Silicon nitride sintered bodies

Details Silicon nitride sintered bodies Silicon nitride sintered bodies

1987-02-26

1989-05-16

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 98, C04B 3558

Patent

active

048309915

ABSTRACT:
Silicon nitride sintered bodies are disclosed herein which each contain an intergranular phase. The intergranular phase contained in the sintered body is crystallized into diopside structure type crystals and apatite structure type crystals. The silicon nitride sintered bodies have excellent density and mechanical strength as well as extremely excellent static fatigue characteristics, and therefore are applicable as various mechanical structural parts such as engine parts, gas turbine parts, etc.

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patent: 4506021 (1985-03-01), Jack et al.
patent: 4535063 (1985-08-01), Matsuhiro et al.
838 American Ceramic Society Bulletin, "Fabrication and Properties of Dense Polyphase Silicon Nitride", vol. 62 (1983) Dec., No. 12, Columbus, Ohio.
838 American Ceramic Society Bulletin, "Si.sub.3 N.sub.4 -Ce.sub.2 O.sub.3 -SiO.sub.2 Materials:Phase Relations and Strength", vol. 59 (1980) Feb., No. 2, Columbus, OH.
836 Journal of the American Ceramic Society, "The System Si.sub.3 N.sub.4 -SiO.sub.2 -Y.sub.2 O.sub.3 ", vol. 63 (1980), Jan., Feb., No. 1-2, Columbus, OH.
Journal of the American Ceramic Society, "Fracture of Yhria-Doped, Sintered Reaction-Bonded Silicon Nitride", vol. 68 (1985) Jul., No. 7, Columbus, OH.
6053 Journal of Materials Science, "Development of Microstructure During the Fabrication of Si.sub.3 N.sub.4 by Nitridation and Pressureless Sintering of Si:Si.sub.3 N.sub.4 Compacts", vol. 20 (1985) Oct., No. 10, London, Great Britain.
Giachello, A. et al., "Sintering and Properties of Silicon Nitride Containing Y.sub.2 O.sub.3 and MgO.sub.3 " Ceramic Bull., 59(2) 1980, pp. 1212-1215.

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