Ceramic matrix composite material

Details Ceramic matrix composite material Ceramic matrix composite material

1994-07-22

1996-04-23

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 95, 501 97, C04B 35577

Patent

active

055103030

ABSTRACT:
A ceramic matrix composite material comprising a matrix containing silicon carbide as the primary component and silicon nitride as the secondary component is disclosed. The silicon nitride includes not more than 1% by weight of iron and reinforcements mixed and dispersed. The ceramic matrix composite material is manufactured, for example, by forming a matrix containing reaction sintered silicon carbide as the primary component and nitriding the free metal silicon produced in the sintering process so that the free metal silicon will be converted to fine silicon nitride particles. Said metal silicon used for reaction sintering already contains iron. These processes enable the containing of a comparatively large amount of reinforcements, as well as the improvement of heat resistance of the sintered compact and the suppression of the deterioration of reinforcements.

REFERENCES:
patent: 2636826 (1953-04-01), Nicholson
patent: 4919868 (1990-04-01), Huang
patent: 4937211 (1990-06-01), Washburn
patent: 5134097 (1992-07-01), Niihara et al.
William R. Moser, et al., "Kinetics of Iron-Promoted Silicon Nitridation" Journal of Materials Research, vol. 1, No. 4, Aug. 1986, pp. 797-802.
"X-Ray Photoelectron Spectroscopy of In-SITU Fractured Reaction Bonded Silicon Nitride", Donley et al., Mat. Res. Soc. Symp. Proc., vol. 60, pp. 489-497, 1986. No Month.
"Silicon Nitride and Carbide Produced from Rice Husk", Azuma et al., Proceedings of the Annual Meeting of The Ceramic Society of Japan, pp. 377, 1990. No Month.

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