Carbosilane polymer precursors to silicon carbide ceramics

Details Carbosilane polymer precursors to silicon carbide ceramics Carbosilane polymer precursors to silicon carbide ceramics

1990-07-20

1992-10-06

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

525475, 528 10, 528 32, 556480, C08G 7712

Patent

active

051532956

ABSTRACT:
Polycarbosilane compositions, which can serve as silicon carbide precursors, are formed by a Grignard coupling reaction of a halomethylcarbosilane followed by reduction using a metal hydride. The polycarbosilane compositions that result have a substantially 1:1 silicon to carbon stoichiometry, are substantially non-cyclic and branched, and comprise the repeat units SiH.sub.3 CH.sub.2 --, --SiH.sub.3 CH.sub.2 --, .dbd.SiHCH.sub.2 --, and .tbd.SiCH.sub.2 --.

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S. Yajima et al., "Synthesis of Continuous Silicon Carbide Fibre with High Tensile Strength and High Young's Modulus", Journal of Materials Science 13 (1978) 2569-2576.

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