POST COATING TREATMENT OF SILICON CARBIDE COATED CARBON-CARBON SUBSTRATES

Abstract

A post treatment for protection from degradation at elevated temperatures of carbon and graphite materials to which have been applied a silicon carbide primary coating. The treatment comprising coating the substrate with a first film comprising monoaluminum phosphate, water, particulate silicon carbide, silicon carbide felt, alumina, and .boron; curing the first film, applying over the first film, a second film comprising monoaluminum phosphate, water, alumina and boron; curing the second film, applying a third film comprising water, sodium silicate, sodium borate, boron, particulate silicon carbide and silicon carbide felt; curing the third film, applying a fourth film comprising sodium borate, water, sodium silicate, boron and alumina which is cured after application.

Source: Google Patents

35 USC §181 Secrecy Order

Inventor

• 1DAVID M. SHUFORD

Sensitive facility: Arlington VA (defense contractors)