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. 27, 2011
Filed:
May. 14, 2009
Mark Daniel Gorman, West Chester, OH (US);
Brian Thomas Hazel, West Chester, OH (US);
Brett Allen Rohrer Boutwell, Liberty Township, OH (US);
Ramgopal Darolia, West Chester, OH (US);
Mark Daniel Gorman, West Chester, OH (US);
Brian Thomas Hazel, West Chester, OH (US);
Brett Allen Rohrer Boutwell, Liberty Township, OH (US);
Ramgopal Darolia, West Chester, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A coating process for an article having a substrate formed of a metal alloy that is prone to the formation of a secondary reaction zone (SRZ). The coating process forms a coating system that includes an aluminum-containing overlay coating and a stabilizing layer between the overlay coating and the substrate. The overlay coating contains aluminum in an amount greater by atomic percent than the metal alloy of the substrate, such that there is a tendency for aluminum to diffuse from the overlay coating into the substrate. The stabilizing layer is predominantly or entirely formed of at least one platinum group metal (PGM), namely, platinum, rhodium, iridium, and/or palladium. The stabilizing layer is sufficient to inhibit diffusion of aluminum from the overlay coating into the substrate so that the substrate remains essentially free of an SRZ that would be deleterious to the mechanical properties of the alloy.