Process for the preparation of dispersion ceramics

Details Process for the preparation of dispersion ceramics Process for the preparation of dispersion ceramics

1980-07-14

1982-03-30

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

264332, 501 97, 501105, 501152, 501153, 501154, C04B 3500, C04B 3510, C04B 3548, C04B 3552

Patent

active

043222498

ABSTRACT:
In a process for the production of dispersion ceramics by sintering or hot pressing of a mixture of a matrix-forming ceramic material and of at least one ceramic embedment material dispersible therein which at the sintering temperature of the ceramic and at room temperature is present in different enantiotropic solid modifications of different densities, a ceramic embedment material is employed which is divided into at least two groups of different, substantially uniform particle sizes, each group having different lower phase-transition temperatures.

REFERENCES:
patent: 3247000 (1966-04-01), Taylor
patent: 3740340 (1973-06-01), Riley et al.
patent: 3916585 (1975-11-01), Barks
patent: 4073845 (1978-02-01), Buljan et al.
patent: 4125407 (1978-11-01), Ueno
patent: 4218253 (1980-08-01), Dworak et al.
Claussen, N. "Fracture Toughness of Al.sub.2 O.sub.3 with an Unstabilized ZrO.sub.2 Dispersed Phase" J. Am. Cer. Soc. 59 (1976) pp. 49-51.
Claussen, N. et al. "Toughening of Ceramic Composites by Oriented Nucleation of Microcracks" J. Am. Cer. Soc. 59, (1976) pp. 457-458.

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