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:
Dec. 19, 2006
Filed:
Dec. 13, 2002
Irene Spitsberg, Loveland, OH (US);
Joseph David Rigney, Milford, OH (US);
Ramgopal Darolia, West Chester, OH (US);
Elissa Hae-kyung Lee, Cincinnati, OH (US);
Jeffrey Allan Pfaendtner, Blue Ash, OH (US);
Irene Spitsberg, Loveland, OH (US);
Joseph David Rigney, Milford, OH (US);
Ramgopal Darolia, West Chester, OH (US);
Elissa Hae-Kyung Lee, Cincinnati, OH (US);
Jeffrey Allan Pfaendtner, Blue Ash, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A beta-phase nickel aluminide (NiAl) overlay coating () and method for modifying the grain structure of the coating () to improve its oxidation resistance. The coating () is deposited by a method that produces a grain structure characterized by grain boundaries () exposed at the outer coating surface (). The grain boundaries () may also contain precipitates () as a result of the alloyed chemistry of the coating (). During or after deposition, the overlay coating () is caused to form new grain boundaries () that, though open to the outer surface () of the coating (), are free of precipitates or contain fewer precipitates () than the as-deposited grain boundaries (). New grain boundaries () are preferably produced by causing the overlay coating () to recrystallize during coating deposition or after deposition as a result of a surface treatment followed by heat treatment.