Silicon nitride-cordierite ceramic article, and process of manuf

Details Silicon nitride-cordierite ceramic article, and process of manuf Silicon nitride-cordierite ceramic article, and process of manuf

1983-08-09

1985-09-17

Poer, James

Compositions: ceramic

Ceramic compositions

Refractory

501 98, C04B 3558

Patent

active

045421099

ABSTRACT:
A silicon nitride-cordierite article, and process for fabricating is described. The silicon nitride imparts a high mechanical strength, and the cordierite contributes to a lower thermal conductivity making the composition especially useful for internal parts of a diesel engine. The mechanical strength can be increased by crystallizing the continuous cordierite glassy phase of the article. Crystallization of the continuous cordierite glassy phase is accomplished by the addition of a nucleating agent such as zirconium dioxide in the formulation and a subsequent reheating step after densification.

REFERENCES:
patent: 4070198 (1978-01-01), Chyung et al.
patent: 4104442 (1978-08-01), Sussmuth
patent: 4143182 (1979-03-01), Henney et al.
patent: 4283360 (1981-08-01), Henmi et al.
Chemical Correspondence, May 20, 1983, vol. 1, Item 0055, p. 10.

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