PRECERAMIC COMPOSITION AND CERAMIC PRODUCT

Abstract

Preceramic compositions which have particular utility in providing protective ceramic coatings on normally oxidizable materials, such as carbon/silicon carbide and other carbon-containing composites and other materials, are obtained by dispersing solid particles comprising aluminum nitride particles in an organic solvent solution of an organoborosilazane polymer obtainable by reacting about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polysilazane in an organic solvent. Ceramic coatings derived from the dispersions may be overcoated with ceramics derived from other preceramic polysilazane compositions to provide even greater protection to the substrates.

Source: Google Patents

35 USC §181 Secrecy Order

Inventor

• 1GENEVIEVE S. LUM