Wear-resistant member

Details Wear-resistant member Wear-resistant member

1990-07-26

1992-03-24

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 98, C04B 3558

Patent

active

050988727

ABSTRACT:
A wear-resistant member consisting of ceramics containing yttrium oxide and aluminum oxide as a sintering auxiliary component and further titanium oxide, hafnium oxide and aluminum nitride, and mainly formed of silicon nitride. Silicon nitride ceramics possesses the segregation of amorphous phase mainly consisting of the sintering auxiliary component, but its size is 100 .mu.m or below at most. By restricting the segregation size of the amorphous phase to 100 .mu.m or below, sliding property, particularly rolling fatigue properties are improved. And also variability is lowered and the reliability can be highly improved.

REFERENCES:
patent: 4407970 (1983-10-01), Komatsu et al.
patent: 4407971 (1983-10-01), Komatsu et al.
patent: 4720201 (1988-01-01), Nakamura et al.
patent: 4820665 (1989-04-01), Ukai et al.
patent: 4879263 (1989-11-01), Komeya et al.
Technical Review No. 54 (1988), p. 34, of NTN Toyo Bearing Co.

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