Ceramics of silicon nitride

Details Ceramics of silicon nitride Ceramics of silicon nitride

1977-04-08

1978-01-03

McCarthy, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 65, 106 735, 264 65, C04B 3332, C04B 3558

Patent

active

040664686

ABSTRACT:
Ceramic products composed essentially of a novel silicon nitride solid solution, which have high heat resistance, high abrasion resistance and low thermal expansion are obtained by sintering mixed powders of silicon nitride, alumina and aluminum nitride. The sintering includes heating said mixed powders at a temperature between 1650.degree. C and 2000.degree. C under a high pressure or no pressure. During the heating most of the alumina and aluminum nitride are occluded in silicon nitride and said ceramics products composed of silicon nitride solid solution are formed.

REFERENCES:
patent: 3837871 (1974-09-01), Weaver
Jack, K. H. et al., "Ceramics Based on the Si-Al-O-N and Related Systems" Nature-Physical Science 238, pp. 28-29, July 10, 1972.
Oyama, Y. "Solid Solution in the Ternary System, SI.sub.3 N.sub.4 -AlN-Al.sub.2 O.sub.3 " Japan, J. Appl. Phys. 11, No. 5 (1972) pp. 760-761.
Masaki, H. et al., "Low Temperature Synthesis of Silicon Nitride Solid Solution" Japan, J. Appl. Phys. 14, No. 2 (Feb. 1975) pp. 301-302.

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