Sintered molding, a method for producing it and its use

Details Sintered molding, a method for producing it and its use Sintered molding, a method for producing it and its use

1987-02-26

1990-12-04

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501103, 501105, 501120, 501152, C04B 3548

Patent

active

049753975

ABSTRACT:
The present invention is in a sintered molding of partially stabilized zirconium oxide having a microstructure of 40 to 70 volume percent cubic phase, 30 to 70 volume percent tetragonal phase, and up to 10 volume percent monoclinic phase wherein the tetragonal phase is present in the form of precipitates less than 200 nm. A mixture of magnesia and yttria is used to stabilize the zirconia. Optionally, the sintered molding may further contain up to 20 wt. % spinel.

REFERENCES:
patent: 4067745 (1978-01-01), Garvie et al.
patent: 4279655 (1981-07-01), Garvie et al.
patent: 4344904 (1982-08-01), Yamada
patent: 4360598 (1982-11-01), Otagiri et al.
patent: 4520114 (1985-05-01), David
patent: 4544607 (1985-10-01), Nagoya et al.
patent: 4565792 (1986-01-01), Knapp
patent: 4587225 (1986-05-01), Tsukuma et al.
patent: 4659680 (1987-04-01), Guile
"Mechanisms of Toughening Partially Stabilized Zirconia (PSZ)" by D. L. Porter and A. H. Heuer, Journal of The American Ceramic Society-Discussions and Notes, Mar.-Apr. 1977, vol. 60, pp. 183-184.

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