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:
Mar. 11, 2008
Filed:
Dec. 20, 2005
Andrew David Farmer, West Chester, OH (US);
Bangalore Aswatha Nagaraj, West Chester, OH (US);
Wenfeng LU, Mason, OH (US);
Ching-pang Lee, Cincinnati, OH (US);
Joseph Michael Guentert, Cincinnati, OH (US);
Andrew David Farmer, West Chester, OH (US);
Bangalore Aswatha Nagaraj, West Chester, OH (US);
Wenfeng Lu, Mason, OH (US);
Ching-Pang Lee, Cincinnati, OH (US);
Joseph Michael Guentert, Cincinnati, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A gas turbine engine nozzle segment and process for producing such a nozzle segment to exhibit improved durability and aerodynamic performance. The process produces a nozzle segment having at least one vane between and interconnecting a pair of platforms. The nozzle segment is cast from a gamma prime-strengthened nickel-base superalloy, on whose surface is thermal sprayed an environmental coating formed of a MCrAlX-type coating material. The surface of the environmental coating is then worked to cause the coating to have a surface finish of less than 2.0 micrometers Ra. Cooling holes are then drilled in the nozzle segment, after which an oxidation-resistant coating is applied on the smoothed surface of the nozzle segment so as to maintain an outermost surface on the nozzle segment having surface finish of less than 2.0 micrometers Ra.