Characterization of Corrosion Mechanisms Occurring in a Sintered Sic Exposed to Basic Coal Slags |
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| Authors: | M K FERBER J OGLE V J TENNERY T HENSON |
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| Affiliation: | Oak Ridge National Laboratory, Metals and Ceramics Division, Oak Ridge, Tennessee 37831 |
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| Abstract: | The high-temperature reactions occurring between an a-Sic and a basic coal slag were examined. The resulting corrosion behavior was found to involve at least three mechanisms, including passivation of the Sic via SiO2 formation, dissolution of the SiO2 by the coal slag, and formation of a localized Fe-Ni silicide. This mechanism, which dominated when the slag thickness exceeded 100 μm, was also responsible for the degradation in high-temperature strength. |
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