Abstract
The reaction of silicon‐based ceramics with 2% Cl2/Ar and 1% Cl2/1% to 20% O2/Ar at 950 °C was studied with thermogravimetric analysis and high‐pressure mass spectrometry. Pure Si, SiO2, several types of SiC, and Si3N4 were examined. The primary corrosion products were SiCl4(g) and SiO2(s) with smaller amounts of volatile silicon oxychlorides. The reactions appear to occur by chlorine penetration of the SiO2 layer, and gas‐phase diffusion of the silicon chlorides away from the sample appears to be rate limiting. Pure SiO2 shows very little reaction with Cl2. SiC with excess Si is more reactive than the other materials with Cl2, whereas SiC with excess carbon is more reactive than the other materials with Cl2/O2. Si3N4 shows very little reaction with Cl2. These diferences are explained on the basis of thermodynamic and microstructural factors.
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Dates
Type | When |
---|---|
Created | 20 years, 5 months ago (March 8, 2005, 1:33 p.m.) |
Deposited | 1 year, 9 months ago (Nov. 22, 2023, 4:56 p.m.) |
Indexed | 2 months, 1 week ago (June 17, 2025, 10:45 p.m.) |
Issued | 36 years, 8 months ago (Dec. 1, 1988) |
Published | 36 years, 8 months ago (Dec. 1, 1988) |
Published Online | 20 years, 5 months ago (March 8, 2005) |
Published Print | 36 years, 8 months ago (Dec. 1, 1988) |
@article{MARRA_1988, title={Reactions of Silicon‐Based Ceramics in Mixed Oxidation Chlorination Environments}, volume={71}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/j.1151-2916.1988.tb05793.x}, DOI={10.1111/j.1151-2916.1988.tb05793.x}, number={12}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={MARRA, JOHN E. and KREIDLER, ERIC R. and JACOBSON, NATHAN S. and FOX, DENNIS S.}, year={1988}, month=dec, pages={1067–1073} }