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. 22, 1987
Filed:
Jun. 02, 1986
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
A composite layer aluminum nitride-base sintered body has on at least one surface of AlN-base sintered body having a first layer and a second layer. The first layer is 100 parts by weight of at least one component selected from the group consisting of W, Mo, borides thereof and carbides thereof as a first component(s), and 0.1-50 parts by weight of AlN second component. The second layer has at least one component selected from the group consisting of W, Mo, borides thereof and carbides thereof. The thickness of said first layer is 0.5-40 .mu.m, and the sum of thickness of the first and second layers is 1-50 .mu.m. The AlN may also include sintering aids of oxides of rare earth metal and alkaline earth metals. Hydrides and oxides of Ti, Zr, Nb, V and Mn may be included in the first layer composition.