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:
Feb. 27, 1979
Filed:
Aug. 24, 1977
Norman S Bornstein, West Hartford, CT (US);
Michael A DeCrescente, Wethersfield, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A method for coating a nickel-base superalloy substrate with a nickel-aluminide coating, saturated with chromium and containing no precipitated phases is disclosed which comprises enriching the superalloy substrate with chromium by diffusion of chromium into the substrate at a rate below that at which a pure or alloyed chromium layer forms and then growing a nickel aluminide coating on the chromium enriched substrate surface by the outward diffusion of nickel from the substrate into an aluminum-containing pack in which the source of aluminum is the stoichiometric intermetallic compound NiAl, or a metal powder mixture having the overall aluminum activity of NiAl.