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:
Jul. 02, 1985
Filed:
Jan. 13, 1984
Applicant:
Inventors:
Yoshihiro Yamamoto, Aichi, JP;
Kenji Sakurai, Aichi, JP;
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ; C04B / ;
U.S. Cl.
CPC ...
501 87 ; 51309 ; 501 96 ; 501 98 ; 264 65 ;
Abstract
Ceramic materials for cutting tools are described, comprising molding a powder mixture comprising (a) Al.sub.2 O.sub.3, (b) TiN, and (c) at least one of ZrC, Zr, and ZrN, wherein component (a) constitutes between 25 and 80% of the total volume of the powder mixture and the volume ratio of component (c) to component (b) is 1/2 or less, and sintering the molded powder in vacuum or in an inert atmosphere. A process for production thereof is also described.