Reaction inhibited-silicon carbide fiber reinforced high temperature glass-ceramic composites and a method of manufacture of the same.,申请号EP19830630083-传众专利搜索

Reaction inhibited-silicon carbide fiber reinforced high temperature glass-ceramic composites and a method of manufacture of the same.

申请公布号：EP0095433(A1)

申请号：EP19830630083

申请日期：1983.05.17

申请公布日期：1983.11.30

申请人：

UNITED TECHNOLOGIES CORPORATION;CORNING GLASS WORKS

发明人：BRENNAN, JOHN J.;CHYUNG, KENNETH;TAYLOR, MARK P.

分类号：C03C10/00;C03C14/00;(IPC1-7):03C14/00;01F9/08;03C3/22

主分类号：C03C10/00

摘要：<p>A silicon carbide fiber reinforced glass-ceramic matrix composite is disclosed having high strength, fracture toughness, and improved oxidative stability even at hight temperature use, e.g., in excess of 1000 DEG C. The composite is made up of a plurality of glass-ceramic layers, each layer reinforced with a plurality of unidirectional continuous length silicon carbide or discontinuous SiC fibers. The composite is formed by starting with the matrix material (preferably lithium aluminosilicate) in the glassy state and converting it from the glassy state to the crystalline state after densification of the composite. Ta or Nb compounds are added to the matrix composition prior to consolidation to form a reaction or diffusion barrier around the SiC fiber, resulting in composites with high temperature oxidation stability. Substitution of at least part of the Li2O in the matrix with MgO results in an even higher temperature stable composite. e.g. up to about 1200 DEG C.</p>