Simulation of Chemical Vapor Infiltration and Deposition Based on 3D Images: A Local Scale Approach

A numerical solution for the simulation of chemical vapor infiltration (CVI) of ceramic matrix composites is presented. This computational model requires a 3D representation of the preform. Gas transport and chemical reaction are simulated by a Monte Carlo random walk technique. The developed algori...

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Veröffentlicht in:Chemical vapor deposition 2011-12, Vol.17 (10-12), p.312-320
Hauptverfasser: Ros, William, Vignoles, Gérard L., Germain, Christian, Supiot, Philippe, Kokkoris, George
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Sprache:eng
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Zusammenfassung:A numerical solution for the simulation of chemical vapor infiltration (CVI) of ceramic matrix composites is presented. This computational model requires a 3D representation of the preform. Gas transport and chemical reaction are simulated by a Monte Carlo random walk technique. The developed algorithm can also be used for the determination of effective transport and reaction properties in a porous medium. It is firstly validated by considering the simple case of diffusion and reaction in a flat pore. Results of infiltration of an actual fiber arrangement are described and discussed. Extension to deposition on a thin substrate with asperities is also studied A numerical tool based on Monte Carlo Random Walks in 3D images is presented as a solution for direct simulation of chemical vapor infiltration and of chemical vapor deposition over a patterned substrate. The code can also be used for determination of effective transport and reaction properties in a porous medium. Validations and application cases are shown and discussed.
ISSN:0948-1907
1521-3862
DOI:10.1002/cvde.201106895