초록 ▼

Carbon-carbon composites are prepared to receive a subsequent protective coating by having a thin coating (0.1 to 5 mils) of chemically vapor deposited (CVD) SiC applied to its surface. The SiC layer improves the performance of subsequent protective coatings (especially pack produced SiC conversion

Carbon-carbon composites are prepared to receive a subsequent protective coating by having a thin coating (0.1 to 5 mils) of chemically vapor deposited (CVD) SiC applied to its surface. The SiC layer improves the performance of subsequent protective coatings (especially pack produced SiC conversion coatings), especially in the case of carbon-carbon composites having a negative coefficient of thermal expansion.

대표청구항 ▼

A carbon-carbon composite article having carbon fibers surrounded by a carbon matrix characterized in that diffusion of silicon within the fibers occurs at a different rate than does the diffusion of silicon within the matrix, said article being adapted to receive a subsequent uniform protective coa

A carbon-carbon composite article having carbon fibers surrounded by a carbon matrix characterized in that diffusion of silicon within the fibers occurs at a different rate than does the diffusion of silicon within the matrix, said article being adapted to receive a subsequent uniform protective coating, said article comprising: carbon-carbon composite substrate having on its outer surface, a 0.1 to 5 mil layer of CVD SiC.