Silicon nitride sintered body

Details Silicon nitride sintered body Silicon nitride sintered body

1989-04-07

1990-12-18

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 97, C04B 3558

Patent

active

049786458

ABSTRACT:
A silicon nitride sintered body composed of .alpha.'-silicon nitride and .beta.'-silicon nitride, which are present in the ratio of 0.05-0.50 to 0.50-0.95 in terms of the peak strength ratio of X-ray diffraction, and have very small crystal grain size and specific compositions. The sintered body has high strength and high toughness and is superior in oxidation resistance.

REFERENCES:
patent: 4547470 (1985-10-01), Tanase et al.
patent: 4558018 (1985-12-01), Matsuhiro et al.
patent: 4711644 (1987-12-01), Yeckley et al.
patent: 4818635 (1989-04-01), Ekstrom et al.
Journal of Materials Science, (1979), vol. 14, pp. 1749-1751, "Composition and Stability of Y-Si-Al-O-N Solid Solutions Based . . . ", H. C. Starck.

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