Дисертації з теми "Microstructural modification"
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Illing, Cyprian A. W. "Chemical Mechanisms and Microstructural Modification of Alloy Surface Activation for Low-Temperature Carburization." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1521753968828438.
Повний текст джерелаNafisi, Shahrooz. "Effects of grain refining and modification on the microstructural evolution of semi-solid 356 alloy = Effets de l'affinage des grains et de la modification sur l'évolution microstructurale de l'alliage 356 semi-solide /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2006. http://theses.uqac.ca.
Повний текст джерелаLongworth, Hai Pham. "Microstructural modification of thin films and its relation to the electromigration-limited reliability of VLSI interconnects." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/13114.
Повний текст джерелаLiu, Xiaorui. "Crystallographic and microstructural study of as-cast and heat-treated Srmodified Al-12.7Si alloys." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0103/document.
Повний текст джерелаAl-Si alloys have attracted considerable attention due to their importance to industrial applications. In the present work, both crucible slowly solidified and slowly directionally solidified (DS) high-purity Al-12.7 wt. % Si alloys with and without 400 ppm Sr addition have been prepared and heat treated. The influence of Sr addition and post heat treatments on the microstructural and crystallographic features of the eutectic phases has been systematically studied. The growth characteristics of eutectic Si in the unmodified and the Sr-modified Al-12.7Si alloys were investigated. For the non-modification case, the formation of repeated single-orientation twin variants enables rapid growth of eutectic Si according to the twin plane re-entrant (TPRE) mechanism. Microscopically, Si crystals are plate-like elongated in one <1 1 0> direction that is not in accordance with the <1 1 2> growth assumed by the TPRE model. The <1 1 0> extension is realized by paired <1 1 2> zigzag growth on parallel twinning planes, leading to alternative disappearance and creation of 141° re-entrants. This growth manner ensures Si crystals to expose only their low-energy {1 1 1} planes to the melt. For the Sr-modification case, substantial changes appear in eutectic Si morphology, attributable to the restricted TPRE growth and the impurity induced twinning (IIT) growth. The first enhances lateral growth by forming new twins with parallel twinning planes, while the second leads to isotropic growth by forming differently oriented twins. Heat treatment brings about refinement of both eutectic phases. The refinement of the α-Al occurs concomitantly with the fragmentation and spheroidization of Si and is mainly related to the fracture of the Si crystals due to their limited capacity to accommodate the giant thermal expansion of the α-Al and the diffusion of Al atoms to the cracks during the heat treatment. The Si fracture generates “capillarity” force that activates the diffusion of Al atoms to the gap of the crack. Due to the substitutional feature of Al diffusion, the migration of vacancies toward the interior of the α-Al is induced when Al moves to the gaps, thus the voids of the Si fracture are transferred to the α-Al. In this way, the crystals of α-Al are distorted and defected. The produced crystal defects, in turn, initiate recovery and even recrystallization of the α-Al, resulting in grain refinement. The α-Al phase in the directionally solidified Al-12.7Si-0.04Sr alloy, displays a strong <1 0 0> fiber texture in the solidification direction. Giant <1 0 0> α-Al grains are mainly formed in the outer circle region of the cylindrical specimen due to the favorable heat evacuation directions available for the three <1 0 0> directions. After heat treatment, the texture intensity of the α-Al phase decreases due to the recovery and recrystallization, but the texture type does not change. For the eutectic Si phase in the as-cast alloy, there are two main fiber texture components, <1 0 0> and <1 1 0> in the DS direction, accompanied by two weak components, <2 2 1> and <1 1 3> in the same direction. The <1 0 0> and <1 1 0> components are from Si crystals located in the outer circle and center regions of the cylindrical specimen. The <2 2 1> and the <1 1 3> components are from multiple twins of the <1 1 0> and <1 0 0> oriented crystals. The weak intensities of these two components are related to their minor volume fraction. Once heat treated, the twinned parts with minor volume fractions enlarge at the expense of their twin related matrix, thus the <1 1 0> component is weakened and accompanied by the intensification of the components from the twins. The disappearance of the <1 1 3> component and the appearance of the <1 1 5> component are due to crystallographic rotation of Si crystals during their fragmentation
Hecht, Matthew David. "Effects of Heat Treatments and Compositional Modification on Carbide Network and Matrix Microstructure in Ultrahigh Carbon Steels." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1023.
Повний текст джерелаZamani, Mohammadreza. "Al-Si Cast Alloys - Microstructure and Mechanical Properties at Ambient and Elevated Temperature." Licentiate thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Material och tillverkning – Gjutning, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-26805.
Повний текст джерелаLiu, Jing. "Mechanisms of lifetime improvement in Thermal Barrier Coatings with Hf and/or Y modification of CMSX-4 superalloy substrates." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3423.
Повний текст джерелаPh.D.
Department of Mechanical, Materials and Aerospace Engineering
Engineering and Computer Science
Materials Science & Engr PhD
Anyango, Joseph Ochieng. "Physico-chemical modification of kafirin microstructures for application as biomaterials." Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/29708.
Повний текст джерелаThesis (PhD)--University of Pretoria, 2012.
Food Science
unrestricted
Valko, N., S. Anufric, A. Ivanov, and S. Vasiliev. "Laser Modification of the Microstructure of Zn-Co Electroplating Alloys." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42658.
Повний текст джерелаDíez, Escudero Anna. "Tuning the biological performance of calcium phosphates through microstructural and chemical modifications." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/620730.
Повний текст джерелаL'os és el teixit més trasplantats desprès de la sang. L'organització Mundial de la Salut ha posat de relleu l'increment de les malalties musculoesquelètiques, les quals esdevindran la quarta causa mundial de discapacitat en el següents anys. Malgrat la capacitat natural de l'ós per autoregenerar-se, els defectes ossis de grans dimensions necessiten l'ajuda de materials per restaurar-se completament. Actualment, l'ús d'empelts naturals és l'alternativa més emprada clínicament. Tot i això, els autoempelts comporten certes limitacions que requereixen ser adreçades per tal de fer front a les elevades demandes d'una població mundial amb un grau d'envelliment creixent. Els empelts basats en fosfats càlcics (CaPs) són coneguts des de la dècada del 1970 i són uns excel·lents candidats per a la regeneració òssia donada la seva composició, similar a la fase mineral de l'os, que consisteix en aproximadament un 70% d'hidroxiapatita (HA). Els CaPs, en particular l'HA, posseeixen unes propietats intrínseques excepcionals com ara la biocompatibilitat, bioactivitat o la capacitat de suportar el creixement de nou os. Malgrat la seva semblança amb l'os, l'HA és massa estable químicament, i un cop implantada es degrada molt lentament. L'empelt ossi sintètic idealment s'hauria d'integrar en el cicle de remodelació òssia, el que requereix d'un balanç entre la seva reabsorció i la progressiva substitució per os nou. Aquesta capacitat es pot modular mitjançant propietats inherents del material o per mitjà de la combinació de substrats amb molècules capaces d'orquestrar adequadament les respostes de les diverses cèl·lules implicades en la restauració o regeneració òssia. La present tesis cerca explorar, per una banda, la possibilitat de modular les propietats físico-químiques dels CaPs per tal de millorar la seva degradació, així com investigar el potencial de funcionalitzar els CaPs amb heparina, amb la finalitat de millorar les interaccions biològiques a les diferents etapes de la restauració òssia, tant durant la primera etapa inflamatòria, com durant la resorció i el creixement d'os nou. Concretament, la primera part de la present tesi explora la manera en què la modificació de propietats com la porositat, la superfície específica, la microestructura o la composició dels CaPs pot ser emprada per regular la degradació d'aquests materials en una solució acídica similar a l'emprada pels osteoclasts durant la resorció òssia. La interrelació de totes aquestes propietats emmascara de vegades la importància relativa de les propietats texturals, molt lligades a les composicionals, dificultant la predicció dels nivells de degradació dels materials depenent de cada propietat. Per tal de mimetitzar encara més la composició de l'os, s'estudiarà també diferents estratègies per incorporar ions carbonat en l'estructura cristal·lina de l'HA. El segon bloc de la tesi explora la funcionalització dels CaPs amb heparina, un tipus de glicosaminoglicà altament sulfonat present en la matriu extracel·lular de l'os. L'afinitat de l'heparina per captar factors de creixement fan d'aquesta molècula un candidat excel·lent per capturar factors de creixement endògens capaços de regular la resposta cel·lular. Així doncs, partint de les propietats anti-inflamatòries de l'heparina, i de la seva implicació en els processos d'osteogènesi i osteoclastogènesi s'ha formulat la hipòtesi de que aquesta biomolècula podria contribuir a millorar les prestacions dels empelts ossis sintètics. Amb aquest objectiu, s'ha posat a punt un procés d'heparinització de CaPs i s'ha avaluat el seu efecte sobre la resposta de cèl·lules humanes del sistema immune, cèl·lules osteogèniques i osteoclàstiques, per tal d'escatir les possibles sinèrgies de tots dos sistemes, l'immune i l'ossi en la regeneració.
Hua, Bin. "Studies on microstructure modification in transparent materials by femtosecond laser pulses." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/136159.
Повний текст джерелаWu, Tso-chang. "Laser Surface Modification of AZ31B Mg Alloy Bio-Implant Material." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1248459/.
Повний текст джерелаHauptstein, Anneliese Materials Science & Engineering Faculty of Science UNSW. "The effects of electron irradiation on the morphology, modification and microstructure of talc powder." Awarded by:University of New South Wales. School of Materials Science and Engineering, 2007. http://handle.unsw.edu.au/1959.4/27303.
Повний текст джерелаKniep, Benjamin-Louis. "Microstructural modifications of copper zinc oxide catalysts as a function of precipitate ageing." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975886851.
Повний текст джерелаKorthals, Brigitte [Verfasser]. "Nanoparticles of Polybutadiene with Unconventional Microstructures and their Post-Polymerization Modification / Brigitte Korthals." Konstanz : Bibliothek der Universität Konstanz, 2010. http://d-nb.info/1017236089/34.
Повний текст джерелаHorvat, Frank E. "A Numerical and Experimental Investigation for the Modification and Design of a Gerolor Using Low Viscoscity Fluids." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1342585429.
Повний текст джерелаCatrin, Rodolphe [Verfasser]. "Effects of microstructure modification induced by laser interference patterning of thin films / Rodolphe Catrin." Aachen : Shaker, 2012. http://d-nb.info/1069044512/34.
Повний текст джерелаChen, Weijie. "Microstructure modification and mechanical behaviour of an investment cast near ã-TiAl intermetallic alloy." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0016/NQ57605.pdf.
Повний текст джерелаContino, Anna Rita. "Modification of Anode Microstructure to Improve Redox Stability of Solid Oxide Fuel Cells (SOFCs)." Doctoral thesis, Università degli studi di Trento, 2010. https://hdl.handle.net/11572/369234.
Повний текст джерелаContino, Anna Rita. "Modification of Anode Microstructure to Improve Redox Stability of Solid Oxide Fuel Cells (SOFCs)." Doctoral thesis, University of Trento, 2010. http://eprints-phd.biblio.unitn.it/349/1/Modification_of_Anode_Microstructure_to_Improve_Redox_Stability_of_Solid_Oxide_Fuel_Cells_(SOFCs).pdf.
Повний текст джерелаLomello, Fernando. "Optimization of nanostructured oxide-based powders by surface modification." Lyon, INSA, 2010. http://theses.insa-lyon.fr/publication/2010ISAL0028/these.pdf.
Повний текст джерелаVieille, Laetitia. "Modifications microstructurales en température de la phase hydrocalumite et des dérivés hydrocalumite-polymères." Clermont-Ferrand 2, 2004. http://www.theses.fr/2004CLF22531.
Повний текст джерелаDe, Carvalho Pinheiro Bianca. "Étude par diffraction des rayons X des modifications microstructurales en cours de fatigue." Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10063/document.
Повний текст джерелаThe present work aims to evaluate the microstructural mechanisms associated with the initiation of fatigue damage of steels used in the oil and gas industry. Microdeformations and residual stresses (macrostresses) were evaluated by X-ray diffraction in real time during alternating bending fatigue tests performed on flat test pieces taken from a pipe sample. Microdeformations were estimated from measurements of the full width at half maximum (FWHM) of the diffraction peak and residual stresses from the peak displacement. The fatigue tests were performed at five different stress levels. Three stages of changes during the evolution of microdeformation were detected. We show that their amplitude and duration are proportional to the level of alternating stress. Similar variations were observed for the residual stresses, with duration identical to those of the microdeformation. Changes in the density and distribution of dislocations were observed by transmission electron microscopy using the technique of focused ion beam. To understand the role of the initial structure, fatigue tests on annealed samples were performed under the same test conditions. Again, three stages of changes are observed but with an increase of the microdeformations instead of a decrease during the first stage due to the initial state of the dislocation network. The results are very encouraging for the consideration of the microstructural evolutions in the construction of a future counter of fatigue damage initiation in materials
Eyidi, Dominique. "Microstructures d'oxydes supraconducteurs à haute température critique à base de mercure ; modification par déformation plastique." Poitiers, 1999. http://www.theses.fr/1999POIT2317.
Повний текст джерелаChollet, Sébastien. "Étude des modifications microstructurales de superalliages à base nickel induites par nitruration assistée plasma." Thesis, Poitiers, 2014. http://www.theses.fr/2014POIT2293/document.
Повний текст джерелаNickel-based superalloys are commonly used in pressurized water heat exchangers or in the hottest sections of aeroengines or industrial gas turbines, where they are subjected to high temperature and severe mechanical solicitations (fatigue, creep). To allow use of those materials in more and more difficult operating conditions and to improve their duration, different nitriding treatments have been proposed to harden the surface while maintaining or improving their mechanical strength and chemical resistance. However, modifications induced by nitriding, resulting stability in time and influences of the initial microstructure are still poorly understood in these complex materials. In this work, we investigated the behavior of plasma nitriding on superalloys according to their initial microstructure and chemical composition. Thus, different types of Nickel-based superalloys were selected with various microstructures, possibly including precipitates like Ni3(Al, Ti, Nb) and/or Ni3(Nb). Then, we have characterized the modifications induced by nitrogen introduction in the materials after nitriding treatment at low temperature (400°C): lattice expansion, generation of residual stress, precipitates behavior, nitrides formation, plasticity, anisotropy... The results suggest different behaviors depending on the composition of precipitates. Finally, these structural modifications and their evolutions have been studied during an annealing at higher temperature (650°C) in order to study the stability of the nitrided layers
Graziani, Alessandro. "Chemical composition modification of casting aluminium alloys for engine applications." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10018/.
Повний текст джерелаBakare, Mayowa Sunday. "The effects of microstructural modifications on corrosion resistance of metallic corrosion resistant materials Inconel 625 and FeCrMoCB." Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546474.
Повний текст джерелаAhmed, Nauman. "Characterisation of different forms of Inconel 625 for determining the effects of microstructural modifications on electrochemical behaviour." Thesis, University of Nottingham, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493327.
Повний текст джерелаShahid, Hafiz Rub Nawaz [Verfasser], Jürgen [Gutachter] Eckert, and Prashanth Konda [Gutachter] Gokuldoss. "Strengthening of Al-based composites by microstructural modifications / Hafiz Rub Nawaz Shahid ; Gutachter: Jürgen Eckert, Prashanth Konda Gokuldoss." Dresden : Technische Universität Dresden, 2019. http://d-nb.info/1226896995/34.
Повний текст джерелаCatrin, Rodolphe Verfasser], and Frank [Akademischer Betreuer] [Mücklich. "Effects of microstructure modification induced by laser interference patterning of thin films / Rodolphe Catrin. Betreuer: Frank Mücklich." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2012. http://d-nb.info/1052339565/34.
Повний текст джерелаCatrin, Rodolphe [Verfasser], and Frank [Akademischer Betreuer] Mücklich. "Effects of microstructure modification induced by laser interference patterning of thin films / Rodolphe Catrin. Betreuer: Frank Mücklich." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:291-scidok-47993.
Повний текст джерелаDonley, Carrie Lynn. "Interfaces in organic electronic devices: Surface characterization and modification and their effect on microstructure in molecular assemblies." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280407.
Повний текст джерелаOrmston, Marcus Winston. "Deposition and interface modification of thin magnetic multilayer films by closed-field unbalanced magnetron sputtering." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343533.
Повний текст джерелаThibault, Simon. "Modifications des propriétés physico-chimiques et de la microstructure de l'aluminium après nitruration par implantation d'ions multichargés." Phd thesis, Université de Caen, 2009. http://tel.archives-ouvertes.fr/tel-00403112.
Повний текст джерелаAcera, Fernandez José. "Modification of flax fibres for the development of epoxy-based biocomposites : Role of cell wall components and surface treatments on the microstructure and mechanical properties." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS218.
Повний текст джерелаNatural fibres can be considered as a relevant alternative to glass fibres in the manufacture of composite materials. Indeed, they present interesting physical characteristics, such as low density and good specific mechanical properties, which can compete with glass fibre reinforced composites. Moreover, natural fibres are obtained from renewable resources, and generally present lower environmental impacts during their production and use phases and their end of life. Unlike glass fibres, natural fibres, such as flax fibres, are complex hierarchical materials composed essentially of cellulose, hemicellulose, lignin, peptics cements and lipophilic extractives (waxes, fatty acids, etc.). This composition varies among species, collection site, plant maturity, batches, etc. Besides, the biochemical composition and structure of flax products and sub-products undergo wide variations according to the transformation steps from stems to yarns and fabrics. This influences greatly the final properties of flax fibres and their biocomposites. The first part of this study is focused on the characterization of flax fibres during their successive transformation steps. A homogenization of the chemical composition is observed at the final transformation steps, as well as an increment of the longitudinal tensile properties of flax yarns. The second part deals with the use of different washing treatments applied on flax tow fabrics and their influence on the extraction of flax cell wall components and the resulting microstructure and mechanical properties of epoxy/flax fibres reinforced biocomposites. It is shown that cell wall components play a key role in the flax yarns and elementary fibres dispersion and transverse mechanical behaviour of biocomposites. Finally, the application of different functionalization treatments onto flax fibres fabrics is investigated in order to improve the interfacial adhesion between fibres and matrix. The use of non-bio-based organosilane molecules (aminosilane, epoxysilane) and bio-based molecules (amino-acids and polysaccharides) is studied. Improvedstiffness in longitudinal tension test and stiffness and tensile strength in transverse tension test are observed due to the improvement of interfacial adhesion by surface functionalization of the fibres with both bio-based and non-bio-based molecules
Mitwally, Mohamed Elwi. "Surface modification and mechanical reliability enhancement of free-standing single crystal silicon microstructures using localized KrF excimer laser annealing." 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/200447.
Повний текст джерелаDargent, Éric. "Evolution de la microstructure de films polyester soumis à un traitement thermomécanique." Rouen, 1994. http://www.theses.fr/1994ROUES074.
Повний текст джерелаLe, Gloannec Brendan. "Modifications microstructurales sous sollicitations thermomécaniques sévères : application au soudage par résistance des gaines de combustibles en aciers ODS." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0367/document.
Повний текст джерелаOxide dispersion strengthened (ODS) steels are considered as candidate materials for thedevelopment of fuel cladding for sodium-cooled fast reactors (SFR). Resistance upset welding of thecladding is studied in this work. The aim is to determine and to understand the process effects on themicrostructure of ODS steels with 9% and 14% of chromium at the scales of the grains and thenanometric oxides. An approach coupling microstructural characterization of welds, numericalsimulation and physical simulation of the process, using a thermomechanical simulator Gleeble 3500,is proposed. Resistance welding locally imposes severe thermomechanical conditions in terms of strain,strain rate and temperature. Refinement of the microstructure is noted and correspond to a dynamicrecrystallization mechanism (14 % Cr steel) or the combination of dynamic recrystallization and phasetransformations (9 % Cr steel). The conditions of occurrence of dynamic recrystallization are studied.The possibility of a transition between continuous and discontinuous dynamic recrystallization is shownfor the 14 % Cr steel according to the loading conditions. Such severe thermomechanical conditionsinduce an increase in the size of nanoscale oxides associated with a decrease of their volume fraction
Sipple, Ernst-Michael. "Réarrangements structuraux et modifications microstructurales associés aux transformations de phases dans le système CaSO 4(s) - H 2O (g)." Dijon, 1999. http://www.theses.fr/1999DIJOS039.
Повний текст джерелаAchilli, Matteo. "Modification de la microstructure et des propriétés mécaniques d'échafaudages à base de gels de collagène pour la régénération du tissu vasculaire." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/28722/28722.pdf.
Повний текст джерелаThe need for small-caliber vascular replacements has attracted considerable attention on the development of scaffold-based vascular constructs in bioreactors. Reconstituted collagen gels represent ideal substrates for cell-mediated remodeling, but their low strength and low elasticity, limits their application as scaffold for the regeneration of the vascular tissue. These features result from collagen extraction and the consequent loss of structural organization. The objective of this project was to improve the mechanical performances of collagen gels in order to support the growth and the maturation of the vascular tissue under cyclic conditioning. Considering how fundamental collagen assembly is for the mechanical behavior of native tissues, the microstructure of reconstituted collagen lattices was modified by working on three aspects: 1) The intermolecular interactions and the aggregation of collagen monomers were tailored by modulating the experimental conditions, including pH, temperature, ionic strength and collagen concentration; 2) Inter-fibril crosslinking was carried out in order to fix neighboring collagen fibrils through their reactive side chains; 3) Gels were compacted and fibrils were aligned through cell-mediated remodeling. Spectrophotometric analyses and SEM confirmed the effects of changes in experimental conditions and cell-mediated remodeling on collagen gels microstructure. Notably, the presence of SMCs lead to tighter and highly oriented lattices, moreover in the presence of mechanical constraints. Mechanical tests showed that the adopted procedures contributed to the stiffening of collagen lattices. In particular, the modulation of the experimental conditions combined with crosslinking lead to lattices presenting lower hysteresis and higher elasticity as shown by cyclic tests. In conclusion, this study produced, in a short time (24-48 h), collagen gel-based lattices with improved stiffness, strength, and elastic recoil. The results suggest that these lattices are serious candidates for the role of temporary supports during the maturation period under cyclic loading.
Thiery, Mickaël. "Modélisation de la carbonatation atmosphérique des matériaux cimentaires : prise en compte des effets cinétiques et des modifications microstructurales et hydriques." Phd thesis, Ecole des Ponts ParisTech, 2005. http://pastel.archives-ouvertes.fr/pastel-00001517.
Повний текст джерелаPerrot, Philippe. "Modifications morphologiques et microstructurales du matériau actif des cathodes de batteries à l'ion lithium induites par broyage et traitement thermique." Poitiers, 1998. http://www.theses.fr/1998POIT2264.
Повний текст джерелаLee, Jiho. "Impact of process parameter modification on poly(3-hexylthiophene) film morphology and charge transport." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50409.
Повний текст джерелаVempaire, David. "Modification des propriétés magnétiques de couches minces de nickel et de manganèse et réalisation de microstructures magnétiques par implantation ionique en immersion plasma." Université Joseph Fourier (Grenoble), 2004. http://www.theses.fr/2004GRE10252.
Повний текст джерелаWE FIRST OF ALL STUDIED THE DEPOSIT OF THIN LAYERS OF MANGANESE AND NICKEL ON SILICON 100 USING THE PULVERIZATION ASSISTED BY MICROWAVE MUL TIDIPOLAR PLASMA TECHNIQUE. THE LAYERS OF NICKEL AND MANGANESI DEPOSITED WERE TH EN IMPLANTED WITH NITROGEN BY USING THE PLASMA BASED IMMERSION IMPLANTATION TECHNIQUE ASSISTED BY A MICROWAVE DE CR PLASMA. THIS TECHNIQUE ENABLED TO SYNTHESIZE THE NITRIDES NI3N AND MN4N lN SPITE OF THE METASTABILITY OF NI3N AND THE STRONG CHEMICAL REACTIVITY OF MANGANESE WITH OXYGEN. THEN WE HAVE IMPLANTED NITROGEN lN A DOUBLE LAYER NI ON MN SIMUL TANEOUSL Y TO NITRIDE THEM BY MAKING NI3N STACKING ON MN4N. THE METASTABILITY OF NI3N AND THE STRONG AFFINITY OF MANGANESE FOR NITROGEN, HAVE MADE NITROGEN IMPLANTED ENTIREL Y DIFFUSING lN MANGANESE DURING THE ANNEALING. THEN, WE HAVE INITIATED THE STUDY OF THE REALIZATION OF A MAGNETIC MICROSTRUCTURE BY NITROGEN IMPLANTATION lN A LAYER OF NICKEL THROUGH AN ORGANIC MASK
Sharma, Anurag. "Effects of Advanced Surface Treatments on Microstructure, Residual Stress and Corrosion-Fatigue Behavior of Aluminum Alloy 7075-T6." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin162765884039947.
Повний текст джерелаJagtap, Rohit. "The Effects of Ultrasonic Nano-crystal Surface Modification on Residual Stress, Microstructure and Fatigue Behavior of Low-Modulus Ti-35Nb-7Zr-5Ta-0.3O Alloy." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1479823317088871.
Повний текст джерелаLaroche, Marine. "Rôle des ondes de surface dans la modification des propriétés radiatives de matériaux microstructurés : application à la conception de sources infrarouges et à l'effet thermophotovoltaïque." Phd thesis, Ecole Centrale Paris, 2005. http://tel.archives-ouvertes.fr/tel-00011615.
Повний текст джерелаLa 1ère partie de cette thèse est consacrée au phénomène d'émission thermique cohérente et amplifiée par plasmon-polaritons de surface. Nous avons tout d'abord conçu et réalisé une source thermique de tungstène avec une directivité exceptionnelle dans le proche infrarouge. Nous avons ensuite étudié le refroidissement radiatif du silicium dopé grâce à l'amplification d'émission thermique par plasmons de surface. Nous avons comparé les performances de ces sources cohérentes avec celles d'un système anti-réfléchissant : l'écran de Salisbury.
Dans la 2ème partie, nous étudions l'impact du transfert radiatif en champ proche sur la conversion thermophotovoltaïque (TPV). L'excitation d'ondes de surface sur la source éclairant la cellule TPV engendre un transfert radiatif amplifié et quasi-monochromatique. Nous présentons un modèle quantitatif permettant de calculer le photocourant et le rendement. Nous montrons que l'on peut obtenir une augmentation significative de la puissance électrique extraite et du rendement d'un dispositif TPV éclairé en champ proche.
La 3ème partie porte sur les propriétés radiatives des cristaux photoniques induites par ondes de surface. Deux phénomènes connus en plasmonique ont pu être obtenus : la transmission résonante à travers un film opaque et l'émission thermique cohérente. Un avantage des cristaux photoniques est la possibilité de modifier la fréquence d'excitation des ondes de surface en faisant varier les paramètres du cristal.
Jaradeh, Majed. "The Effect of Processing Parameters and Alloy Composition on the Microstructure Formation and Quality of DC Cast Aluminium Alloys." Doctoral thesis, KTH, Materialvetenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4205.
Повний текст джерелаQC 20100901
Riestra, Martin. "High performing cast aluminium-silicon alloys." Licentiate thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Material och tillverkning, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-38005.
Повний текст джерелаSedighi, Moghaddam Maziar. "Wettability of modified wood." Doctoral thesis, KTH, Yt- och korrosionsvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175875.
Повний текст джерелаQC 20151029
Sustainable wood modification