Aluminum oxide ceramics having improved mechanical properties

Details Aluminum oxide ceramics having improved mechanical properties Aluminum oxide ceramics having improved mechanical properties

1989-07-27

1991-10-01

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Aluminum compound containing

501 6, 501 5, C04B 3510, C04B 3518, C04B 3544

Patent

active

050533703

ABSTRACT:
A wear-resistant alumina material is disclosed, as is its preparation by liquid phase sintering a mixture of about 70 to 95 percent by weight of crystalline Al.sub.2 O.sub.3 particles and about 30 to 5 percent by weight of glass phase-forming components in a nitrogenizing atmosphere from which oxygen is substantially excluded. Generally, the resulting material has a 5 Kg Vickers hardness which is at least about 5 percent greater than the hardness of a corresponding alumina material sintered in air.

REFERENCES:
patent: 3615763 (1971-10-01), Flock
patent: 4895814 (1990-01-01), Kanzaki

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