George W Goward

US Patent:

42489407, Feb 3, 1981

Filed:

Jun 30, 1977

Appl. No.:

5/811807

Inventors:

George W. Goward - North Haven CT
Delton A. Grey - Vernon CT
Richard C. Krutenat - Richland WA

Assignee:

United Technologies Corporation - East Hartford CT

International Classification:

B32B 1504

US Classification:

428633

Abstract:

Adherent, thermal shock-resistant protective coatings for nickel base super alloys are obtained by applying to the base metal a thin bond coat of an alloy of chromium aluminum and yttrium with materials selected from the group consisting of iron, cobalt, nickel and nickel-cobalt and applying thereover a continuously graded mixture of this material with a zirconia-based ceramic, the concentration of zirconia-based ceramic increasing from the bond coat to the outer layer. The zirconia ceramic may be stabilized by the addition thereto of amounts of magnesium oxide or other materials.

US Patent:

RE338761, Apr 7, 1992

Filed:

Oct 10, 1989

Appl. No.:

7/419358

Inventors:

George W. Goward - Clinton CT
Delton A. Grey - Scotia NY
Richard C. Krutenat - Lowell MA

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

B32B 1504

US Classification:

428633

Abstract:

Adherent, thermal shock-resistant protective coatings for nickel base super alloys are obtained by applying to the base metal a thin bond coat of an alloy of chromium aluminum and yttrium with materials selected from the group consisting of iron, cobalt, nickel and nickel-cobalt and applying thereover a continuously graded mixture of this material with a zirconia-based ceramic, the concentration of zirconia-based ceramic increasing from the bond coat to the outer layer. The zirconia ceramic may be stabilized by the addition thereto of amounts of magnesium oxide or other materials.

US Patent:

48373893, Jun 6, 1989

Filed:

Jun 4, 1984

Appl. No.:

6/617112

Inventors:

Srinivasan Shankar - Branford CT
George W. Goward - New Haven CT

Assignee:

Turbine Components Corporation - Branford CT

International Classification:

B32B 1500

US Classification:

428668

Abstract:

A dimensional composition, a dimensionally restored alloy structure and a method of dimensionally restoring gas turbine and the like components that will be subsequently coated which includes low-pressure plasma spraying onto a damaged vane or other components, an alloy composition consisting essentially by weight of 1 to 4% aluminum, 0 to 1. 5% hafnium and 0 to 20% nickel in the base composition of the cobalt alloy component, grinding to final dimension and diffusion coating. Tantalum is substituted for columbium where the base composition of the alloy contains columbium.