Christine G Walston

US Patent:

7919187, Apr 5, 2011

Filed:

Dec 27, 2006

Appl. No.:

11/616361

Inventors:

Brian Thomas Hazel - West Chester OH, US
Christine Walston - Cincinnati OH, US
Irene Spitsberg - Pittsburgh PA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B32B 13/04
B05D 3/02

US Classification:

428446, 428448, 428701, 4273722, 416241 R, 416241 B

Abstract:

A protective coating for use on a silicon-containing substrate, and deposition methods therefor. The coating has a strontium-aluminosilicate (SAS) composition that is less susceptible to degradation by volatilization and in corrosive environments as a result of having at least an outer surface region that consists essentially of one or more stoichiometric crystalline phases of SAS and is substantially free of a nonstoichiometric second crystalline phase of SAS that contains a substoichiometric amount of silica. The coating can be produced by carrying out deposition and heat treatment steps that result in the entire coating or just the outer surface region of the coating consisting essentially of the stoichiometric celsian phase.

US Patent:

20070267109, Nov 22, 2007

Filed:

May 17, 2006

Appl. No.:

11/383783

Inventors:

Thomas J. Kelly - Cincinnati OH, US
Warren D. Grossklaus - West Chester OH, US
Brent R. Tholke - Cincinnati OH, US
Christine Govern Walston - Cincinnati OH, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

C22C 19/05
C22F 1/10

US Classification:

148516, 148675, 266258, 148410

Abstract:

A fixture and method for repairing superalloy articles. The fixture ideally holds the article in place if repairs are made. An interface between the fixture and the article facilitate transfer of heat between the article and the fixture so that the article can be differentially heat treated. A portion of the article extends from the fixture. This portion of the article, which may be repaired within the fixture or may be repaired elsewhere, is solution heat treated while in the fixture so that the area extending from the fixture is solutioned, while heat is transferred from the article through the fixture, thereby preventing the temperature of the portion of the article within the fixture from being elevated so as to modify its microstructure. The solutioned portion can then be heat treated, while in the fixture, to precipitation harden it as desired.

US Patent:

20090314393, Dec 24, 2009

Filed:

Aug 24, 2009

Appl. No.:

12/546378

Inventors:

Thomas J. Kelly - Cincinnati OH, US
Brent R. Tholke - Cincinnati OH, US
Christine Govern Walston - Cincinnati OH, US

Assignee:

GENERAL ELECTRIC COMPANY - Schenectady NY

International Classification:

C21D 1/10
C21D 9/00
C22F 1/10

US Classification:

148574, 148559, 148675

Abstract:

Provided is a method for heat treating a precipitation-hardened article having a thick section and a thin section so that the thin section can be solution annealed while the metallurgical structure of the thick section is substantially unaffected by the solution-annealing process. The method restores the microstructure of the thin section uniformly by solution annealing the thin section to achieve a preselected microstructure but without affecting the microstructure of the thick section.