Paralinear Oxidation of CVD SiC in Water Vapor

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The oxidation kinetics of CVDSiC were monitored by thermogravimetric analysis (TGA) in a 50% H2O/50% O2 gas mixture flowing at 1.4 cm/s for temperatures between 1200” and 1400°C. Paralinear weight change kinetics were observed as the water vapor oxidized the SiC and simultaneously volatilized the silica scale. The long-term degradation rate of SiC is determined by the volatility of the silica scale. Rapid SiC surface recession rates were estimated from these data for actual aircraft engine combustor conditions.

Document Type: Research Article


Affiliations: 1: Department of Chemical Engineering, Cleveland State University, Cleveland, Ohio 44115 2: NASA-Lewis Research Center, Cleveland, Ohio 44135

Publication date: January 1, 1997

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