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Dissertations / Theses on the topic 'Microstructural and thermal Properties'

Author: Grafiati

Published: 7 June 2025

Last updated: 16 July 2025

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1

Fon, Warren Chung Wah Cross Michael Clifford. "Thermal properties of nano- and microstructures /." Diss., Pasadena, Calif. : California Institute of Technology, 2004. http://resolver.caltech.edu/CaltechETD:etd-05262004-123035.

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2

Appiah, Kwadwo Ampofo. "Microstructural and microanalytical characterization of laminated (C-SiC) matrix composites fabricated by forced-flow thermal-gradient chemical vapor infiltration (FCVI)." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/14910.

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3

Turetta, Alberto. "Investigation on thermal, mechanical and microstructural properties of quenchenable high strenght steels in hot stamping operations." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425096.

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Sheet metal working operations at elevated temperature have gained in the last years even more importance due to the possibility of producing parts characterized by high strength-to-mass ratio. In particular, the hot stamping of ultra high strength quenchenable steels is nowadays widely used in the automotive industry to produce body-in-white structural components with enhanced crash resistance and geometrical accuracy. The optimization of the process, where deformation takes place simultaneously with cooling, and of the final component performances requires the utilization of FE-based codes w

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4

Garcia, de la Cruz Lucia. "Ultrafine grained nickel processed by powder metallurgy : microstructure, mechanical properties and thermal stability." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMC224.

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La synthèse par métallurgie des poudres de nickel à grains ultrafins (UFG) a été effectuée, et l’effet de l’affinement de la microstructure sur le comportement mécanique et les propriétés physiques a été étudié. La possibilité de coupler le broyage et le frittage flash est étudiée avec des résultats prometteurs. Des échantillons de haute densité avec des tailles de grains d = 0.65 – 4 µm, caractérisés par une fraction élevée des joints de grains Σ3 et un faible niveau de contrainte ont été synthétisés. Les propriétés mécaniques des échantillons UFG montrent une bonne combinaison ductilité-rési

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5

Mathevon, Alexandre. "Characterization and modelling of microstructural evolutions and mechanical properties during the thermal treatments of Dual-Phase steels." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI120.

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L'objectif de cette thèse était de contribuer au développement et à la compréhension des phénomènes physiques pilotant les évolutions microstructurales et les propriétés mécaniques des aciers Dual-Phase. Dans un souci d'utilisation sur les lignes de production industrielle, le développement d'outils numériques à champ moyen a été retenu, utilisables pour une large gamme de compositions chimiques et de cycle thermique. Une calibration des modèles sur des aciers ternaires provenant de coulées de laboratoire a été effectuée avant leur validation sur deux nuances industrielles. Un modèle de prédic

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6

Noferesti, Amir Darabi. "Microstructural Characteristics and Mechanical Behavior of Anticorrosive Al-Zn Thermal Spray Coatings Deposited by Wire Arc Spraying and Cold Spraying Techniques." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31645.

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Mechanical properties of thermal spray deposited coatings are highly influenced by their microstructural characteristics. The objective of this investigation is to evaluate the mechanical properties of thermally sprayed coatings consisted of aluminum and zinc based on the coating microstructure, using an image based computational scheme. Microstructural images of coating samples were subjected to image-based finite element analysis and the results were validated by experimental tests and analytical models. Comparison of the experimental data with FEA was used to explain the microstructural bas

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7

Ramacieri, Patricia. "Microstructure and kinetics of thermal degradation of alkene copolymers of vinyl chloride." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72819.

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8

Tanrikulu, Ahmet Alptug. "Microstructure and Mechanical Properties of Additive Manufacturing Titanium Alloys After Thermal Processing." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/4088.

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Titanium alloys are widely used for aerospace and biomaterial applications since their high specific strength, and high corrosion resistivity. Besides these properties, titanium is an excellent biocompatible material widely used for internal body implants. Because the products have complex geometries in both applications, Additive Manufacturing (AM) methods have been recently applied for production. AM methods can process a direct 3-D shape of the final product, decrease total production time and cost. However, high residual stress of the final product limits the application of AM components,

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9

Apreutesei, Mihai. "Temperature impact on thermal evolution of advanced PVD ceramic and metallic glass thin films : Physico-chemical and microstructural analysis." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0009/document.

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Ces dernières années, les exigences de l'industrie dans le développement de nouveaux matériaux fonctionnels en mesure de résister aux conditions difficiles pendant l'opération d'usinage sont en constante augmentation. Les chercheurs doivent donc trouver de nouvelles solutions pour répondre aux besoins industriels de plus en plus sévères. L’utilisation de revêtement protecteur à la surface de l’outil de coupe est une solution très efficace. Des nouveaux matériaux architecturés sont étudiés pour leurs propriétés mécaniques, physiques et chimiques uniques assurant une résistance aux dégradations

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10

Oo, Zeya. "Characterization of thermal stability, microstructures and properties of Al2TiO5 - and Ti3SiC2- based ceramics." Thesis, Curtin University, 2013. http://hdl.handle.net/20.500.11937/2514.

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The focus of this thesis was to study the thermal stability of Al2TiO5- and Ti3SiC2-based ceramics, and the oxidation characteristics of Ti3SiC2 through in-situ x-ray and neutron diffraction. The decomposition behaviour of Al2TiO5 in controlled atmospheres was studied in the temperature range of 20–1400°C. Al2TiO5 decomposed at 1100°C but reformed at 1350°C. In vacuum or argon, Ti3SiC2 decomposed to TiCx and Ti5Si3Cx above 1200°C. In air, Ti3SiC2 oxidized to anatase at 600°C, and formed an outer layer of rutile at 750°C and an inner mixed layer of rutile and cristobalite at 1350°C. Tridymite f

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11

Whittaker, A. J. "Thermal transport properties and microstructure of a series of carbon/carbon fibre composites." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375729.

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12

Iqbal, Sardar S. "IMPACT OF HEAT TREATMENT AND OXIDATION OF C/C COMPOSITES ON MICROSTRUCTURE AND PHYSICAL PROPERTIES." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/dissertations/430.

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Carbon-carbon (C/C) composites are notable among engineering materials in aerospace and defense industries possessing excellent specific mechanical, thermal, frictional and wear properties. C/C maintain their properties at temperatures where most of the high end alloys give in, and maintain their dimensional stability at temperatures above 2000 oC. C/C is frequently used in aircraft and automotive industries as brake materials. However, frictional performance is dependent on various parameters: microstructure, fiber type, fiber orientation distribution, fiber/matrix interfacial bond, heat trea

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13

Liang, Xin. "Structure and Thermoelectric Properties of ZnO Based Materials." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11191.

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The present dissertation investigates the relationship between the structure and thermoelectric properties of ZnO based materials, with a focus on trivalent element doping on engineering the microstructure and altering the electrical and thermal transport properties. Within the solubility range, the addition of trivalent elements, such as In3+, Fe3+ and Ga3+, is observed to increase the electrical conductivity of ZnO and decrease the thermal conductivity.<br>Engineering and Applied Sciences

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14

Nguyen, Truong Thi. "Numerical modeling of microstructure-properties relationships of refractories : micro-mechanical approach with the discrete element method." Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0089/document.

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Cette thèse avait pour objectif d’étudier les relations entre la microstructure de matériaux réfractaires et leurs propriétés thermomécaniques afin d’améliorer leur résistance aux chocs thermiques. En particulier, des modélisations numériques ont été réalisées afin de mieux comprendre la conception de la microstructure liée à des endommagements dus au différentiel de dilatation thermique. A cette fin, des résultats expérimentaux de matériaux simplifiés ont été utilisés comme référence pour l’approche numérique. Afin d’obtenir des résultats quantitatifs des phénomènes d’endommagement complexes,

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15

Abdul-Hussain, Najlaa. "Experimental Study on the Engineering Properties of Gelfill." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19852.

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Gelfill (GF) is made of tailings, water, binder and chemical additives (Fillset, sodium silicate gel). The components of GF are combined and mixed on the surface and transported (by gravity and/or pumping) to the underground mine workings, where the GF can be used for both underground mine support and tailings storage. Thermal (T), hydraulic (H), and mechanical (M) properties are important performance criteria of GF. The understanding of these engineering properties and their evolution with time are still limited due to the fact that GF is a new cemented backfill material. In this thesis, th

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16

Amirsardari, Z., and M. Salavati-Niasari. "Study on Microstructure and Ablation Properties of Graphene Oxide/Zirconium Diboride Nanoparticle/Carbon Fiber/Resol Nanocomposites." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42604.

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.<br>The development of compatible additives for hot corrosion inhibition in high temperature application requires test methods which yield significant results on a short time scale. The present study aims at the evaluation of the effect of hot corrosion inhibiting model additives on the performance of an ablative phenolic resin using oxy-acetylene torch test which measure different properties. Thermogravimetric analysis (TGA) and field‐emission scanning electron microscopy (FESEM) in combination with energy disperse Xray (EDX) are used. Two kinds of corrosion inhibiting additives are employed

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17

Taina, Fabio. "Optimisation of microstructure and fatigue properties of Inconel 718 for extrusion die applications." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0087/document.

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Ce travail est une contribution à une étude de recherche et développent, proposée par Hydro Aluminium, dans le domaine des mécanismes d'endommagement de filières d'extrusion et. L'originalité du travail de thèse est basée sur le développement d'un alliage Inconel 718 optimisé pour l'application spécifique de filière d’extrusion, ce qui représente un saut technologique dans l'emploi de ce superalliage dans le domaine des outils. L'impact des paramètres du procédé d'extrusion, appelés paramètres extrinsèques, - tels que la vitesse d'extrusion, la longueur de billette, le chargement thermo-mécani

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18

Engkvist, Gustav. "Investigation of microstructure and mechanical properties of 3D printed Nylon." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66304.

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This thesis presents a multiscale investigation and characterization of additive manufactured Polyamide material using fused deposition modelling technique. Manufacturing was performed using Markforgeds – Mark one 3D printer. A multiscale investigation dedicated to minimizing the effect of shape distortion during 3D printing are presented, focusing on both molecular alignment in microstructure and implementing internal structures in mesostructure. Characterization on samples investigating microstructure was performed with coefficient of linear thermal expansion measurement and 3-point bending

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19

Huang, Dong Fang. "Investigation of Heterogeneity of FSW Inconel 718 Coupled with Welding Thermal Cycle." BYU ScholarsArchive, 2008. https://scholarsarchive.byu.edu/etd/1914.

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In order to develop a better understanding of the property, microstructure evolution and thermal history of FSW Inconel 718's, the strain, strain rate and thermal cycles need to be determined. In order to estimate the strain field of a deformed body, a displacement function needs to be determined. A 3D deformation model was developed to determine the displacement coefficients. A rectangular box created in this model deforms following a linear displacement function. Three orthogonal planes cut this deformed box, which leads to three deformed planes. The shape parameters (L, H, θ¹ and θ²) on the

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20

Luo, Yinyan. "Thermal evolution of microstructure and magnetic properties of melt-spun Fe₇₃₅̣Cr₅V₂Mn₀₅̣P₁₃C₅Si₁ (at.%) alloy /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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21

Mouiya, Mossaab. "Thermomechanical properties of refractory materials, influence of the diffuse microcracking." Electronic Thesis or Diss., Limoges, 2024. http://www.theses.fr/2024LIMO0066.

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Les matériaux réfractaires sont largement utilisés dans les applications à haute température mais ne sont pas toujours enclins à résister aux chocs thermiques sévères. Pour résoudre ce problème, une microstructure incorporant des microfissures préexistantes est une solution bien connue pour améliorer la résistance aux chocs thermiques. Néanmoins, une telle microstructure endommagée nécessite une meilleure compréhension pour optimiser son design sans compromettre l'intégrité du matériau. Dans un tel contexte, le Titanate d'Aluminium (Al₂TiO₅, AT) présentant une forte anisotropie de dilatation t

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22

Chen, Guang. "An investigation into nano-particulates reinforced SAC305-based composite solders under electro- and thermo-migration conditions." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/27576.

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With the rapid development in electronic packaging due to product miniaturisation, the size of solder joints is decreasing considerably, thus the failure of solder interconnects induced by electro-migration (EM) and thermo-migration (TM) became a reliability concern. The incorporation of foreign reinforcement can effectively improve properties of the solder alloys. However, this presents an imperative need for a further investigation to elaborate the underlying fundamentals associated with the reliability of reinforced solders. In this study, the Sn-Ag-Cu (SAC) based solder alloy powders as ma

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23

Beckius, Fredrik, and Robin Gustafsson. "Connecting casting simulation and FE software including local variation of physical properties. : Investigation on local material properties and microstructure in a grey iron cylinder head." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Material och tillverkning, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31248.

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24

FUSCO, ALEXANDRE G. "Estudo da influência do zircônio e gálio nas propriedades magnéticas e na microestrutura dos imãs permanentes à base de praseodímio." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11453.

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Made available in DSpace on 2014-10-09T12:52:04Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:58:08Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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25

Perret, Anouk. "Méthodologie de caractérisation microstructurale 3D de matériaux poreux structurés pour la thermique." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0042/document.

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Depuis 30 ans, les exigences règlementaires en matière d’isolation thermique des bâtiments augmentent sans cesse. Pour mieux isoler, et conserver la surface habitable et la valeur patrimoniale, il est nécessaire d’augmenter les performances des isolants thermiques. Si les meilleurs systèmes classiques d’isolant atteignent désormais des conductivités thermiques proches de 30 mW/(m.K), les matériaux supers isolants à pression atmosphérique affichent moins de 18 mW/(m.K) et sont à base d’aérogels de silice. Cette matière première doit ses excellentes performances thermiques, à d’une part la taill

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26

Wang, Tao [Verfasser], Alexander [Akademischer Betreuer] Hartmaier, and Robert [Akademischer Betreuer] Vaßen. "Large-scale molecular dynamics simulation of growth, microstructure and properties of thermal-sprayed coatings / Tao Wang. Gutachter: Alexander Hartmaier ; Robert Vaßen." Bochum : Ruhr-Universität Bochum, 2016. http://d-nb.info/1082425729/34.

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27

Wang, Yu. "Mechanical properties and microstructure of laser sintered and starch consolidated iron-based powders." Doctoral thesis, Karlstad : Faculty of Technology and Science, Materials Engineering, Karlstads universitet, 2008. http://www.diva-portal.org/kau/abstract.xsql?dbid=1593.

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28

Wang, Yachao. "Microstructure and Mechanical Properties of Laser Additively Manufactured Nickle based Alloy with External Nano Reinforcement: A Feasibility Study." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535703630944044.

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29

LATTANZI, LUCIA. "Influence of alloying elements and melt treatments on microstructure and mechanical properties of the AlSi7Mg alloy." Doctoral thesis, Università degli studi di Ferrara, 2020. http://hdl.handle.net/11392/2488242.

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During the last decades, the employment of AlSi7 cast alloys in the automotive industry has significantly improved because vehicles result lighter and more eco-friendly. Thus it is crucial to increase the knowledge about the properties of such alloys in order to optimise them through precise control of chemical composition, well-performed melt treatments and tailored heat treatments. The present work focuses on the influence of alloying elements and melt treatments on microstructure and mechanical properties of the AlSi7Mg alloy. The main alloying elements involved in the AlSi7Mg systems are m

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30

MARINUCCI, GERSON. "Desenvolvimento, fabricacao e analise de falha e fratura de cilindros de fibra de carbono colapsados por pressao interna." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10913.

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31

Tang, Fei. "The Microstructure-Processing-Property Relationships in an Al Matrix Composite System Reinforced by Al-Cu-Fe Alloy Particles." Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/835313-syGDu9/webviewable/.

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32

YANG, WENSHU. "Preparation, microstructure, mechanical and thermophysical properties of short carbon fibre/SiC multilayer composites by tape casting and pressureless sintering." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2506207.

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Silicon carbide multilayer composites containing short carbon fibres (Csf/SiC) were prepared by tape casting and pressureless sintering. The short C fibres were firstly dispersed in solvents with the aid of dispersant and then mixed with SiC slurry to limit fibre breakage. The relative densities, mechanical properties, oxidation behavior of Csf/SiC multilayer composites were evaluated. Thermal expansion, diffusivity and conductivity behavior in three directions were tested. The effect of addition of short C fibres on shrinkage, mechanical and thermophysical behavior was discussed. Triton X100

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Mukherjee, Sriparna. "Evolution of microstructure and residual stress in disc-shape EB-PVD thermal barrier coatings and temperature profile of high pressure turbine blade." Master's thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4989.

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A detailed understanding of failure mechanisms in thermal barrier coatings (TBCs) can help develop reliable and durable TBCs for advanced gas turbine engines. One of the characteristics of failure in electron beam physical vapor deposited (EB-PVD) TBCs is the development of instability, named rumpling, at the interface between (Ni, Pt)Al bond coat and thermally grown oxide (TGO). In this study, thermal cycling at 1100[degrees]C with 1 hr dwell time was carried out on 25.4mm disc specimens of TBCs that consisted of EB-PVD coated ZrO[sub2]-7wt.%Y[sub2]O[sub3], (Pt,Ni)Al bond coat, and CMSX-4 Ni-

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34

Xing, Zhi. "Influence de la nature minéralogique des granulats sur leur comportement et celui du béton à haute température." Phd thesis, Université de Cergy Pontoise, 2011. http://tel.archives-ouvertes.fr/tel-00624785.

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Le béton est un matériau de construction omniprésent dans les ouvrages de génie civil en raison de sa facilité de mise en oeuvre et son faible coût économique. Suite à des incendies de tunnels ou de bâtiments, les structures en béton peuvent présenter d'importantes dégradations. Afin de pouvoir concevoir des ouvrages plus sûrs il s'avère nécessaire de comprendre les phénomènes physiques à l'origine des désordres dans les structures en béton portées à température élevée. Les travaux de recherche de cette thèse permettent de compléter les connaissances déjà acquises sur le comportement du béton

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35

Qiao, Jichao. "Propriétés mécaniques des verres métalliques massifs : Influence de la microstructure." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0008.

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Ce travail a porté sur l’étude des propriétés thermiques et mécaniques des verres métalliques massifs. Dans le premier chapitre nous avons rappelé l’historique des verres métalliques massifs, leurs propriétés intéressantes et quelques applications de ces matériaux et nous les avons situés par rapport aux autres matériaux amorphes, tels que les polymères ou les verres d’oxydes. Nous avons analysé par différentes méthodes expérimentales (calorimétrie, analyse mécanique dynamique, diffraction des rayons X, microscopies électroniques) les caractéristiques de cette évolution et leur incidence sur l

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De, Marcos Anthony. "Influence du procédé de coulage-congélation sur la microstructure et les propriétés de matériaux." Thesis, Limoges, 2014. http://www.theses.fr/2014LIMO0027/document.

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Au cours de ce travail, l’objectif est d’étudier les liens entre les paramètres du procédé de séchage, la microstructure et les propriétés d’usage du matériau telles que la conductivité thermique et le module d’Young. L’étude a été effectuée sur des matériaux poreux à base d’alumine, oxyde modèle, et à base de bentonite, minéral argileux. Le procédé de séchage utilisé est le procédé de coulage-congélation, qui permet d’obtenir une microstructure orientée et de fabriquer des matériaux anisotropes. L’origine de cette anisotropie provient de la microstructure des échantillons, essentiellement la

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Straubel, Ariane. "Gefüge-Eigenschaftsbeziehung einer TiAl-Legierung mit Oxidationsschutz und Wärmedämmschicht." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-224085.

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Etwa 27000 Flugzeuge durchqueren täglich den Luftraum über Europa. Dieser weiter steigende Flugverkehr erfordert neue Richtlinien für die Luftfahrzeuge. Im Besonderen stehen CO2- und NOX-Emission, Kerosinverbrauch und Lärmbelastung unter Optimierungsbedarf. Diese Anforderungen wurden bis 2050 vom Advisory Council for Aerospace Research in Europe (kurz: ACARE) festgelegt und werden wissenschaftlich unterstützt [3, 4]. Um diese Ziele zu erreichen, gibt es verschiedene Forschungsprogramme, Clean Sky ist ein EU-Technologieprogramm davon. In diesem Projekt werden sechs Demonstrator-Programme entwic

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Vilaplana, Francisco. "Modelling the degradation processes in high-impact polystyrene during the first use and subsequent recycling." Licentiate thesis, Stockholm : Institutionen för fiber- och polymerteknologi, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4407.

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Angelin, Andressa Fernanda 1989. "Concreto leve estrutural : desempenhos físicos, térmicos, mecânicos e microestruturais." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267702.

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Orientadores: Luísa Andréia Gachet Barbosa, Rosa Cristina Cecche Lintz<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Tecnologia<br>Made available in DSpace on 2018-08-24T22:32:15Z (GMT). No. of bitstreams: 1 Angelin_AndressaFernanda_M.pdf: 3316470 bytes, checksum: e0844bd6dbe8b1d62eefa5eec0498b83 (MD5) Previous issue date: 2014<br>Resumo: A busca por materiais alternativos, de baixa massa específica, que possua redução na transferência de propagação de calor, associado à facilidade de manuseio e aplicação em concretos estruturais e estruturas de vedação, represe

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Ibrahim, Dorra. "Synthèse et caractérisation de matériaux à base de SnTe pour la conversion d’énergie par effets thermoélectriques." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0137/document.

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Les alliages de tellurure de plomb (PbTe) sont reconnus depuis longtemps comme d’excellents matériaux thermoélectriques avec un ZT de l’ordre de 1,0 pour des applications en génération d’électricité à hautes températures où le tellurure de bismuth (Bi2Te3) ne peut plus être utilisé. Cependant, la présence de plomb rend problématique une commercialisation à grande échelle de dispositifs thermoélectriques contenant ce composé. Le tellurure d’étain (SnTe), étudié il y a plus de 40 ans comme un analogue à PbTe, présente des performances thermoélectriques médiocres du fait de la présence d’une conc

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41

Li, Fang. "Microstructural properties of semiconductor nanostructures." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:396024e1-a646-40ca-8212-cad925b18311.

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Semiconductor nanostructures have attracted great interest owing to their unique physical properties and potential applications in nanoscale functional devices. The enhancement of the physical properties of semiconductor nanostructures and their performance in devices requires a deeper understanding of their fundamental microstructural properties. Thus this thesis is focused on the experimental and theoretical studies of the microstructural properties of two important semiconductor nanostructures: axial heterostructured silicon nanowires with varying doping and indium nitride colloidal nanopar

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Sani, Rababe. "Étude des transformations microstructurales de mélanges argile/Combustibles Solides de Récupération (CSR) lors de la cuisson : relations entre propriétés physico-chimiques, mécaniques et thermiques." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2018. http://www.theses.fr/2018EMAC0005/document.

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La valorisation des co-produits riches en matières organiques et inorganiques comme additifs dans des formulations à base d’argile peut améliorer à la fois les performances mécaniques et thermiques des produits de terre cuite, de même que le bilan énergétique des procédés de fabrication de ces matériaux. Cette étude a porté sur l’incorporation de combustibles solides de récupération (CSR) dans un mélange de fabrication des produits de terre cuite pour le génie civil en étroite collaboration avec l’entreprise TERREAL dans le cadre du projet LabCom RESPECTc financé par l’ANR.Premièrement, deux C

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Joshi, Sameehan Shrikant. "Non-Isothermal Laser Treatment of Fe-Si-B Metallic Glass." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1062821/.

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Metallic glasses possess attractive properties, such as high strength, good corrosion resistance, and superior soft magnetic performance. They also serve as precursors for synthesizing nanocrystalline materials. In addition, a new class of composites having crystalline phases embedded in amorphous matrix is evolving based on selective crystallization of metallic glasses. Therefore, crystallization of metallic glasses and its effects on properties has been a subject of interest. Previous investigations from our research group related to laser assisted crystallization of Fe-Si-B metallic glass (

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Šafaříková, Hana. "Vliv obsahu kalcitu v cihlářských zeminách na vlastnosti vypáleného střepu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225878.

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This master´s thesis is focused on the use of primary raw materials (clays) in the brick manufacturing. These soils differ mainly CaO contect and it most often in the form of calcite. Diversity of soils is manifested primarily in the mineralogical composition after firing and the existence of anorthite in the calcium clays. In the practical part I am trying to define the optimal type of soil suitable for the production of masonry units.

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Ibrahim, Dorra. "Synthèse et caractérisation de matériaux à base de SnTe pour la conversion d’énergie par effets thermoélectriques." Electronic Thesis or Diss., Université de Lorraine, 2018. http://www.theses.fr/2018LORR0137.

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Les alliages de tellurure de plomb (PbTe) sont reconnus depuis longtemps comme d’excellents matériaux thermoélectriques avec un ZT de l’ordre de 1,0 pour des applications en génération d’électricité à hautes températures où le tellurure de bismuth (Bi2Te3) ne peut plus être utilisé. Cependant, la présence de plomb rend problématique une commercialisation à grande échelle de dispositifs thermoélectriques contenant ce composé. Le tellurure d’étain (SnTe), étudié il y a plus de 40 ans comme un analogue à PbTe, présente des performances thermoélectriques médiocres du fait de la présence d’une conc

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46

Zacharia, Nicole S. B. Massachusetts Institute of Technology. "Thermal imaging of quenched microstructural evolution in steel alloys." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/118566.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2001.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 41).<br>A method was devised for quenching undercooled samples of Fe-12Cr-16Ni. The samples were levitated in a magnetic field as a way of containerless processing. They were dropped onto a nucleation trigger and then into a quenching bath. This process was successful in producing quenched samples , but the layer of In-Ga wetting their surface showed problematic in the analysis of the samples. Data show

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Li, Ju 1975. "Modeling microstructural effects of deformation resistance and thermal conductivity." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/46283.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2000.<br>Includes bibliographical references (p. 344-360).<br>This is a study of the microstructural influences on thermo-mechanical behavior of selected metals and ceramics using computer simulation, with original contributions in both theoretical and applied aspects. There are three major thrusts. First, by constructing a many-body empirical potential for ZrCx and then carrying out MD simulations to calculate its lattice thermal conductivity, I obtain the first quantitative evidence ever that the vibrational

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Ndamka, Ngunjoh Lawrence. "Microstructural damage of thermal barrier coatings due to CMAS." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/8452.

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Over recent years, due to a constant desire for higher efficiency engines and hence increased turbine entry temperatures and a proportional reduction in [Carbon dioxide] emissions, there is a need to understand how molten slags (CMAS: Calcia magnesia alumina-silicate), including volcanic ash, affect engine life. Thermal barrier coatings (TBC) are employed together with cooling technology to protect engine hardware from the high temperature seen within the turbine and combustion zones. At current operating temperatures, CMAS can adhere to the TBC surface resulting in premature degradation of th

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Cormier, Joseph Michael. "Microstructural and Mechanical Properties of Human Ribs." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/10137.

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The direction of osteons in cortical bone has been shown to be well correlated with the strongest loading direction of the bone as a whole. Therefore, determining the orientation of osteons in the rib cage is an important step in understanding the behavior of the rib cage under mechanical load. A total of 37 specimens were removed from several rib locations from a male and female cadaver. Eight histological slides were created from each 5 mm long section. Image analysis included the use of a computer algorithm created in Matlab to track the center of each osteon throughout the rib section. Ana

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Blivi, Adoté Sitou. "Effet de taille dans les polymères nano-renforcés : caractérisation multi-échelles et modélisation." Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2431/document.

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Le travail présenté dans ce document vise à mettre en évidence et à comprendre l'effet de la taille nanométrique des renforts sur les propriétés des nanocomposites avec une approche expérimentale. Des nanocomposites de PMMA et particules de silice (15nm, 25nm, 60nm, 150nm et 500nm) de fractions volumiques 2 0/0, 40/0 et 6 0/0 ont été fabriqués. Des analyses multi-échelles (MET et DRX-WAXS) ont montré que les paramètres caractéristiques de la microstructure des nanocomposites varient avec la taille des nanoparticules. En effet, la diminution de la taille des nanoparticules à fraction volumique

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