Formation of a ceramic composite by centrifugal casting

Details Formation of a ceramic composite by centrifugal casting Formation of a ceramic composite by centrifugal casting

1990-10-26

1993-11-16

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 97, 264311, C04B 3558, C04B 3576

Patent

active

052623661

ABSTRACT:
A ceramic compact having excellent high temperature strength, toughness and reliability, which comprises a matrix preferably composed predominantly of silicon nitride and ceramic fibers uniformly dispersed in the matrix and orientated in a desired direction, said matrix and fibers being closely bonded by sintering. This compact is produced, for example, by preparing a shaped body of silicon, for example, in which ceramic fibers are uniformly dispersed by centrifugal casting and then heating and nitriding the shaped body in a nitrogen atmosphere to form a fiber-reinforced silicon nitride sintered compact. The ceramic fibers may include such fibers as aluminum oxide or silicon carbide fibers. Sintering assistants, such as silicon nitride, may be used to prepare the sintered compact.

REFERENCES:
patent: 3607608 (1971-09-01), Siefort
patent: 3689614 (1972-09-01), Bortz et al.
patent: 4465650 (1984-08-01), Ohno
patent: 4572902 (1986-02-01), Matano et al.
patent: 4579699 (1986-04-01), Verzemnieks
patent: 4869943 (1989-09-01), Corbin et al.
patent: 4961757 (1990-10-01), Rhodes et al.

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