Process for the production of ceramics

Details Process for the production of ceramics Process for the production of ceramics

1986-10-17

1987-10-27

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 66, 264 67, C04B 3332

Patent

active

047028696

ABSTRACT:
Less dispersion and more homogenized ceramics are produced by sintering ceramic materials, in particular, containing silicon nitride or silicon carbide as a predominant component with other assistants or additives, machining the surface of the resulting sintered compact and then subjecting the sintered compact to a heat treatment for homogenizing in a non-oxidizing atmosphere such as nitrogen or argon gas at a temperature of from the mass-transfer temperature at which the mass-transfer takes place in the interior of the ceramics to blunt the fine point of a crack to the sintering temperature of the ceramics.

REFERENCES:
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patent: 3998646 (1976-12-01), Weaver
patent: 4031178 (1977-06-01), Johnson et al.
patent: 4209478 (1980-06-01), Wooten et al.
patent: 4346049 (1982-08-01), Coppola et al.
patent: 4354990 (1982-10-01), Martinengo et al.
patent: 4376742 (1983-03-01), Mah
Petrovic et al., The Strength of Silicon Nitride after Exposure to Different Environments, in Ceramics for High-Performance Applications (1974) pp. 397-414.
Ritter et al., Application of Fracture Mechanics in Assuring Against Fatigue Failure of Ceramic Components, in Ceramics for High-Performance Applications III, 1983, pp. 503-533.

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