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. 03, 1992
Filed:
Nov. 21, 1989
Applicant:
Inventors:
Yoshinari Miyamoto, Midoridai, Kawanishi-shi, Hyogo, JP;
Mitsue Koizumi, Toyonaka-shi, Osaka, JP;
Hiroyuki Takemura, Toyama, JP;
Assignees:
Yoshida Kogyo K.K., all of, JP;
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
264 62 ; 264 65 ; 501 92 ;
Abstract
A high strength Si.sub.3 N.sub.4 composite composed of a sintered body consisting mainly of Si.sub.3 N.sub.4 in which SiC whiskers with a small aspect ratio, preferably an average aspect ratio of 15 to 100, is contained in the sintered body and thereby a considerable improvements can be obtained in the mechanical properties, such as strength, toughness and mechanical shock resistance. The composite is produced by mixing the SiC whiskers with Si.sub.3 N.sub.4 powder and then sintering the resulting mixture by a hot isostatic pressing without using a sintering aid.