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Academic literature on the topic 'Nitrures – Propriétés thermiques'
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Dissertations / Theses on the topic "Nitrures – Propriétés thermiques"
Lecraz, Catherine. "Etude des réactions entre l'oxyde mixte d'uranium-plutonium et le nitrure d'uranium et entre l'oxyde d'uranium et le nitrure d'uranium." Toulouse, INPT, 1993. http://www.theses.fr/1993INPT039G.
Full textAndenet, Alemu. "Propriétés optiques du nitrure de gallium épitaxié sur la face A du saphir." Montpellier 2, 1999. http://www.theses.fr/1999MON20086.
Full textKouassi, Kouakou Léonce. "Faisabilité de films isolants de nitrure de silicium par technique de dépôt en phase vapeur à basse température : comparaison des filières gazeuses Dichlorosilane-Ammoniac et Disilane-Ammoniac." Toulouse 3, 1992. http://www.theses.fr/1992TOU30168.
Full textGerbier, Philippe. "Les poly[(silylène)diacétylènes] : une nouvelle classe de polymères précurseurs de céramiques à base de carbure ou de nitrure de silicium." Montpellier 2, 1994. http://www.theses.fr/1994MON20161.
Full textPlaneix, Jean-Marc. "Synthèse de précurseurs de carbure et de carbonitrure de silicium : étude de leur céramisation." Montpellier 2, 1992. http://www.theses.fr/1992MON20089.
Full textHafidi, Abdeslem. "Contribution à l'étude des propriétés thermiques de céramiques à base de nitrure d'aluminium." Limoges, 1992. http://www.theses.fr/1992LIMO0152.
Full textBaffie, Thierry. "Contribution à l'amélioration des propriétés thermiques d'assemblages cuivre/nitrure d'aluminium polycristallin destinés à l'électronique de puissance." Grenoble INPG, 2000. http://www.theses.fr/2000INPG0087.
Full textVan, Robaeys Alexis. "Etude expérimentale et numérique du faïençage thermique en rectification du 32CrMoV13 nitruré." Ecole nationale d'ingénieurs (Saint-Etienne), 2015. http://www.theses.fr/2015ENISE016.
Full textHelicopter power transmission parts are manufactured in high-tensile steel 32CrMoV13, which is case-hardened by nitriding. After nitriding, functional surfaces such as bearing races are grinded in order to give them adequate tolerances, roughness and surface topology. When not properly controlled, the grinding operation can create micro-crack networks on the finished surface. The aim of the study was to gain an understanding of the phenomenon by determining the local conditions at the surface generating and propagating the cracks. A literature study highlighted a strong link between micro-cracks and cyclic thermal loads. This load was identified for grinding operations by measuring the temperature and forces at the tool-workpiece interface. The results have shown a strong link between specific removal rate, efforts, and thermal load. The analysis of residual stresses after grinding showed the existence of a transition domain in which the surface is not cracked, but is in a tensile state. A 3D thermo-mechanical numerical model for grinding of nitrided 32CrMoV13 steel was developed using SYSWELD®, in order to predict the residual stress distribution in the workpiece after grinding. It uses a pure thermal load to represent the action of the tool on the surface. Its magnitude and distribution were studied in order to accurately represent the material removal induced by the grinding wheel. Thanks to the simulations, the degradation mechanism was exposed: under the thermal load, the matter heats up locally and undergoes a high compression, surpassing its tensile stress. During cooling, the damaged matter then passes to a tensile state, prone to cracking
Belkerk, Boubakeur Essedik. "Nouveaux outils expérimentaux pour l’analyse des propriétés thermiques de nanostructures élaborées par procédés plasma." Nantes, 2013. http://archive.bu.univ-nantes.fr/pollux/show.action?id=76e4788f-8783-4560-b1a3-a1c60679772f.
Full textNew experimental techniques for measuring thermal properties of thin films and nanostructures are presented. Probes have been designed and fabricated for detecting ultrafast transient temperature responses in the time window [100 ns - 10 μs] subsequent to electrical or optical pulses. Thermal transient models have been developed for estimating the thermal properties of materials by fitting the temperature signals. Experimental studies were carried on aluminum nitride and carbon nanowalls produced by plasma techniques. The thermal properties of those materials were found well correlated with the structural features of the films analyzed by X-ray diffraction, scanning electron microscopy and transmission electron microscopy
Fontaine, Florian. "Composites à matrice carbone-oxyde et carbone-nitrure : thermodynamique de l'élaboration et son impact sur les propriétés physico-chimiques, thermiques et mécaniques des composites." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14217/document.
Full textCarbon/carbon composites exhibit excellent mechanical and thermal properties at high temperature that make them espe-cially suitable for ablation or friction pieces. Their sensitivity toward oxidation above 400°C has lead to the will of doping them with refractory ceramics that are nonoxidizable or with a high oxidation temperature. The sol-gel process allowed to introduce 1 % in volume of titanium or aluminum oxide or nitride in the matrix. Nitrides are obtained by carbothermal nitridation of the oxide films. Two types of sols were used: the “standard” ones and those with extra sucrose. Sucrose is added to prevent pyrocarbon consumption during the nitridation. Furthermore, it was shown that it has an impact on the nitridation rate. Charged composites are then densified by Chemical Vapor Infiltration, which induces phases transforma-tions that were predicted by thermodynamics: titanium nitride films are partially carburized (formation of titanium carbonitride) and titanium dioxide films are reduced (formation of titanium oxycarbide). Aluminum-based films are more stable and don’t undergo any transformation. Thermal diffusivity of the as-synthesized composites is not much modified by the addition of these ceramics while the tensile and compressive strength are slightly increased. By the way, composites are hardened. Their oxidation kinetics is slowed down. Aluminum-rich composites exhibit a weight loss divided by two compared to the C/C reference. All those properties are directly, or not, linked to the composition of the sols, in particular to their sucrose content. Indeed, it was shown that sucrose-containing sols rather jellify on the surface of the composite, thus preventing the diffusion of precursor gases to the heart of the pieces. The final porosity is then modified. The porosity has an important impact on the compressive strength, thermal diffusivity and oxidation kinetics of the synthesized composites
Book chapters on the topic "Nitrures – Propriétés thermiques"
DOUMENG, Marie, Karl DELBÉ, Florentin BERTHET, Olivier MARSAN, Jean DENAPE, and France CHABERT. "Effets de taille et de nature des charges sur les propriétés thermiques et mécaniques des composites à matrice PEEK." In Nanocomposites, 97–146. ISTE Group, 2021. http://dx.doi.org/10.51926/iste.9031.ch4.
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