The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 1992
Filed:
Jul. 26, 1990
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501 97 ; 501 98 ;
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.