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Academic literature on the topic 'Dépôts sous vide'
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Journal articles on the topic "Dépôts sous vide"
Benkacem, M., M. Dumas, J. M. Palau, and L. Lassabatère. "Etude de diodes Schottky réalisées sous ultra-vide par dépôt d'aluminium ou d'argent sur GaP type N clivé." Revue de Physique Appliquée 24, no. 1 (1989): 45–50. http://dx.doi.org/10.1051/rphysap:0198900240104500.
Full textDUMONT, R., M. ROUX, C. TOURAILLE, J. AGABRIEL, D. MICOL, D. CONTOUR, and M. C. BAYLE. "Engraissement des vaches de réforme de race Charolaise. Effet d’un apport de tourteau de lin sur les performances d’engraissement et les propriétés physico-chimiques et sensorielles de la viande." INRAE Productions Animales 10, no. 2 (April 7, 1997): 163–74. http://dx.doi.org/10.20870/productions-animales.1997.10.2.3992.
Full textPickrill, Richard A., and David J. W. Piper. "MARINE GEOLOGY IN ATLANTIC CANADA - A GOVERNMENT PERSPECTIVE." Proceedings of the Nova Scotian Institute of Science (NSIS) 43, no. 2 (November 1, 2006). http://dx.doi.org/10.15273/pnsis.v43i2.3638.
Full textDissertations / Theses on the topic "Dépôts sous vide"
Parbaile, Emilien. "Contribution à l'optimisation des techniques de dépôts sous vide de cellules solaires organiques." Limoges, 2009. https://aurore.unilim.fr/theses/nxfile/default/e6a50ed2-0fc2-4a6e-abd4-d838a9507b10/blobholder:0/2009LIMO4061.pdf.
Full textOrganic solar cells are low weight and particularly resistant to shocks (active layer and substrate in plastic). They are suitable for harsh environments such as military environment. Furthermore, conformability of these cells would permit to integrate them in mobile phones and other portable devices requiring high autonomies. The works of this thesis consisted to study different cell structures, improve reproducibility, realize cells with purified materials and make cells on flexible substrates in particular. The realization of cells on such substrates showed that the transition from a rigid substrate to a flexible substrate modifies only slightly the performance. The cells produced and characterized were mainly cells based on CuPc and C60. The deposition techniques used were spin coating and thermal vacuum sublimation. In addition, measurements of incident photon to current conversion efficiency (IPCE) showed that they depend on the incident light power. Other IPCE measurements permitted to estimate the phosphorescence time of C60 and determine the charge mobility in the CuPc. A radiometry study on the solar simulator was led in order to allow compare cell efficiencies with those of other laboratories. A method established permits to approach as close as possible the standard of illumination AM1. 5G with the simulator
Piot, Olivier. "Etude et application de l'évaporation sous vide et des dépôts ioniques à la réalisation de dépôts de chrome et de nitrure de chrome." Limoges, 1998. http://www.theses.fr/1998LIMO0019.
Full textClédat, Patrice. "Réalisation et étude comparative de dépôts céramiques obtenus par arc électrique sous vide ou dépôts ioniques : application à l'analyse du comportement anti-usure et des mécanismes de défaillance de revêtements PVD et CVD (TiN, CrN, DLC) sur outils de mise en forme." Limoges, 1999. http://www.theses.fr/1999LIMO4001.
Full textBessaudou, Annie. "Etude de la répartition en épaisseur et de la vitesse de croissance des dépôts obtenus par "ion plating"." Limoges, 1985. http://www.theses.fr/1985LIMO4003.
Full textGautier, Catherine. "Etude des mécanismes de croissance et des propriétés des dépôts à base de chrome réalisés par arc électrique sous vide." Limoges, 1997. http://www.theses.fr/1997LIMO0037.
Full textWang, Yan. "Réalisation par projection thermique de dépôts pour la protection contre l'érosion par cavitation." Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCA004/document.
Full textIn order to protect the hydraulic components from cavitation erosion phenomena, the parts are often coated by thermal spraying. Buck YSZ shows an excellent performance against cavitation erosion. However, the cavitation erosion resistance of YSZ coatings have vaguely been studied. Therefore, in this study, YSZ were manufactured with different thermal spraying processes and post-treated by laser remelting, then they were subjected to cavitation tests according to ASTM G32.The YSZ coating was first manufactured by atmospheric plasma spraying (APS). Various sizes of YSZ powder and different preheating temperatures of the substrate were studied to observe their effect on the cavitation behavior of the samples. The acoustic cavitation simulation of the Caflisch type has been used to estimate the speed of the water jet and the stresses exerted by the collapse of the bubbles on the surface of the samples. The cavitation results of the two YSZ and 304SS coatings were aslo studied to discuss cavitation damage of a thermally sprayed coating.Then in order to densify these samples, YSZ-NiCrBSi composite coatings containing from 5 to 25 wt% NiCrBSi in the mixture were manufactured with the APS process. The results of cavitation erosion show that low adhesion of NiCrBSi particles counterbalances the positive effect of decreasing porosity in these coatings. The YSZ coating was then post-treated by laser remelting and various laser parameters were tested to optimize their densification. It turns out that laser remelting produces a dense surface layer but also cracks inside the coatings. Exposed to the cavitation erosion test, it was observed significant removal of the remelted parts of the coating and, resulting in rapid mass loss. This is why epoxy has been used to infiltrate these cracks. The laser remelted and epoxy infiltrated coating exhibits a significant improvement in cavitation resistance. Finally, the vacuum plasma spraying method (VPS), which provides very dense coatings, was used to make the YSZ coating. A porosity coating of less than 1% was obtained. Due to the high temperature of the substrate during VPS projection, the interlamellar bonds are improved, contributing to a significant increase of cavitation resistance
Vinayo, Maria-Elena. "Contribution à l'étude de la projection atmosphérique et sous vide partiel de particules de carbures de tungstène avec liant cobalt ou nickel : application des dépôts au frottement sur acier." Limoges, 1985. http://www.theses.fr/1985LIMO0003.
Full textChaouki, Aïssam. "Structures fluorures InP "Dépôt sous vides et fluoruration"." Bordeaux 1, 1987. http://www.theses.fr/1987BOR10587.
Full textGelin, Simon. "Dépôt de films d'oxyde de silicium par vaporisation sous vide : dynamique moléculaire et expériences." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1117/document.
Full textSilica thin films are widely used as low index layers in antireflective coatings. In the ophthalmic industry, they are deposited at ambient temperature, by electron beam vaporization. This process generates large compressive stresses which make the coatings susceptible to damage. It is thus crucial to understand how these stresses emerge. However, this problem is highly complex because many process parameters may play a role: substrate and residual gas properties, characteristics of the deposition chamber, of the electron gun, growth rate,… Moreover, these parameters may depend on each other and affect several phenomena at the same time. In this thesis, numerical simulations and experiments are performed in order to identifiy the mechanisms responsible for the generation of compressive stresses during film growth. The experiments reveal three regimes of growth, depending on the residual gas pressure. Near ultra high vacuum, where the effect of residual gas is negligible, films grow under compression. Then, as pressure increases, incorporation of gas species in the films slightly compresses them. Eventually, when pressure is high enough so that vaporized particles are slowed down by collisions with gas particles, the level of compression significantly decreases; this rapidly masks the incorporation effect. Molecular dynamics simulations allow us to explore the ideal vacuum limit. By depositing silica films in a vast ensemble of conditions, we find that their compressive state of stress is solely controlled by the mean kinetic energy of incident particles. Comparison with experiments suggests that this energy is equal to a few eV, which is at least ten times greater than predictions from the literature on deposition. This unexpected result leads us to refute the idea that electron beam vaporization would be equivalent to simple themal heating. We confirm this experimentally, by comparing films deposited from silicon monoxide either thermally evaporated or vaporized using an electron beam: the formers grow under tension while the latters under compression. Finally, we explain the ejection of particles of a few eV as coming from the very low electrical conductivity of silica: under electronic irradiation, charges accumulate at its surface and accelerate the charged vaporized particles by Coulombian repulsions
Hojeij, Wassim. "Réalisation et caractérisations optoélectroniques de cellules photovoltaïques organiques." Limoges, 2007. https://aurore.unilim.fr/theses/nxfile/default/6e0c9ccc-22d0-4d73-b3b7-e2c9264fa719/blobholder:0/2007LIMO4062.pdf.
Full textThe development of efficient and stable organic solar cells constitutes the next major step in the development of organic electronics careers. These organic photovoltaic cells will be used for low cost energy production. They can be manufactured on flexible substrates, which will enable them to be easily integrated in electronics devices such as portable telephones and portable computers. A morphological study of multilayer and bulk heterojunction (BHJ) organic solar cells is carried out by studying the various parameters of realization such as the growth rate, the number of unit cells and the active layer thickness. Other studies are carried out on the optimisation of organic solar cells leading to a power conversion efficiency of 1,9 %. A study is undertaken on organic solar cells dimension effect on their photovoltaic behavior. The electromagnetic study of organic solar cell design shows that the electrical parameters depend on the geometric parameters of the active area