Carbon fiber reinforced silicon nitride based nanocomposite mate

Details Carbon fiber reinforced silicon nitride based nanocomposite mate Carbon fiber reinforced silicon nitride based nanocomposite mate

1992-10-13

1994-12-27

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 92, 501 95, 501 97, 501 98, 501 99, 501100, C04B 3552

Patent

active

053765990

ABSTRACT:
Carbon fiber reinforced silicon nitride based nanocomposite material is produced by mixing a powder mixture of silicon nitride powders (with or without alumina powders), and fine silicon carbide powders, with a solution of a preceramic polymer containing silicon and nitrogen, to form a solution for impregnation, by passing carbon fibers through the solution to produce a mass of impregnated carbon fibers, forming the mass to a desired shape and by sintering in an inert atmosphere. Ultra-high strength and toughness are produced due to reinforcement by nanocompositization of the matrix phase, that by dispersion of fine particles and that by long carbon fibers, part of matrix phase is generated by thermal cracking of preceramic polymer.

REFERENCES:
patent: 5024979 (1991-06-01), Debaig-Valade et al.
English translation of Japanese Patent Publ. No. 59-137366 (Aug., 1984).

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