Amorphous silicon oxycarbide and crystalline silicon carbide fib

Details Amorphous silicon oxycarbide and crystalline silicon carbide fib Amorphous silicon oxycarbide and crystalline silicon carbide fib

1997-04-22

1998-11-24

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Extrusion molding

264473, 264477, 264625, 264627, 264 82, 264 83, C04B 35571

Patent

active

058402420

ABSTRACT:
The present invention relates to a method for preparing a ceramic fiber from alkenyl or alkynyl functional resins and to the ceramic fibers produced therefrom. The method comprises (A) forming a fiber from a siloxane resin comprised of R.sup.1.sub.a R.sup.2.sub.b RSiO.sub.(3-a-b)/2 units wherein R is an unsaturated carbon group; each R.sup.1 is selected from the group consisting essentially of an aryl group having from 6 to 10 carbon atoms and functional derivatives thereof; each R.sup.2 is selected from the group consisting essentially of an alkyl group having from 1 to 4 carbon atoms and functional derivatives thereof; a has a value of 0, 1 or 2; b has a value of 0, 1, or 2 with the proviso that a+b <2; (B) curing the fiber by exposing the fiber to high energy radiation to render it non-fusible; and (C) heating the non-fusible fiber in an inert environment to a temperature above about 800.degree. C. to convert it to a ceramic fiber.

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High Temperature Cehmistry of the Conversion of Siloxanes to Silicon Carbide. Burns, Taylor, Xu, Zangvil, Zank: Dow Corning Corporation, Chemistry of Materials 1992. vol. 4 #6, pp. 1313-1323.

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