COMPOSITION AND METHOD FOR FORMING A PROTECTIVE COATING ON CARBON- CARBON CHEMICAL VAPOR DEPOSITION DENSIFIED SUBSTRATES

Abstract

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 is a mixture of particulate silicon, silicon carbide and boron. The mixture contains between about 25% and 40% silicon by weight of the total composition, between about 50% and 70% by weight silicon carbide by weight of the total composition, between about 1% and 15% boron by way of the total composition and a minor amount of magnesium. The compositions can be used in a method for forming a primary protective coating on carbonaceous substrates including, in particular, reinforced carbon-carbon materials produced using chemical vapor deposition techniques.

Source: Google Patents

35 USC §181 Secrecy Order

Inventor

• 1DAVID M. SHUFORD