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Reactive Chemical Vapour Deposition of titanium carbide from H2-TiCl4 gas mixture on pyrocarbon: A comprehensive study
Language
EN
Article de revue
This item was published in
Physics Procedia. 2013, vol. 46, p. 79-87
English Abstract
In Reactive Chemical Vapour Deposition (RCVD), the absence of one element of the deposited carbide in the initial gas phase involves the consumption/conversion of the solid substrate. In this way, the growth of a continuous ...Read more >
In Reactive Chemical Vapour Deposition (RCVD), the absence of one element of the deposited carbide in the initial gas phase involves the consumption/conversion of the solid substrate. In this way, the growth of a continuous carbide layer on the substrate requires solid-phase diffusion of the reagent. In this work, a parametric study of the RCVD of titanium carbide from pyrocarbon (PyC) and an H2-TiCl4 mixture has been carried out. Conversion ratio, PyC consumption and carbide layer growth kinetics have been determined at 1000°C. The influence of the H2/TiCl 4 dilution ratio has been also investigated. The apparent inter-diffusion coefficient of the carbon through the TiC deposited layer and the direct apparent reaction rate were determined from a comparison between simulations based on a Deal-Grove-type model and the experimental results. The study has been completed with FTIR spectrometry analyses of the gases.Read less <
English Keywords
CVD
R-CVD
TiC coating
Pyrocarbon
Solid state diffusion
FTIR
Simulation

