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The interaction of chemical kinetics and diffusion in the dynamics of chemical vapor infiltration

Published online by Cambridge University Press:  31 January 2011

Stanley Middleman
Stanley Middleman
Affiliation:
Department of AMES/Chemical Engineering, University of California-San Diego, La Jolla, California 92093
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Abstract

The classical model of Chemical Vapor Infiltration (CVI) treats diffusion and surface reaction in a representative cylindrical pore. Two significant modifications to that approach are presented herein. One accounts for more complex chemistry by allowing for both gas-phase and surface reactions which lead to film growth. The other couples the pore model to a reactor model for the region external to the porous preform. The results demonstrate that it is possible to select chemical schemes that yield densification from the interior to the exterior of the preform, thus avoiding premature trapping of interior voids.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 6 , December 1989 , pp. 1515 - 1524
Copyright
Copyright © Materials Research Society 1989

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References

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