Composition for SiC pack cementation coating of carbonaceous substrates
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United States of America Patent
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May 11, 1993
Grant Date -
N/A
app pub date -
Jun 19, 1989
filing date -
Jun 19, 1989
priority date (Note) -
Expired
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Abstract
This invention relates to an improved pack mixture composition useful for the formation of a SiC pack cementation coating for protecting a carbonaceous substrate from degradation at temperatures above about 800.degree. F. comprising: Si from about 15% to about 50% by weight of the total composition; B up to about 25% by weight of the total composition when present; SiO.sub.2 from about 0.01% to about 3% by weight of the total composition; and SiC from about 40% to about 85% by weight of the total composition and method thereof. The invention further relates to a cork release agent composition for providing the clean release of spent pack composition from a carbonaceous substrate.
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