Chemical vapour infiltration
Consolidation and conversion of carbon powders into TiC by reactive chemical vapour infiltration
... Reactive Chemical Vapour Infiltration, a new gas phase ...carbide infiltration is homogeneous with depth but the powder is not consolidated, while at 1050°C the better conversion rate of ...
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Contribution of X-ray CMT and image processing to the modelling of pyrocarbon Chemical Vapour Infiltration
... of chemical vapour infiltration ...of chemical dynamics: the first step is a slow decomposition of the relatively stable methane molecule; then, rapid reactions follow, involving a variety of ...
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Modelling Chemical Vapour Infiltration in C/C composites: numerical tools based on µ-CT images
... by Chemical Vapour Infiltration ...of infiltration [6], namely: the effective gas diffusivity, either in continuum or in rarefied regime, the gas permeability to viscous flow in the case of ...
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TEM characterization of turbostratic and rhombohedral BN interphases synthesized by chemical vapour infiltration in SiC/SiC-Si composites
... by chemical vapour infiltration (CVI) from BCl 3 and NH 3 at 900 °C and 1200 °C within preforms made of a single 2D woven SiC fibre ...silicon infiltration resulted in laboratory-made ...
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Fibre-scale Modeling of C/C Processing by Chemical Vapour Infiltration Using Xray CMT Images and Random Walkers
... by Chemical Vapor Infiltration (CVI): a heated fibrous preform is infiltrated by the chemical cracking of a vapor precursor of the matrix material inside the pore space of the preform ...optimal ...
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Atomic relaxation and dynamical generation of ordered and disordered chemical vapour infiltration (CVI) SiC polytypes
... of chemical shifts in silicon carbide NMR ...A chemical shifts of 3C (kkk ) and of 6H or 15R (kkh) and a suggestion that a more refined NMR study of SiC would lead to recognize further splittings of the ...
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Chemical vapour infiltration and mechanical properties of carbon open-cell foams
... The pyrocarbon coatings were prepared using pure propane as the precursor. The selection of the substrate temperature T, total pressure P, and residence time t r is essential to control the microtexture of the ...
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Consolidation and conversion of carbon powders into TiC by reactive chemical vapour infiltration
... 950°C, seal-coating is not observed and the maximum of (here ~0.8) and density is not located just at the end surface of the sample; it is located here at a depth of about 10 µm (Fig. 9.a). At this temperature, the ...
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Synthesis of hexacelsian barium aluminosilicate by film boiling chemical vapour process
... film-boiling chemical vapour infiltration of a mixture of liquid alkoxides which contains all necessary species to synthesize BAS in a woven preform made of Nextel TM 312 alumina-boria-silica ...
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VAPOUR-LIQUID PHASE TRANSITION AND METASTABILITY
... of vapour-liquid phase transition and the relaxation towards the thermo- dynamical equilibrium in liquid-vapour ...problems, vapour bubbles may appear in a liquid through a decompression process, ...
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Vapour diffusion and condensation
... 0.286 0.286 0.264 0.054 0.030 0.030 Example. Consider a wall of 4-inch reinforced concrete with an inside finish of winch plaster over 1 inch of foamed plastic insulation that separates an internal environment of 73°F ...
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Chemical vapour deposition and atomic layer deposition of amorphous and nanocrystalline metallic coatings: towards deposition of multimetallic films
... From thermodynamic analysis, areas of investigation to generate a set of materials with the strongest propensity for amorphization as well as useful guidelines for the target phase material deposition are provided. ...
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Une infiltration péri-rénale gauche
... Service de médecine interne, hôpital Nord, chemin des Bourrely, 13915 Marseille cedex 20, Franceb. Service d’imagerie médicale, hôpital Nord, chemin des Bourrely, 13915 Marseille cedex 2[r] ...
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Water vapour permeation through clear coatings
... EFFECT OF RELATIVE HUMIDITY ON RATE OF PERMEATION THROUGH ALKYD FILMS AT 73OF. * Thickness of Film Per cent R.[r] ...
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Hydrological, chemical, and isotopic budgets of Lake Chad: a quantitative assessment of evaporation, transpiration and infiltration fluxes
... Chad chemical and isotopic data Data from Carmouze (1976), Chantraine and Lemoalle (1976a), Chantraine and Lemoalle (1976b), Chantraine (1977), Chantraine (1978), Gac (1980), Gaultier (2004), Lemoalle (1979), ...
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Charge effect of superparamagnetic iron oxide nanoparticles on their surface functionalization by photo-initiated chemical vapour deposition
... Previously, our group designed and developed a new, solvent-free and scalable surface functionalization technique called photo-initiated chemical vapor deposition (PICVD) (Dion et al. 2014). In this work, we carry ...
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Infiltration du radon dans les maisons
... l'intérieur des habitations, en particulier lorsque la concentration de la réserve d'eau en radon dépasse 10 000 pCi/L. Le problème peut se poser dans les maisons alimentées par un puit[r] ...
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Surfactant assisted chemical vapour generation of silver for AAS and ICP-OES: a mechanistic study
... Conclusions The CVG of transition metals has proved to be a viable technique for efficient introduction of analyte for atomic spectrometric techniques. There is definitely potential for further improvement. ...
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Full range of wettability through surface modification of single-wall carbon nanotubes by photo-initiated chemical vapour deposition
... of chemical and roughness changes) [ 44 ]. Aside from CA approaches, an inverse gas chromatography-surface energy analyzer (IGC-SEA) may be used to assess expected wettability [ 45 , 46 ]. For example, Li et ...
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Réparation des composites par infiltration de résine = Investigation of a composite repair method by liquid resin infiltration
... Abstract Nowadays airlines are bidding on composite materials for their high specific mechanical performances even if those materials are known for being impact-sensitive. The existing repair solutions are usually ...
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