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. 25, 1994
Filed:
Nov. 27, 1989
Lee E Rumaner, Schenectady, NY (US);
Dennis M Gray, Delanson, NY (US);
Richard L Mehan, Scotia, NY (US);
John R Rairden, III, Schenectady, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
An improved thermal barrier coating is disclosed. The coating is formed on a metal part to be exposed to high temperature gases. The metal part is first coated with an adherent sublayer of MCrAlY alloy. In this case, the M of the MCrAlY is nickel, cobalt, iron, or some combination of these metals. A diffused layer of MCrAlY combined with a low concentration of mullite is formed over the MCrAlY subcoating and the mullite is increased in concentration as the thickness of the layer increases. The outer surface of the layer is all mullite. Improved life expectancy and decreased thermal conductivity is achieved.