanism;
Fluidizing particle charging;
Optical Probe
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Song, D. (2017). Study of Electrostatic Charging and Particle Wall Fouling in a Pilot-scale Pressurized Gas-Solid Fluidized Bed up to Turbulent Flow Regime
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/36007
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):
Song, Di. “Study of Electrostatic Charging and Particle Wall Fouling in a Pilot-scale Pressurized Gas-Solid Fluidized Bed up to Turbulent Flow Regime
.” 2017. Thesis, University of Ottawa. Accessed February 27, 2021.
http://hdl.handle.net/10393/36007.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Song, Di. “Study of Electrostatic Charging and Particle Wall Fouling in a Pilot-scale Pressurized Gas-Solid Fluidized Bed up to Turbulent Flow Regime
.” 2017. Web. 27 Feb 2021.
Vancouver:
Song D. Study of Electrostatic Charging and Particle Wall Fouling in a Pilot-scale Pressurized Gas-Solid Fluidized Bed up to Turbulent Flow Regime
. [Internet] [Thesis]. University of Ottawa; 2017. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/10393/36007.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Song D. Study of Electrostatic Charging and Particle Wall Fouling in a Pilot-scale Pressurized Gas-Solid Fluidized Bed up to Turbulent Flow Regime
. [Thesis]. University of Ottawa; 2017. Available from: http://hdl.handle.net/10393/36007
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Arizona State University
6.
Kanhere, Narayan Vishnu.
Optimization of Particle Size of α-Alumina Separator on
Performance of Lithium Ion Batteries.
Degree: Chemical Engineering, 2017, Arizona State University
URL: http://repository.asu.edu/items/44320
► Lithium ion batteries prepared with a ceramic separator, have proven to possess improved safety, reliability as well as performance characteristics when compared to those with…
(more)
▼ Lithium ion batteries prepared with a ceramic
separator, have proven to possess improved safety, reliability as
well as performance characteristics when compared to those with
polymer separators which are prone to thermal runaway. Purely
inorganic separators are highly brittle and expensive. The
electrode-supported ceramic separator permits thinner separators
which are a lot more flexible in comparison. In this work, it was
observed that not any α-alumina could be used by the blade coating
process to get a good quality separator on Li4Ti5O12 (LTO)
electrode. In this work specifically, the effect of particle size
of α-alumina, on processability of slurry was investigated. The
effect of the particle size variations on quality of separator
formation was also studied. Most importantly, the effect of alumina
particle size and its distribution on the performance of LTO/Li
half cells is examined in detail. Large-sized particles were found
to severely limit the ability to fabricate such separators. The
α-alumina slurry was coated onto electrode substrate, leading to
possible interaction between α-alumina and LTO substrate. The
interaction between submicron sized particles of α-alumina with the
substrate electrode pores, was found to affect the performance and
the stability of the separator. Utilizing a bimodal distribution of
submicron sized particles with micron sized particles of α-alumina
to prepare the separator, improved cell performance was observed.
Yet only a specific ratio of bimodal distribution achieved good
results both in terms of separator formation and resulting cell
performance. The interaction of α-alumina and binder in the
separator, and its effect on the performance of substrate electrode
was investigated, to understand the need for bimodal distribution
of powder forming the separator.
Subjects/Keywords: Chemical engineering; Alumina; Bimodal particle size distribution; Energy storage; Inorganic separator; Lithium-ion batteries; Two-step blade coating
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kanhere, N. V. (2017). Optimization of Particle Size of α-Alumina Separator on
Performance of Lithium Ion Batteries. (Masters Thesis). Arizona State University. Retrieved from http://repository.asu.edu/items/44320
Chicago Manual of Style (16th Edition):
Kanhere, Narayan Vishnu. “Optimization of Particle Size of α-Alumina Separator on
Performance of Lithium Ion Batteries.” 2017. Masters Thesis, Arizona State University. Accessed February 27, 2021.
http://repository.asu.edu/items/44320.
MLA Handbook (7th Edition):
Kanhere, Narayan Vishnu. “Optimization of Particle Size of α-Alumina Separator on
Performance of Lithium Ion Batteries.” 2017. Web. 27 Feb 2021.
Vancouver:
Kanhere NV. Optimization of Particle Size of α-Alumina Separator on
Performance of Lithium Ion Batteries. [Internet] [Masters thesis]. Arizona State University; 2017. [cited 2021 Feb 27].
Available from: http://repository.asu.edu/items/44320.
Council of Science Editors:
Kanhere NV. Optimization of Particle Size of α-Alumina Separator on
Performance of Lithium Ion Batteries. [Masters Thesis]. Arizona State University; 2017. Available from: http://repository.asu.edu/items/44320

University of New Mexico
7.
Xu, Yejia.
Spatio-temporally resolved optical laser-induced damage to study defect limited performance of optical films.
Degree: Optical Science and Engineering, 2017, University of New Mexico
URL: https://digitalrepository.unm.edu/ose_etds/60
► Laser-induced damage (LID) limits the performance of optical films and surfaces. Despite intensive study for decades following the invention of laser, the study of…
(more)
▼ Laser-induced damage (LID) limits the performance of optical films and surfaces. Despite intensive study for decades following the invention of laser, the study of LID remains timely and attractive, because for nanosecond laser pulses the LID process is controlled by randomly distributed defects of unknown origin.
Traditional damage tests yield little information about the defects present in optical films and surfaces. These methods record a "yes" or "no" damage result after each test and cannot distinguish the different defects present.
This dissertation focuses on the development of a new kind of laser-induced damage test that measures the actual fluence (intensity) at which damage is initiated in each test. This technique works by identifying the initiation both spatially and temporally. The technique is dubbed Spatially-TEmporally REsolved Optical Laser- Induced Damage (STEREO-LID).
In this dissertation, the use of this new technique to study LID in optical films will be shown. First, it will be shown how the spatial and temporal information is recorded during a single damage event. Second, STEREO-LID will be compared to the ISO standard for damage characterization through a combination of experimental results and Monte Carlo simulations. Third, it will be shown how the statistics of repeated damage fluence measurements can be used to retrieve the defect density
distribution function, which characterizes the areal density of defects in the optical
coating as a function of damage fluence. Finally, the processes that occur after damage initiation and lead to the formation of ablation craters will be explored through modeling of transmission data obtained during STEREO-LID characterization of an optical
coating.
Advisors/Committee Members: Wolfgang Rudolph, Paul Schwoebel, David H. Dunlap, John Bellum.
Subjects/Keywords: laser damage test; optical coating; defect density distribution; laser-induced damage threshold; nanosecond pulse; Other Engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Xu, Y. (2017). Spatio-temporally resolved optical laser-induced damage to study defect limited performance of optical films. (Doctoral Dissertation). University of New Mexico. Retrieved from https://digitalrepository.unm.edu/ose_etds/60
Chicago Manual of Style (16th Edition):
Xu, Yejia. “Spatio-temporally resolved optical laser-induced damage to study defect limited performance of optical films.” 2017. Doctoral Dissertation, University of New Mexico. Accessed February 27, 2021.
https://digitalrepository.unm.edu/ose_etds/60.
MLA Handbook (7th Edition):
Xu, Yejia. “Spatio-temporally resolved optical laser-induced damage to study defect limited performance of optical films.” 2017. Web. 27 Feb 2021.
Vancouver:
Xu Y. Spatio-temporally resolved optical laser-induced damage to study defect limited performance of optical films. [Internet] [Doctoral dissertation]. University of New Mexico; 2017. [cited 2021 Feb 27].
Available from: https://digitalrepository.unm.edu/ose_etds/60.
Council of Science Editors:
Xu Y. Spatio-temporally resolved optical laser-induced damage to study defect limited performance of optical films. [Doctoral Dissertation]. University of New Mexico; 2017. Available from: https://digitalrepository.unm.edu/ose_etds/60
8.
Cavailles, Fanny.
Génération par enrobage à sec de particules composites à propriétés d'usages contrôlées : Production of controlled-property composite particles at by dry particle coating process.
Degree: Docteur es, Génie des Procédés et de l'Environnement, 2016, Ecole nationale des Mines d'Albi-Carmaux
URL: http://www.theses.fr/2016EMAC0018
► L’enrobage à sec par action mécanique permet de formuler des particules composites dont les fonctionnalités et les propriétés physiques, comme l’écoulement, sont améliorées et cela…
(more)
▼ L’enrobage à sec par action mécanique permet de formuler des particules composites dont les fonctionnalités et les propriétés physiques, comme l’écoulement, sont améliorées et cela sans l’ajout de solvant ou de liant. Actuellement la plupart des procédés d’enrobage à sec sont conduits en mode discontinu. L’objectif de ce travail est donc de développer et d’étudier une opération d’enrobage à sec par un procédé continu innovant, une extrudeuse bi-vis corotative sans filière, constituant une rupture technologique dans son domaine. Dans le cadre de ce travail, des sphères de cellulose microcristalline, appelées particules hôtes sont enrobées avec soit des talcs de différentes granulométries soit du stéarate de magnésium, nommées particules invitées. Dans un premier temps, le comportement des particules hôtes est étudié dans le procédé. Les particules sorties du procédé sont analysées par microscopie électronique à balayage, par granulométrie laser et par voluménométrie. Pour la configuration de vis présentant que des éléments de transport, la vitesse de rotation des vis (25 à 200 rpm) et le débit d’alimentation (0,5 à 2 kg/h) choisis influencent le taux de remplissage dans le fourreau, et pour un taux supérieur à environ 14 % : la quantité de particules endommagées est négligeable. Un taux de remplissage faible favorise les frictions particules-particules ou particules-métal au niveau de l’entrefer. L’ajout de zones de mélanges dans la configuration des vis accentue ce phénomène de brisure par l’augmentation des contraintes de cisaillement. Par ailleurs, des masses retenues de la poudre dans le fourreau évoluent linéairement en fonction de la masse de poudre transportée en un tour de vis pour différentes configurations de vis. Ces relations laissent penser à l’existence d’un volume mort. Les mesures de distribution de temps de séjour mettent en évidence par l’application d’un modèle d’association de réacteurs idéaux, la présence d’écoulement piston et d’un volume mort. Dans un second temps, la faisabilité d’une opération d’enrobage à sec par le procédé étudié est analysée. Une couche d’enrobage continu de talc modifiant le comportement hydrophile des particules hôtes, est obtenue pour une vitesse de rotation de vis de 50 rpm et une configuration de vis cisaillante. Le type de particules invitées influence la morphologie de la couche d’enrobage : de type film avec le stéarate de magnésium et de type discret avec le talc micronisé. Néanmoins les propriétés de taille, d’écoulement, de compressibilité des particules composites sont semblables à celle des particules hôtes, seule la propriété de mouillabilité est modifiée. La présence de stéarate de magnésium diminue le temps de séjour des particules dans le procédé grâce à son caractère lubrifiant.
Dry particle coating with mechanical action allows the production of composite particles whose functionalities and physical properties, such as flowability, are improved thanks to the absence of solvent or binder. Currently, most of dry particle coating processes are carried out…
Advisors/Committee Members: Galet, Laurence (thesis director), Chamayou, Alain (thesis director).
Subjects/Keywords: Enrobage à sec; Procédé continu; Extrudeuse bivis corotative; Distribution de temps de séjour; Modification de surface; Ecoulement des poudres; Mélange ordonné; Dry particle coating; Continuous process; Twin screw co-rotating extruder; Residence time distribution; Surface modification; Powder flowability; Ordered mixing; 660.2
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
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to Zotero / EndNote / Reference
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APA (6th Edition):
Cavailles, F. (2016). Génération par enrobage à sec de particules composites à propriétés d'usages contrôlées : Production of controlled-property composite particles at by dry particle coating process. (Doctoral Dissertation). Ecole nationale des Mines d'Albi-Carmaux. Retrieved from http://www.theses.fr/2016EMAC0018
Chicago Manual of Style (16th Edition):
Cavailles, Fanny. “Génération par enrobage à sec de particules composites à propriétés d'usages contrôlées : Production of controlled-property composite particles at by dry particle coating process.” 2016. Doctoral Dissertation, Ecole nationale des Mines d'Albi-Carmaux. Accessed February 27, 2021.
http://www.theses.fr/2016EMAC0018.
MLA Handbook (7th Edition):
Cavailles, Fanny. “Génération par enrobage à sec de particules composites à propriétés d'usages contrôlées : Production of controlled-property composite particles at by dry particle coating process.” 2016. Web. 27 Feb 2021.
Vancouver:
Cavailles F. Génération par enrobage à sec de particules composites à propriétés d'usages contrôlées : Production of controlled-property composite particles at by dry particle coating process. [Internet] [Doctoral dissertation]. Ecole nationale des Mines d'Albi-Carmaux; 2016. [cited 2021 Feb 27].
Available from: http://www.theses.fr/2016EMAC0018.
Council of Science Editors:
Cavailles F. Génération par enrobage à sec de particules composites à propriétés d'usages contrôlées : Production of controlled-property composite particles at by dry particle coating process. [Doctoral Dissertation]. Ecole nationale des Mines d'Albi-Carmaux; 2016. Available from: http://www.theses.fr/2016EMAC0018
9.
Gidlöf, Zandra.
Coating of bioceramic microneedles.
Degree: Pharmacology, 2017, Umeå University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-119007
Subjects/Keywords: bioceramic microneedles; calcium sulfate; coating distribution; release studies; Pharmaceutical Sciences; Farmaceutiska vetenskaper
…scanning electron microscopy.
3.2 Coating formulations
Distribution of 20 µl coatings that was… …demonstrated that when different coating formulations are applied to CaS MNs,
the distribution of the… …substantially affect the coating distribution on the MNs. There is still a lot of
research needed… …substantial work
to develop proper MN coating processes (11).
In terms of approved MNs so… …x28;11). Coating the MNs or incorporating substances into the MNs also give the…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gidlöf, Z. (2017). Coating of bioceramic microneedles. (Thesis). Umeå University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-119007
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):
Gidlöf, Zandra. “Coating of bioceramic microneedles.” 2017. Thesis, Umeå University. Accessed February 27, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-119007.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gidlöf, Zandra. “Coating of bioceramic microneedles.” 2017. Web. 27 Feb 2021.
Vancouver:
Gidlöf Z. Coating of bioceramic microneedles. [Internet] [Thesis]. Umeå University; 2017. [cited 2021 Feb 27].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-119007.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gidlöf Z. Coating of bioceramic microneedles. [Thesis]. Umeå University; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-119007
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Georgia Tech
10.
Zhu, Qunzhi.
Modeling and Measurements of the Bidirectional Reflectance of Microrough Silicon Surfaces.
Degree: PhD, Mechanical Engineering, 2004, Georgia Tech
URL: http://hdl.handle.net/1853/5062
► Bidirectional reflectance is a fundamental radiative property of rough surfaces. Knowledge of the bidirectional reflectance is crucial to the emissivity modeling and heat transfer analysis.…
(more)
▼ Bidirectional reflectance is a fundamental radiative property of rough surfaces. Knowledge of the bidirectional reflectance is crucial to the emissivity modeling and heat transfer analysis. This thesis concentrates on the modeling and measurements of the bidirectional reflectance for microrough silicon surfaces and on the validity of a hybrid method in the modeling of the bidirectional reflectance for thin-film coated rough surfaces.
The surface topography and the bidirectional reflectance
distribution function (BRDF) of the rough side of several silicon wafers have been extensively characterized using an atomic force microscope and a laser scatterometer, respectively. The slope
distribution calculated from the surface topographic data deviates from the Gaussian
distribution. Both nearly isotropic and strongly anisotropic features are observed in the two-dimensional (2-D) slope distributions and in the measured BRDF for more than one sample. The 2-D slope
distribution is used in a geometric-optics based model to predict the BRDF, which agrees reasonably well with the measured values. The side peaks in the slope
distribution and the subsidiary peaks in the BRDF for two anisotropic samples are attributed to the formation of {311} planes during chemical etching. The correlation between the 2-D slope
distribution and the BRDF has been developed.
A boundary integral method is applied to simulate the bidirectional reflectance of thin-film coatings on rough substrates. The roughness of the substrate is one dimensional for simplification. The result is compared to that from a hybrid method which uses the geometric optics approximation to model the roughness effect and the thin-film optics to consider the interference due to the
coating. The effects of the film thickness and the substrate roughness on the validity of the hybrid method have been investigated. The validity regime of the hybrid method is established for silicon dioxide films on silicon substrates in the visible wavelength range.
The proposed method to characterize the microfacet orientation and to predict the BRDF may be applied to other anisotropic or non-Gaussian rough surfaces. The measured BRDF may be used to model the apparent emissivity of silicon wafers to improve the temperature measurement accuracy in semiconductor manufacturing processes. The developed validity regime for the hybrid method can be beneficial to future research related to the modeling for thin-film coated rough surfaces.
Advisors/Committee Members: Dr. Zhuomin Zhang (Committee Chair), Dr. Andrei G. Fedorov (Committee Member), Dr. Andrew F. Peterson (Committee Member), Dr. Dennis W. Hess (Committee Member), Dr. J. Robert Mahan (Committee Member).
Subjects/Keywords: Light Scattering; Slope distribution; Thin-film coating; Rough surface; AFM; BRDF; Thin films Testing; Silicon Testing; Reflectance; Light Scattering
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhu, Q. (2004). Modeling and Measurements of the Bidirectional Reflectance of Microrough Silicon Surfaces. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/5062
Chicago Manual of Style (16th Edition):
Zhu, Qunzhi. “Modeling and Measurements of the Bidirectional Reflectance of Microrough Silicon Surfaces.” 2004. Doctoral Dissertation, Georgia Tech. Accessed February 27, 2021.
http://hdl.handle.net/1853/5062.
MLA Handbook (7th Edition):
Zhu, Qunzhi. “Modeling and Measurements of the Bidirectional Reflectance of Microrough Silicon Surfaces.” 2004. Web. 27 Feb 2021.
Vancouver:
Zhu Q. Modeling and Measurements of the Bidirectional Reflectance of Microrough Silicon Surfaces. [Internet] [Doctoral dissertation]. Georgia Tech; 2004. [cited 2021 Feb 27].
Available from: http://hdl.handle.net/1853/5062.
Council of Science Editors:
Zhu Q. Modeling and Measurements of the Bidirectional Reflectance of Microrough Silicon Surfaces. [Doctoral Dissertation]. Georgia Tech; 2004. Available from: http://hdl.handle.net/1853/5062
.