REINFORCEMENT OF ALKALINE EARTH ALUMINOSILICATE GLASS-CERAMICS

摘要

The present invention is directed to SiC whisker and/or fiber reinforced glass-ceramic matrix composite articles wherein an alkaline earth aluminosilicate constitutes the predominant crystal phase. More particularly the composite articles will consist essentially of 10-60% by weight SiC whiskers and/or 15-70% by volume ceramic fibers and the glass-ceramic matrix will consist essentially, by weight on the oxide basis, of -CaO 0-25 MgO 0-15 -SrO 0-30 Na2O 0-4 -CaO + SrO 10-30 K2O 0-6 -Al2O3 25-38 TiO2 0-12 -SiO2 35-60 ZrO2 0-15 -BaO 0-25 As2O3 0-3 -BaO + MgO + Na2O + K2O + TiO2ZrO2 + As2O3 0-30 - The preferred predominant crystal phase is selected from the group of anorthite and its pseudo-binaries, with mullite, cordierite, barium osumilite, and albite solid solution.