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:
Oct. 08, 2019
Filed:
Sep. 30, 2015
Sumitomo Electric Hardmetal Corp., Itami-shi, JP;
Anongsack Paseuth, Sorachi-gun, JP;
Takanori Detani, Sorachi-gun, JP;
Sumitomo Electric Hardmetal Corp., Itami-shi, JP;
Abstract
A hard coating includes two first crystalline phases, and a second crystalline phase containing AlN of a wurtzite-type crystal structure disposed therebetween. The two first crystalline phases each include, independently, a laminate structure having a TiAlN phase having a sodium chloride-type crystal structure, and an AlTiN phase having a sodium chloride-type crystal structure that are alternately stacked. An Al composition ratio x1 satisfies a relationship 0.5≤x1≤0.75, and an Al composition ratio x2 satisfies a relationship 0.75<x2≤0.95. The laminate structure includes a region in which an Al concentration periodically changes along a stacking direction of the TiAlN phase and the AlTiN phase. In this region, a difference between a maximum value of the Al composition ratio x2 and a minimum value of the Al composition ratio x1 is greater than 0.25.