Title
A Reduced Reaction Model for Carbon Cvd/cvi Processes
Document Type
Article
Publication Date
4-2002
Abstract
Carbon–carbon composites are produced by chemical vapor deposition/chemical vapor infiltration (CVD/CVI) processes. Models of carbon–carbon composite production processes will help reduce production costs. Reliable process models must, however, include details of the gas phase kinetics in order to identify optimal conditions. We have combined detailed gas phase kinetics, surface kinetics, and a pore closure model to predict pore geometry changes with respect to time. To determine the dominant gas phase kinetics, we reduced a large set of reactions to a minimal set using a sensitivity, rate, and dimensional analysis approach. These robust and relatively fast techniques can be used under a variety of conditions, including those within the pores of the composite. The process model shows that the deposition profile depends on the kinetic model chosen. Using the more realistic reaction model, conditions for uniform, or inside-out, densification can be suggested.
Publication Title
Carbon
Volume
40
Issue
5
First Page
675
Last Page
683
Recommended Citation
Birakayala, Narayana and Evans, Edward, "A Reduced Reaction Model for Carbon Cvd/cvi Processes" (2002). Chemical, Biomolecular, and Corrosion Engineering Faculty Research. 407.
https://ideaexchange.uakron.edu/chemengin_ideas/407