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Analytical Simulation of an Improved Cvi Process for Forming Highly Densified Ceramic Composites

Published online by Cambridge University Press:  21 February 2011

Nyan-Hwa Tai  and
Tsu-Wei Chou
Nyan-Hwa Tai
Affiliation:
Center for Composite Materials and Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716
Tsu-Wei Chou
Affiliation:
Center for Composite Materials and Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716
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Abstract

A model for chemical vapor infiltration (CVI) under pressure and temperature gradients is applied to the study of deposition of SiC from the pyrolysis of CH3SiCl3 within a 3-D woven fibrous preform. The model considers the infiltration of reactants into a preform with temperature gradients by applying a pressure gradient between the vapor inlet and outlet; it also takes into account the variation in concentration of the vapor precursor. A quasi-steady state approach has been adopted to simulate the matrix deposition in a 3-D unit cell. The density distribution, consolidation profile, and total fabrication period have been theoretically predicted.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 168 , 1989 , 61
Copyright
Copyright © Materials Research Society 1990

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