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About modelling chemical vapour infiltration of pyrocarbon

✍ Scribed by T.-A. Langhoff; H. Andrä; E. Schnack

Publisher
John Wiley and Sons
Year
2002
Weight
116 KB
Volume
1
Category
Article
ISSN
1617-7061

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✦ Synopsis

About modelling chemical vapour infiltration of pyrocarbon

Chemical vapour infiltration (CVI) is an important method for producing carbon reinforced carbon fibres (CFC). Thereby, initially gaseous carbon is deposited on the surface of a porous substrate. Mathematically, one has to deal with a moving boundary problem formed by the interface between the gas phase and the substrate surface. Within the gas phase, a nonlinear convection-diffusion-reaction-system (cdr-system) with a reduced reaction scheme to model the chemical reactions has to be solved. One-dimensional simulations of deposition profiles within cylindrical model pores including an explicit construction of the moving boundary are performed for different values of the process parameters. Based on these calculations geometries and conditions for complete infiltration of the pores can be identified.

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