Sintered microcrystalline ceramic material

Details Sintered microcrystalline ceramic material Sintered microcrystalline ceramic material

1989-10-25

1991-10-01

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Yttrium, lanthanide, actinide, or transactinide containing

51309, 501 95, 501153, C04B 3550

Patent

active

050533690

ABSTRACT:
Sintered microcrystalline ceramic material based on .alpha.-Al.sub.2 O.sub.3 with an addition of 0.01 to 2.0 weight percent of a cerium compound, consisting of a microcrystalline matrix and 0.1 to 30 volume percent whisker-like needles, whereby said cerium compound is mainly present in the needles. The whisker-like needles give this material a special tenacity combined with good abrasive results.

REFERENCES:
patent: 3802893 (1974-04-01), Kiger et al.
patent: 4181532 (1980-01-01), Woodhead
patent: 4449989 (1984-05-01), Sarin et al.
patent: 4457767 (1984-07-01), Poon et al.
patent: 4598053 (1986-07-01), Yamakawa et al.
patent: 4702970 (1987-10-01), Sarin et al.
patent: 4744802 (1988-05-01), Schwabel
patent: 4852999 (1989-08-01), Mehrotra et al.

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