William Edward Connor

US Patent:

56837615, Nov 4, 1997

Filed:

May 25, 1995

Appl. No.:

8/450647

Inventors:

Robert W. Bruce - Loveland OH
Mark A. Rosenzweig - Hamilton OH
Bangalore A. Nagaraj - West Chester OH
Jon C. Schaeffer - Milford OH
William B. Connor - Clifton Park NY
David J. Wortman - Hamilton OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

C23C 1640

US Classification:

427596

Abstract:

A bond-coated substrate is protected with an alpha alumina layer. The alpha alumina layer may be deposited as a relatively thick layer directly onto the bond-coated substrate. In this embodiment, no further ceramic layer overlies the alpha alumina layer. Other ceramics may be mixed into the alpha alumina layer, however. In another embodiment, a layer of a ceramic other than alpha alumina is deposited over the bond-coated substrate, and an alpha alumina layer is deposited over the ceramic layer.

US Patent:

61239976, Sep 26, 2000

Filed:

Oct 15, 1997

Appl. No.:

8/950665

Inventors:

Jon C. Schaeffer - Milford OH
William B. Connor - Mason OH
Robert D. Field - Los Alamos NM

Assignee:

General Electric Company - Cincinnati OH

International Classification:

B05D 302
C23C 1400

US Classification:

4273837

Abstract:

A thermal barrier coating system and a method for forming the coating system which yields a thermal barrier coating having good adhesion to a bond coat overlying a metal superalloy substrate. The adhesion of the bond coat and the thermal barrier coating is enhanced by forming a mature. alpha. -alumina (Al. sub. 2 O. sub. 3) scale at the bond coat-TBC interface. The desired mature. alpha. -alumina scale can be obtained by utilizing one or more of the following steps: preoxidation of the bond coat at certain minimum temperatures and durations; inoculation of the surface of the bond coat; surface doping or alloying of the bond coat surface; and the addition of noble metals to the bond coat. Each of these steps promotes the formation of. alpha. -alumina and avoids the formation of the. gamma. ,. delta. and. theta.

US Patent:

57801100, Jul 14, 1998

Filed:

Mar 18, 1997

Appl. No.:

8/819344

Inventors:

Jon C. Schaeffer - Milford OH
William B. Connor - Clifton Park NY
Robert D. Field - Los Alamos NM

Assignee:

General Electric Company - Cincinnati OH

International Classification:

B05D 300
C23C 1400

US Classification:

427327

Abstract:

A method for manufacturing an article for use in a gas tubine engine is disclosed, which comprises applying a metallic bond coating on a superalloy substrate; surface doping a surface of the bond coating with at least one element selected from the group consisting of Fe, Cr and Y by plating, ion implantation, MOCVD and sputttering; and then applying an insulative ceramic coating on the bond coating.

US Patent:

55387969, Jul 23, 1996

Filed:

Oct 13, 1992

Appl. No.:

7/960494

Inventors:

Jon C. Schaffer - Milford OH
Wendy H. Murphy - Cincinnati OH
William B. Connor - Cincinnati OH
Bangalore A. Nagaraj - West Chester OH
Himanshu B. Vakil - Schenectady NY

Assignee:

General Electric Company - Cincinnati OH

International Classification:

B32B 1504

US Classification:

428469

Abstract:

A coated article is prepared by melting and casting an article substrate formed of a nickel-base superalloy. The article substrate is heated in a hydrogen-containing atmosphere at a temperature of at least 2000. degree. F. for a period sufficient to desulfurize the substrate to a sulfur content of less than about 1 part per million. Optionally, an aluminum-oxide environmental coating is provided overlying the substrate. A ceramic thermal barrier coating is applied overlying the substrate. Significantly, there being no bond coat applied to the substrate prior to the application of the thermal barrier coating.