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:
Aug. 06, 1996
Filed:
Feb. 13, 1995
Applicant:
Inventors:
Nobuo Tsuno, Kasugai, JP;
Tomoyuki Fujii, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
428623 ; 428629 ; 428633 ; 428654 ; 428471 ;
Abstract
A multi-layer metal-ceramic material including an alumina layer and a metallic layer including an Mg-containing alloy. The alumina layer and metallic layer are bonded together via a reaction layer including MgAl.sub.2 O.sub.4 spinel. The alumina and metallic layers are pressed together and heated to a temperature below the solidus of the Mg-containing alloy, whereby the Mg migrates through the metallic layer to the interface and reacts with the alumina layer to form the spinel reaction layer. The bonded interface is excellent in resistance to Na attack.