Compositions: ceramic – Ceramic compositions – Devitrified glass-ceramics
Patent
1994-12-29
1997-02-25
Group, Karl
Compositions: ceramic
Ceramic compositions
Devitrified glass-ceramics
501 9, 501 32, 428367, 428384, C03C 1006, C03C 1400
Patent
active
056058683
ABSTRACT:
This invention is directed to the fabrication of SiC fiber reinforced, ceramic matrix composite articles exhibiting superior high temperature oxidative stability, those articles comprising:
(a) a glass-ceramic matrix wherein alkali metal and/or alkaline earth metal aluminosilicate crystals constitute the predominant crystal phase;
(b) a fiber reinforcing phase comprising SiC fibers coated with an alkali metal and/or alkaline earth metal sheet silicate entrained within said glass-ceramic matrix; and
(c) a borosilicate glass phase dispersed as an intergranular glass within said glass-ceramic matrix, said borosilicate glass phase generally being present in an amount sufficient to provide an intergranular glass phase therein.
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A. G. Evans, F. W. Zok, and J. Davis in "The Role of Interfaces in Fiber Reinforced Brittle Matrix Composites", Composite Science and Technology, 42, (1991) p. 3.
Chyung Kenneth
Dawes Steven B.
Larsen David C.
Stewart Ronald L.
Corning Incorporated
Group Karl
Janes Jr. Clinton S.
Murphy Edward F.
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