초록

Disclosed are novel ceramic matrix composites in which coated refractory fibers are imbedded in a ceramic matrix derived from a modified hydrogen silsesquioxane resin.

대표청구항 ▼

[ That which is claimed is:] [1.] A method of forming a fiber-reinforced ceramic matrix composite comprising:(a) impregnating an assembly of refractory fibers having an interfacial coating thereon with a preceramic matrix mixture comprising modified hydrogen silsesquioxane resin having the structure

[ That which is claimed is:] [1.] A method of forming a fiber-reinforced ceramic matrix composite comprising:(a) impregnating an assembly of refractory fibers having an interfacial coating thereon with a preceramic matrix mixture comprising modified hydrogen silsesquioxane resin having the structure (HSiO.sub.1.5).sub.x (R.sub.1 R.sub.2 R.sub.3 SiO.sub.0.5).sub.y wherein R.sub.1, R.sub.2, and R.sub.3 are independently selected from hydrogen, alkyls and aryls, and x is 0.25 to 0.99, y is 0.75 to 0.01 and x+y=1.0;(b) forming the impregnated assembly of fibers into the desired shape;(c) curing the formed impregnated assembly of fibers;(d) heating the cured impregnated assembly of fibers of (c) to a temperature of at least 1000.degree. C. in an inert atmosphere for a time effective to convert the modified hydrogen silsesquioxane resin to a ceramic.