C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
117/162, 261/6
C04B 35/56 (2006.01) C04B 41/50 (2006.01) C04B 41/52 (2006.01) C04B 41/87 (2006.01) C04B 41/89 (2006.01)
Patent
CA 1233836
26 COMPOSITION AND METHOD FOR FORMING A PROTECTIVE COATING ON CARBON-CARBON SUBSTRATES ABSTRACT OF THE INVENTION In accordance with the invention, a composition of matter is provided for forming a coating for protecting carbonaceous substrates from degradation at elevated temperatures. The composition of matter is a mixture of particulate silicon, silicon carbide and alumina. The mixture contains between about 40% and 50% silicon by weight of the total composition, between about 30% and 50% silicon carbide by weight of the total composition and between about 20% and 30% alumina by weight of the total composition. A method is provided for forming a primary protective coating on carbonaceous substrates utilizing the aforesaid mixture. An enhancement coating is provided for sealing the primary coating in applications where the substrate will be subjected to elevated temperatures and temperature cycling.
460096
Kirby Eades Gale Baker
Lockheed Martin Corporation
Ltv Aerospace & Defense Company
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