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:
Jan. 20, 1981
Filed:
Sep. 11, 1979
Norman S Bornstein, West Hartford, CT (US);
Francis J Wallace, Windsor, CT (US);
Michael A De Crescente, Wethersfield, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
An article with an improved MCrAlY coating is disclosed wherein a plasma sprayed MCrAlY coating is provided with a metallic envelope and then hot isostatically pressed to densify the coating and interdiffuse the envelope. Thus, the substrate is provided with a coating which in its bulk is the densified plasma coating with an outer surface zone which is enriched in a metal which enhances the oxidation-corrosion protective properties of the coating. Preferred coatings have a standard CoCrAlY bulk with a metal-enriched surface zone of about 0.02 mm depth. When aluminum is added the surface zone is comprised by weight percent of about 60 Co, 20 Cr and 22 Al. With chromium the surface zone is about 50 Co, 43 Cr and 8.5 Al.