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:
Sep. 21, 1993
Filed:
Nov. 20, 1992
Applicant:
Inventors:
John Robertson, Stafford, GB;
Kassim Juma, Stafford, GB;
Assignee:
Foesco International Limited, Birmingham, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501 95 ; 501 97 ;
Abstract
An improved ceramic composite material is provided based on zirconia and boron nitride that can be satisfactorily bonded without sintering. The material comprises a particulate mixture of boron nitride, stabilized zirconia and silicon nitride bonded together by whiskers of silicon nitride. The silicon nitride whiskers may conveniently be formed in-situ by heating the mixture of particulate boron nitride, stabilized zirconia and silicon nitride together with powdered metallic silicon in an atmosphere of nitrogen.