Preceramic compositions and ceramic products

Details Preceramic compositions and ceramic products Preceramic compositions and ceramic products

1990-01-10

1993-01-12

Nelson, Peter A.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 92, 501 96, 558296, 427228, 10628723, 524424, C04B 3552, C09K 1518

Patent

active

051790483

ABSTRACT:
Preceramic polymer dispersions which have particular utility in providing protective ceramic coatings on carbon/carbon composites, graphite, carbon fibers, and other normally oxidizable materials are prepared by dispersing about 0-3 parts by weight of aluminum-silicon eutectic, about 0-4 parts by weight of silicon carbide, about 1.5-5 parts by weight of silicon boride, and about 0.4-5 parts by weight of silicon metal in a solution of an organoborosilazane polymer in an organic solvent, the organoborosilazane polymer being the product obtained by reacting about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polysilazane.

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patent: 4482689 (1984-11-01), Haluska
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patent: 4659850 (1987-04-01), Arai et al.
patent: 4677082 (1987-06-01), Alford et al.
patent: 4689252 (1987-08-01), Lebron et al.
patent: 4705837 (1987-10-01), Seyferth et al.
patent: 4737382 (1988-04-01), Katzman
patent: 4767728 (1988-08-01), Riccitiello et al.

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