Coated silicon-based ceramic composites and method for making sa

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156662, 427309, 427376A, 428446, 428539, 428334, 428335, 428336, B32B 904

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active

041090500

ABSTRACT:
A method is provided for making silicon-based ceramic composites having reduced tendency to form complex silicides when in contact with high performance metals or metallic alloys at elevated temperatures. The surface of the silicon-based ceramic composite, such as silicon carbide-silicon matrix composite, is etched, treated with an inorganic oxide mixture and fired. Improved performance is provided when the resulting composite is used in a specific application in contact with a high performance metal or metallic alloy, such as a gas turbine bucket.

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