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Dissertations / Theses on the topic 'Carbide system'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Diaz-Botia, Camilo Andres. "Silicon Carbide Technologies for Interfacing with the Nervous System." Thesis, University of California, Berkeley, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10601720.

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<p> In the past couple of decades we have seen remarkable advances in the integration of biological systems with artificial ones. Our knowledge of both of these worlds has grown exponentially, and in particular our knowledge of the human body. In recent years we have been able to understand and treat diseases we never thought we would, and we have even been able to interface with the body to restore lost functions. Direct interaction with the human brain to read and write information to it has been achieved thanks to the development of neural probes. The work presented in this thesis focused o

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2

Brown, Peter William. "Chemical vapor deposition of silicon carbide in the methyltrichlorosilane-hydrogen system /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487844485899111.

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3

Neyman, Elizabeth. "Improvement in Adhesion for the Epoxy-SiC System via Plasma and Silane Surface Modification Techniques." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34490.

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<p>The adhesion durability of coatings and encapsulant materials utilized in electronic packaging is vital for device reliability in the microelectronics industry. Due to adverse operating conditions such as high moisture and high temperature environments, the adhesion between an adhesive and its substrate is typically compromised. This thesis addresses the advantages of employing plasma pretreatments and surface derivatization using silane coupling agents as surface modification techniques in an effort to enhance the adhesive bonding of epoxy to SiC coated Si wafers (SiC/Si). Durability wa

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4

Coletti, Camilla. "Silicon Carbide Biocompatibility, Surface Control and Electronic Cellular Interaction for Biosensing Applications." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002285.

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5

Fallier, William F. (William Frederick). "Analysis of system wide distortion in an integrated power system utilizing a high voltage DC bus and silicon carbide power devices." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39730.

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Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.<br>Includes bibliographical references (p. 81-82).<br>This research investigates the distortion on the electrical distribution system for a high voltage DC Integrated Power System (IPS). The analysis was concentrated on the power supplied to a propulsion motor driven by an inverter with simulated silicon carbide switches. Theoretically, silicon carbide switches have the advantage of being able t

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Fallier, William F. "Analysis of system wide distortion in an integrated power system utilizing a high voltage DC bus and silicon carbide power devices." Thesis, Monterey, California. Naval Postgraduate School, 2007. http://hdl.handle.net/10945/3006.

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This research investigates the distortion on the electrical distribution system for a high voltage DC Integrated Power System (IPS). The analysis was concentrated on the power supplied to a propulsion motor driven by an inverter with simulated silicon carbide switches. Theoretically, silicon carbide switches have the advantage of being able to withstand a very large blocking voltage and carry very large forward currents. Silicon carbide switches are also very efficient due to their quick rise and fall times. Since silicon carbide switches can withstand high voltage differentials and switch fas

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7

Owens, Walten. "Aero-Thermal Characterization Of Silicon Carbide Flexible Tps Using A 30kw Icp Torch." ScholarWorks @ UVM, 2015. http://scholarworks.uvm.edu/graddis/363.

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Flexible thermal protection systems are of interest due to their necessity for the success of future atmospheric entry vehicles. Current non-ablative flexible designs incorporate a two-dimensional woven fabric on the leading surface of the vehicle. The focus of this research investigation was to characterize the aerothermal performance of silicon carbide fabric using the 30 kW Inductively Coupled Plasma Torch located at the University of Vermont. Experimental results have shown that SiC fabric test coupons achieving surface temperatures between 1000°C and 1500°C formed an amorphous silicon dio

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8

Scardelletti, Maximilian C. "DEVELOPMENT OF A HIGH TEMPERATURE SILICON CARBIDE CAPACITIVE PRESSURE SENSOR SYSTEM BASED ON A CLAPP-TYPE OSCILLATOR CIRCUIT." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1467112012.

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9

Blackham, Benjamin Luke. "The development of a binder system and process for the manufacture of large diameter tungsten carbide drill blanks." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5592/.

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A novel extrusion binder system was developed to enable the manufacture of tungsten carbide drill blanks greater than I 4 mm in sintered cross-sectional diameter at Sandvik Hard Materials Coventry. The binder system comprised primarily of methyl cellulose and water, which was capable of being removed from the extrudate with no adverse effects on extrudate quality or increases in drying and de-binding times. The tungsten carbide feedstock was prepared by z-blade mixing on laboratory, pilot and production plant scales. Extrudates were manufactured either as solid cylindrical rods or as rods form

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10

Ralston, Parrish Elaine. "Design and Verification of a High Voltage, Capacitance Voltage Measurement System for Power MOSFETs." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/36169.

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There is a need for a high voltage, capacitance voltage (HV, CV) measurement system for the measurement and characterization of silicon carbide (SiC) power MOSFETs. The following study discusses the circuit layout and automation software for a measurement system that can perform CV measurements for all three MOSFET capacitances, CGS, CDS, and CGD. This measurement system can perform low voltage (0â 40V) and high voltage (40â 5kV) measurements. Accuracy of the measurement system can be safely and effectively adjusted based on the magnitude of the MOSFET capacitance. An IRF1010N power MOSFET,

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11

Zera, E., W. Nickel, G. P. Hao, L. Vanzetti, Stefan Kaskel, and G. D. Sorarù. "Nitrogen doped carbide derived carbon aerogels by chlorine etching of a SiCN aerogel." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-224321.

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Silicon was selectively removed from a silicon carbonitride (SiCN) aerogel by hot chlorine gas treatment, leading to a N-doped carbon aerogel (N-CDC aerogel). The combined effects of pyrolysis and etching temperature were studied with regard to the change in the composition of the material after etching as well as the microstructure of the produced hierarchically porous material. Upon removal of Si from amorphous SiCN, carbon and nitrogen, which are not bonded together in the starting material, react, creating new C–N bonds. The removal of silicon also gives rise to a high amount of micropores

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12

Zera, E., W. Nickel, G. P. Hao, L. Vanzetti, Stefan Kaskel, and G. D. Sorarù. "Nitrogen doped carbide derived carbon aerogels by chlorine etching of a SiCN aerogel." Royal Society of Chemistry, 2016. https://tud.qucosa.de/id/qucosa%3A30313.

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Silicon was selectively removed from a silicon carbonitride (SiCN) aerogel by hot chlorine gas treatment, leading to a N-doped carbon aerogel (N-CDC aerogel). The combined effects of pyrolysis and etching temperature were studied with regard to the change in the composition of the material after etching as well as the microstructure of the produced hierarchically porous material. Upon removal of Si from amorphous SiCN, carbon and nitrogen, which are not bonded together in the starting material, react, creating new C–N bonds. The removal of silicon also gives rise to a high amount of micropores

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13

Zhang, ZiHao. "A High Temperature Reference Voltage Generator with SiC Transistors." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/72888.

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Natural resources are always collected from harsh environments, such as mines and deep wells. Currently, depleted oil wells force the gas and oil industry to drill deeper. As the industry drills deeper, temperatures of these wells can exceed 210 °C. Contemporary downhole systems have reached their depth and temperature limitations in deep basins and are no longer meet the high requirements in harsh environment industries. Therefore, robust electronic systems that can operate reliably in harsh environments are in high demand. This thesis presents a high temperature reference voltage generator t

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14

PADOVANO, ELISA. "Ceramic multilayer based on ZrB2/SiC system for aerospace applications." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2599760.

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The work of this PhD thesis is focused on the processing and characterisation of ZrB2/SiC based multilayer materials, produced by tape casting and sintered without pressure assistance for aerospace applications. The multilayer components were processed in order to be used as external part of a thermal protection system; because of they directly face the atmosphere, in order to withstand high temperature, high heat fluxes and oxidizing environment, they have to show good oxidation and thermal shock resistance, high emissivity, thermal management capability, suitable strength, stiffness and hard

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15

Kubíček, Dominik. "Výroba kovového těsnicího kroužku na CNC obráběcím stroji." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230399.

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Theoretical analysis of the possibility of manufacturing a metal sealing ring on the CNC machine tool. Selecting the most appropriate technology and manufacturing process analysis, involving selection of materials, tools and machining conditions.

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16

Frewin, Christopher L. "Design and Implementation of a 200mm 3C-SiC CVD Reactor." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001855.

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17

André, Mikael, and Hannes Paulsson. "Design of microcontroller circuit and measurement software for SiC and MOREBAC experiment." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188836.

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This paper describes the development of an experiment to test the characteristics and functionality of Silicon Carbide (SiC) components in a space environment. The experiment is a part the "Miniature Student Satellite" (MIST) project, and the "Work on Venus" project, both situated at KTH, Stockholm, Sweden The paper primarily covers the development and implementation of the experiments microcontroller and its software, whilst the construction and development of the test circuit for the transistors is carried out at the same time by another team, and therefore described in a separate paper. A m

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18

Tian, Ye. "SiC Readout IC for High Temperature Seismic Sensor System." Doctoral thesis, KTH, Integrerade komponenter och kretsar, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213969.

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Over the last decade, electronics operating at high temperatures have been increasingly demanded to support in situ sensing applications such as automotive, deep-well drilling and aerospace. However, few of these applications have requirements above 460 °C, as the surface temperature of Venus, which is a specific target for the seismic sensing application in this thesis. Due to its wide bandgap, Silicon Carbide (SiC) is a promising candidate to implement integrated circuits (ICs) operating in such extreme environments. In this thesis, various analog and mixed-signal ICs in 4H-SiC bipolar techn

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19

FROMENT, ANNE KARINE. "Determination des activites thermodynamiques du bore et du carbone dans la phase carbure du systeme bore/carbone." Paris 6, 1989. http://www.theses.fr/1989PA066191.

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Le diagramme d'equilibre bore-carbone presente un domaine monophase s'etendant entre les teneurs atomiques 9% et 2% en carbone. La mesure de l'activite du carbone a ete entreprise dans cette gamme de composition par les methodes suivantes: 1) analyse quantitative du melange methane-hydrogene en equilibre a 900c avec le carbure, 2) mesure a 400c de la force electromotrice d'une pile comportant le materiau a etudier, 3) spectrometrie de masse a haute temperature. La premiere methode s'est averee inoperante pour atteindre le but vise; l'appareil utilise a cependant permis d'elaborer une phase pur

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20

Погребняк, Олександр Дмитрович, Александр Дмитриевич Погребняк, Oleksandr Dmytrovych Pohrebniak та ін. "Структура и физико-механические свойства нитридных и карбидных многослойных систем на основе (Ta, Hf, V)". Thesis, Сумский государственный университет, 2015. http://essuir.sumdu.edu.ua/handle/123456789/40766.

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Поскольку промышленный интерес направлен на повышение износостойкости, трещиностойкости и твердости, были рассмотрены физико-механические свойства многослойных нитридных и карбидных систем на основе Ta, Hf, V. Переходные металлы, такие как: Ta, Hf, V, часто используются в комбинациях с Ti, но их потенциал не раскрыт в полной мере, поэтому целесообразно рассмотреть эти химические элементы, как основные в нитридных и карбидных многоэлементных системах.

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21

He, Zhangting. "CALPHAD study of cubic carbide systems with Cr." Thesis, KTH, Materialvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175730.

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Cubic carbides (titanium, tantalum, niobium, and zirconium carbides) can constitute a significant proportion of so-called cubic and cermet grades, where it is added to substitute a portion of tungsten carbide. It is thus critical to understand and be able to thermodynamically model the cubic carbide systems. In order to do this, the thermodynamic descriptions of lower order systems, such as the Ti-Cr-C system, need to be well studied. To approach this goal, an extensive literature survey of thermodynamic data and phase diagram information on the Ti-Cr-C system, the Ta-Cr-C system, the Nb-Cr-C

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22

Dusatko, Tomas A. "Silicon carbide RF-MEM resonators." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100250.

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A low-temperature (<300°C) method to fabricate electrostatically actuated microelectromechanical (MEM) clamped-clamped beam resonators has been developed. It utilizes an amorphous silicon carbide (SiC) structural layer and a thin polyimide spacer. The resonator beam is constructed by DC sputtering a tri-layer composite of low-stress SiC and aluminum over the thin polyimide sacrificial layer, and is then released using a microwave O 2 plasma etch. Deposition parameters have been optimized to yield low-stress films (<50MPa), in order to minimize the chance of stress-induced buckling or fracture

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23

Frankeser, Sophia. "Monitoring of age-relevant parameters in an integrated inverter system for electrical drives based on SiC-BJTs." Universitätsverlag der Technischen Universität Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A31470.

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The Silicon Carbide Bipolar Transistor is a device that is barely brought into real application so far. It features very low conduction losses and a high power density. The application is in some points different and unusual in comparison to the mainstream power semiconductors as IGBTs or MOSFETs. The Silicon Carbide Bipolar Transistor, the SiC-BJT, is a current driven device and the effort in driving is uncommonly high. As an outcome of the present work it can be said that it is more like a shift of requirements from the power semiconductor power unit to the driver stage. With consideration o

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Markström, Andreas. "Thermodynamic modelling of carbides in multicomponent systems." Licentiate thesis, KTH, Materials Science and Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10013.

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<p>This thesis concerns thermodynamic modeling of carbides in multicomponent systems. Focus has been made on systems interesting for cemented carbide production but the results are also useful for many other application were the material consist of different carbides, for example tool steels/high speed steels. The Co-W-C system forms the basis in cemented carbide production. An accurate thermodynamic description of this system is therefore crucial for extrapolation into higher order systems. New experimental results on the liquid+fcc+graphite+WC and liquid+fcc+WC+M6C equilibrium temperatures,

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25

Chen, Hailong. "Radiation Effects in Silicon Carbide (SiC) Micro/Nanoelectromechanical Systems (M/NEMS)." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1576966872894631.

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26

Carter, Thomas Clifford. "Feasibility of processing mixed carbide nuclear fuels for use in transmutation systems." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011280.

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27

Walbrühl, Martin. "ICME guided development of cemented carbides with alternative binder systems." Doctoral thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214108.

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The development of alternative binder systems for tungsten carbide (WC) based cemented carbides has again become of relevance due to possible changes in EU regulations regarding the use of Cobalt (Co). A framework for the ICME (Integrated Computational Materials Engineering) based Materials Design is presented to accelerate the development of alternative binder systems. Part one of this work deals with the design of the cemented carbide composite hardness. It has been shown that the intrinsic binder hardness is comparable to a bulk metal alloy and that based on the binder solubilities a solid

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28

Unal, Ozer. "Interface studies in silicon nitride/silicon carbide and gallium indium arsenide/gallium arsenide systems." Case Western Reserve University School of Graduate Studies / OhioLINK, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=case1059501714.

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29

He, Ting. "SILICON CARBIDE (SiC) NANOELECTROMECHANICAL SYSTEMS (NEMS) FOR STEEP-SUBTHRESHOLD-SLOPE LOGIC DEVICES WITH LONGEVITY." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1434640099.

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30

Markström, Andreas. "Thermodynamic modeling of carbides in multicomponent systems : theoretical and experimental approach /." Stockholm : KTH Industrial Engineering and Management, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10013.

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31

Tlili, Olfa. "Hydrogen systems : what contribution to the energy system? Findings from multiple modelling approaches." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC083/document.

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L'hydrogène… Cet élément simple et très abondant pourrait être un contributeur clé à la transition énergétique, mais dans quelles conditions technico-économiques et politiques ? Cette thèse propose une contribution à l'évaluation de la faisabilité de pénétration de l'hydrogène dans le système énergétique, en mettant en oeuvre différents modèles qui permettent des éclairages complémentaires. Elle se concentre sur l’hydrogène bas carbone, obtenu par électrolyse de l’eau.Notre analyse multirégionale qui porte sur le contexte énergétique européen, américain, chinois et japonais (régions qui présen

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Newby, Pascal. "Fabrication de semiconducteurs poreux pour améliorer l'isolation thermique des MEMS." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0154/document.

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L'isolation thermique est essentielle dans de nombreux types de MEMS (micro-systèmes électro-mécaniques). Selon le type de dispositif, l'isolation permet de réduire la consommation d'énergie, diminuer le temps de réponse, ou augmenter sa sensibilité. Les matériaux d'isolation thermique actuellement disponibles sont difficiles à intégrer en couche épaisse dans des dispositifs en silicium. À cause de cela, l'approche la plus utilisée pour l'isolation est d'intégrer les zones à isoler sur des membranes minces (~ 1 µm). Cela assure une bonne isolation, mais est restrictif pour la conception du dis

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Miozzi, Ferrini Francesca. "Experimental study of the Fe-Si-C system and application to carbon rich exoplanet." Electronic Thesis or Diss., Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2019SORUS241.pdf.

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Plus de 4000 exoplanètes ont été découvertes, orbitant autour d’étoiles ayant différentes compositions. Ces exoplanètes sont détectées et étudiées par observations indirectes qui, dans de nombreux cas, donnent accès aux propriétés principales des planètes: leurs masses et leurs rayons. Ces paramètres peuvent être calculés à partir d’un modèle et comparés à ceux observés. Toutefois, cela est plus difficile pour des planètes qui orbitent autour d’étoiles ayant une composition chimique différente du Soleil, par exemple enrichie en carbone, car les propriétés physiques des carbures (i.e. carbures

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Hu, Boxue. "Challenges and Solutions of Applying Medium-Voltage Silicon Carbide Devices in Medium and High-Voltage Systems." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1565967269661455.

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Khan, Zuhair Subhani. "Development of environmental barrier coatings (EBC) on silicon carbide and SiC composites for advanced energy generation systems." Kyoto University, 2006. http://hdl.handle.net/2433/135552.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(エネルギー科学)<br>甲第12564号<br>エネ博第135号<br>新制||エネ||33(附属図書館)<br>UT51-2006-P24<br>京都大学大学院エネルギー科学研究科エネルギー応用科学専攻<br>(主査)教授香山晃, 教授小西哲之, 助教授檜木達也<br>学位規則第4条第1項該当

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Cavallucci, Tommaso. "Atomic and electronic properties of graphene based systems grown on silicon carbide: a density functional theory study." Doctoral thesis, Scuola Normale Superiore, 2018. http://hdl.handle.net/11384/85918.

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Kaplan, Bartek. "Experimental and theoretical study of carbides in the Co-Cr-C system : Structure, alloying and stability." Licentiate thesis, KTH, Termodynamisk modellering, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-141129.

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The research presented in this thesis explores the structure, alloying and stability of the carbides in the Co-Cr-C system by using the CALPHAD approach supported by experimental measurements and ab initio calculations. WC-Co based cemented carbide materials consist of hard WC grains and a ductile Co-based binder. Cr is usually added to cemented carbides for the purpose of reducing grain growth during sintering or to increase corrosion resistance. The Co-Cr-C system is highly relevant for Cr-containing cemented carbides. For example, it determines the allowable C-content interval in the quater

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Fernández, Palomeque Efrén Esteban. "Optimization of a CSI inverter and DC/DC elevator with silicon carbide devices, for applications in electric traction systems." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/666485.

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The applications of electric traction systems currently focus on developing technologies with greater energy efficiency and lower environmental impact. Manufacturers of hybrid and electric vehicles are looking for ways to improve and optimize the efficiency of their models. Manufacturers are looking for more efficient and more compact converter topologies. The use of new band gap materials in the construction of these topologies has generated many debates and new lines of research especially in the optimization of these topologies. The silicon carbide (SiC) based switching devices provide sig

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Parikh, Rinku Pankaj. "Simulation-based design, optimization, and control of silicon carbide and gallium nitride thin film chemical vapor deposition reactor systems." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3976.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Chemical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Rönnby, Karl. "Monte Carlo Simulations for Chemical Systems." Thesis, Linköpings universitet, Matematiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-132811.

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This thesis investigates dierent types of Monte Carlo estimators for use in computationof chemical system, mainly to be used in calculating surface growthand evolution of SiC. Monte Carlo methods are a class of algorithms using randomsampling to numerical solve problems and are used in many cases. Threedierent types of Monte Carlo methods are studied, a simple Monte Carlo estimatorand two types of Markov chain Monte Carlo Metropolis algorithm MonteCarlo and kinetic Monte Carlo. The mathematical background is given for allmethods and they are tested both on smaller system, with known results to

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SOLASTIOUK, GALIVEL FRANCINE. "Equilibres liquide-vapeur des systemes propane-methanol et propane-methanol-dioxyde de carbone : mesures et representations." Paris, ENMP, 1988. http://www.theses.fr/1988ENMP0103.

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Makarova, Anna A., Elena V. Grachova, Dorota Niedzialek, et al. "A curious interplay in the films of N-heterocyclic carbene PtII complexes upon deposition of alkali metals." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-215966.

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The recently synthesized series of PtII complexes containing cyclometallating (phenylpyridine or benzoquinoline) and N-heterocyclic carbene ligands possess intriguing structures, topologies, and light emitting properties. Here, we report curious physicochemical interactions between in situ PVD-grown films of a typical representative of the aforementioned PtII complex compounds and Li, Na, K and Cs atoms. Based on a combination of detailed core-level photoelectron spectroscopy and quantum-chemical calculations at the density functional theory level, we found that the deposition of alkali atoms

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Knight, Travis Warren. "Processing of solid solution, mixed uranium/refractory metal carbides for advanced space nuclear power and propulsion systems." [Florida] : State University System of Florida, 2000. http://etd.fcla.edu/etd/uf/2000/amt2444/disert%5F13.pdf.

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Thesis (Ph. D.)--University of Florida, 2000.<br>Title from first page of PDF file. Document formatted into pages; contains vii, 167 p.; also contains graphics. Vita. Includes bibliographical references (p. 162-166).

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Basaran, Mustafa Bulent. "Computational Analysis Of Advanced Composite Armor Systems." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608858/index.pdf.

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Achieving light weight armor design has become an important engineering challenge in the last three decades. As weapons becoming highly sophisticated, so does the ammunition, potential targets have to be well protected against such threats. In order to provide mobility, light and effective armor protection materials should be used. In this thesis, numerical simulation of the silicon carbide armor backed by KevlarTM composite and orthogonally impacted by 7.62mm armor piercing (AP) projectile at an initial velocity of 850 m/s is analyzed by using AUTODYN hydrocode. As a first step, ceramic mate

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45

Wang, Zhao. "Propriétés Electro-mécaniques des Nanotubes de Carbone." Phd thesis, Université de Franche-Comté, 2008. http://tel.archives-ouvertes.fr/tel-00352725.

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Le but de cette thèse était de modéliser la réponse mécanique de nanotubes de carbone à des champs électriques. Nous avons commencé par utiliser le potentiel AIREBO dans des simulations de dynamique moléculaire afin d'étudier l'élasticité non-linéaire et la limite de déformation en torsion de divers nanotubes, en fonction de leur longueur, rayon et chiralité. Nous trouvons notamment que le module d'Young effectif des tubes décroît d'autant plus vite que la chiralité est faible. D'autre part, nous montrons que la limite de l'énergie stockable par atome lors de la torsion d'un tube est d'autant

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Blanchard, Rémi. "Redox shuttle and positive electrode protection for Li-O2 systems." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI098/document.

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Les travaux de cette thèse focalisent sur la résolution de deux problèmes majeurs des électrodes positives de systèmes Li-O2, dus à la nature du produit de décharge formé pendant la réaction de réduction de l'oxygène, en milieux Li+ : Lithium peroxyde (Li2O2). Le premier problème est lié au processus de formation de ce dernier (étapes successives de nucléation électrochimiques et de dismutation chimique d'un intermédiaire : le superoxide de lithium), qui conduit à la formation de très grosses particules de peroxyde lithium à la surface de l'électrode. Du fait de leurs taille et de leur résisti

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Hami, Mohamed. "Spectroscopie du mélange helium-xénon : rôle du monoxyde de carbone : analyse cinétique dans l'ultra-violet lointain." Toulouse 3, 1988. http://www.theses.fr/1988TOU30169.

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Etude spectroscopique des gaz purs et des melanges he-xe, excites par des particules alpha , entre 110 et 600 nm. Dans he observations de transitions moleculaires a 164 et 365 nm, et, en presence de co, du 1er systeme negatif (absence de v'=2). Dans xe, observation de deux continuums en uv proche et lointain et de la 2eme raie de resonance. Dans les melanges he-xe, observation en plus de la 1ere raie de resonance de xe avec renforcement des emissions de he par xe. Dans les melanges ne-co, emission du 1er systeme negatif et du 4eme systeme positif de l'ion et de la molecule; renforcement des em

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Schmid, Thibault E. "Synergism between N-heterocyclic carbene and phosphorus-based ligands in ruthenium and palladium catalytic systems." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3452.

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N-heterocyclic carbenes (NHCs) have become a very popular class of ligands, which has found uses in numerous catalytic applications. The use of such compounds in combination with phosphorus-based ligands within metal complexes has enabled the design of very active yet robust catalytic systems. The following chapters will describe the design of novel well-defined palladium- and ruthenium-based pre-catalysts featuring a NHC and a phosphorus-based ligand, referred at as mixed ligand systems. Such species were employed in catalysis where their properties appeared highly beneficial, uses at low cat

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Holdren, Matthew C. "Capability Study of Lattice Frame Materials for Use as Recuperative Heat Exchangers in Aircraft Systems." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1554463168699054.

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Pillet, Jean-Damien. "Spectroscopie tunnel des Etats Liés d'Andreev dans un Nanotube de Carbone." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00833472.

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La supraconductivité est un ordre électronique fascinant dans lequel les électrons s'apparient par le biais d'une interaction attractive et condensent dans un état quantique macroscopique pouvant porter un courant non dissipatif, i. E. Un supercourant. Dans les structures hybrides où des supraconducteurs (S) sont mis en contact avec des matériaux non supraconducteurs (X), les paires se propageant de S " contaminent " X lui conférant des propriétés supraconductrices à proximité de l'interface, parmi lesquels la possibilité de porter un supercourant. La transmission d'un supercourant à travers n

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