Fiber reinforced ceramic matrix composites exhibiting improved high- temperature strength

摘要

Fiber-reinforced ceramic matrix composite products comprising boron- nitride-coated reinforcing silicon carbide fibers disposed in a substantially non-porous alkaline earth aluminosilicate glass-ceramic matrix are disclosed, the matrix comprising triclinic anorthite (CaO,SrO. Al.sub.2 O.sub.3.2SiO.sub.2) as the principal crystal phase and the products exhibiting unexpectedly good resistance to high-temperature degradation.