Transformation toughened zirconia-titania-yttria ceramic alloys

Details Transformation toughened zirconia-titania-yttria ceramic alloys Transformation toughened zirconia-titania-yttria ceramic alloys

1986-11-24

1988-06-28

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 88, 501 96, 501 97, 501 98, 501103, 501106, 501127, 501128, C04B 3548, C04B 3550, C04B 3580

Patent

active

047539020

ABSTRACT:
This invention is directed to the production of ceramic alloys consisting essentially of ZrO.sub.2, titania, and yttria or rare earth oxides such as gadolinia, ytterbia, neodymia, and ceria. Mole % concentration values as low as 0.25 mole % for yttria have been found to provide a hard and tough ceramic alloy in the presence of the titania-zirconia body. These compositions have been found to produce effective hard and tough ceramic bodies when mixed with refractory fibers and/or whiskers and hard refractory ceramics.

REFERENCES:
patent: 4543345 (1985-09-01), Wei
patent: 4598053 (1986-07-01), Yamakawa et al.
patent: 4645716 (1987-02-01), Harrington et al.

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