Silicon oxycarbonitride by pyrolysis of polycyclosiloxanes in am

Details Silicon oxycarbonitride by pyrolysis of polycyclosiloxanes in am Silicon oxycarbonitride by pyrolysis of polycyclosiloxanes in am

1993-12-14

1995-08-01

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 95, 501 97, C04B 35571, C04B 35589

Patent

active

054380251

ABSTRACT:
An improved fiber reinforced glass composite includes a refractory fiber in a matrix of a nitrogen-containing black glass ceramic having the empirical formula SiN.sub.z C.sub.x O.sub.y where x ranges from greater than zero up to about 2.0, preferably 0.1 to 1.0, y ranges from 0.5 up to about 3.0, preferably 0.7 to 1.8, and z ranges from above zero up to about 1.5, preferably 0.2 to 1.0. Preferably the black glass ceramic is derived from cyclosiloxane monomers containing a vinyl group attached to silicon and/or a hydride-silicon group. The cyclosiloxane monomers are polymerized and then pyrolyzed in an ammonia-containing atmosphere to produce the nitrogen-containing black glass (silicon oxycarbonitride).

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Chemical Abstracts, vol. 110, No. 8, Feb. 20, 1989, Columbus, Ohio Abstract No. 62312b.
P. J. Heimann et al., "Polymeric Routes to Silicon Carbide and Silicon Oxycarbide CMC", Ceramic Eng. & Sc. Proceedings, vol. 12, No. 7/8 8/91 p. 1292-1303.
Prewo et al., Ceramic Bulletin, vol. 65, No. 2, 1986 no month.

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