Aluminum oxide-based sintered object and process for producing t

Details Aluminum oxide-based sintered object and process for producing t Aluminum oxide-based sintered object and process for producing t

1993-02-10

1994-02-15

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 91, 501 92, 501128, 51309, C04B 3558

Patent

active

052866840

ABSTRACT:
An aluminum oxide-based sintered object having excellent abrasion resistance includes .alpha.-aluminum oxide, a silicon compound and a tungsten compound, wherein the silicon compound and the tungsten compound are present in amounts based on starting amounts of SiC and W metal of from 5 to 40 mole % and from 0.5 to 25 mole %, respectively, based on the sintered object overall, with a W/SiC molar ratio of 4 or less, and in which particles of at least one of tungsten carbide and tungsten silicide having an average particle diameter of 0.5 .mu.m or less are dispersed as a crystalline phase.

REFERENCES:
patent: 4069060 (1978-01-01), Hayashi et al.
patent: 4889834 (1989-12-01), Niihara et al.
patent: 5011799 (1991-04-01), Das Chaklander et al.
patent: 5194073 (1993-03-01), Winter et al.

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