High-strength and temperature-change resistant ceramic formed bo

Details High-strength and temperature-change resistant ceramic formed bo High-strength and temperature-change resistant ceramic formed bo

1980-05-19

1983-12-20

Poer, James

Compositions: ceramic

Ceramic compositions

Refractory

501104, 501105, 501152, C04B 3548, C04B 3550

Patent

active

044218613

ABSTRACT:
A ceramic formed body having high temperature change resistance and stren and being composed of a ceramic matrix with dispersed particles of ZrO.sub.2, HfO.sub.2, or mixture thereof, is formed of a powdered ceramic material which is a precursor to the matrix material of the ceramic matrix, mixed with a compound which can form ZrO.sub.2, HfO.sub.2 or mixture thereof upon reaction with the ceramic material, and thereafter densely sintered below the reaction temperature. The sintered body is then heat treated above the reaction temperature to convert the precursor ceramic material into the matrix material and form the ceramic body with in situ formation of the dispersed particles.

REFERENCES:
patent: 2842447 (1958-07-01), Schlotzhauer et al.
patent: 3247000 (1966-04-01), Taylor
patent: 3249449 (1966-05-01), Kiehl et al.
patent: 3303032 (1967-02-01), Holt et al.
patent: 4322249 (1982-03-01), Claussen et al.

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