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:
Apr. 16, 2013
Filed:
Apr. 19, 2012
Wenping Jiang, Fayetteville, AR (US);
Mike Kimmel, Rogers, AR (US);
Ajay P. Malshe, Springdale, AR (US);
Brett Mcafee, Fayetteville, AR (US);
Wenping Jiang, Fayetteville, AR (US);
Mike Kimmel, Rogers, AR (US);
Ajay P. Malshe, Springdale, AR (US);
Brett McAfee, Fayetteville, AR (US);
Other;
Abstract
An adherent coating for carbide and ceramic substrates employs a thin layer of hafnium nitride (HfN) between the substrate and a subsequent layer or layers. The thin layer may be employed without thermal cracking due to heat during use, such as for the insert of a cutting tool, because the upper layer or layers provide a gradual transition of material properties to a harder, less thermally conductive material on the outermost layer. A particular arrangement of layers on the carbide or ceramic substrate and hafnium nitride layer may be, from innermost to outermost layer, titanium carbide, aluminum oxide, and titanium nitride.