Liang Jiang

US Patent:

6916529, Jul 12, 2005

Filed:

Jan 9, 2003

Appl. No.:

10/338671

Inventors:

Surinder Singh Pabla - Greer SC, US
Farshad Ghasripoor - Scotia NY, US
Liang Jiang - Guilderland NY, US
Canan Uslu Hardwicke - Niskayuna NY, US
William Emerson Martinez Zegarra - Paucarpata, PE

Assignee:

General Electric Company - Schnectady NY

International Classification:

B32B015/04
B32B003/26
F03B003/12

US Classification:

428325, 428335, 4283122, 4283133, 4283126, 4283128, 4283144, 4283148, 4283184, 428680, 428655, 428650, 416241 R

Abstract:

An abradable coating composition for use on shrouds in gas turbine engines or other hot gas path metal components exposed to high temperatures containing an initial porous coating phase created by adding an amount of inorganic microspheres, preferably alumina-ceramic microballoons, to a base metal alloy containing high Al, Cr or Ti such as β-NiAl or, alternatively, MCrAlY that serves to increase the brittle nature of the metal matrix, thereby increasing the abradability and oxidation resistance of the coating at elevated temperatures. Coatings having a total open and closed porosity of between 20% and 55% by volume due to the presence of ceramic microballoons ranging in size from about 10 microns to about 200 microns have been found to exhibit excellent abradability for applications involving turbine shroud coatings. An abradable coating thickness in the range of between 40 and 60 ml provides improved performance for turbine shrouds exposed to gas temperatures between 1380 F. and 1800 F.

US Patent:

7156280, Jan 2, 2007

Filed:

Dec 15, 2005

Appl. No.:

11/300394

Inventors:

Liang Jiang - Schenectady NY, US
Laurent Cretegny - Niskayuna NY, US
Warren M. Miglietti - Greenville SC, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B23K 35/14
C22F 1/10
B32B 15/00

US Classification:

228 563, 148562, 428668

Abstract:

A nickel-based high-temperature braze alloy composition includes Cr, Hf, and B. Furthermore, a cobalt-based high-temperature braze alloy composition includes Cr, Hf, and B. The braze alloys can be used, for example, as a single homogenous braze. The braze alloys can also be used, for example, as a component in a wide gap braze mixture where higher or lower melting point superalloy and/or brazing powder is used. The braze alloys may permit joining/repairing of superalloy articles with complex shape and may be used in high temperature applications.

US Patent:

7300708, Nov 27, 2007

Filed:

Mar 16, 2004

Appl. No.:

10/801843

Inventors:

Michael Francis Xavier Gigliotti, Jr. - Scotia NY, US
Canan Uslu Hardwicke - Niskayuna NY, US
Liang Jiang - Guilderland NY, US
John William Short - Niskayuna NY, US
Don Mark Lipkin - Nishayuna NY, US
Jonathan Paul Blank - Mason OH, US
Krishnamurthy Anand - Bangalore, IN

Assignee:

General Electric Company - Niskayuna NY

International Classification:

B32B 15/04
B32B 18/00

US Classification:

428632, 420902, 428615, 428680, 428660, 416241 B

Abstract:

An erosion resistant protective structure for a turbine engine component comprises a shape memory alloy. The shape memory alloy includes nickel-titanium based alloys, indium-titanium based alloys, nickel-aluminum based alloys, nickel-gallium based alloys, copper based alloys, gold-cadmium based alloys, iron-platinum based alloys, iron-palladium based alloys, silver-cadmium based alloys, indium-cadmium based alloys, manganese-copper based alloys, ruthenium-niobium based alloys, ruthenium-tantalum based alloys, titanium based alloys, iron-based alloys, or combinations comprising at least one of the foregoing alloys. Also, disclosed herein are methods for forming the shape memory alloy onto turbine component.

US Patent:

7416790, Aug 26, 2008

Filed:

Dec 8, 2006

Appl. No.:

11/608310

Inventors:

Liang Jiang - Schenectady NY, US
Michael Francis Xavier Gigliotti, Jr. - Scotia NY, US
Mark Daniel Gorman - West Chester OH, US
Ramgopal Darolia - West Chester OH, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B32B 15/01
B32B 15/04
B32B 15/20

US Classification:

428668, 428650, 428652, 428670, 428680

Abstract:

A coating process and system suitable for use on components subjected to high temperatures. The coating system includes an overlay coating of predominantly B2 phase rhodium aluminide (RhAl) intermetallic compound containing about 25 to about 90 atomic percent rhodium, about 10 to about 60 atomic percent aluminum, optionally up to a combined total of about 25 atomic percent of one or more platinum group metals chosen from the group consisting of platinum, palladium, ruthenium, and iridium, and up to about 20 atomic percent of the base metal and alloying constituents of the substrate. The RhAl intermetallic coating may serve as an environmental coating, a diffusion barrier layer for an overlying environmental coating, or both, with or without an outer ceramic coating.

US Patent:

7494619, Feb 24, 2009

Filed:

Dec 23, 2003

Appl. No.:

10/747712

Inventors:

Melvin Robert Jackson - Niskayuna NY, US
Liang Jiang - Guilderland NY, US
Ji-Cheng Zhao - Latham NY, US
Canan Uslu Hardwicke - Niskayuna NY, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

C22C 5/04

US Classification:

420462

Abstract:

An alloy, an article comprising the alloy, and methods for manufacturing and repairing an article that employ the alloy are presented. The alloy comprises, in atom percent, at least about 50% rhodium, up to about 49% of a first material, from about 1% to about 15% of a second material, and up to about 10% of a third material. The first material comprises at least one of palladium, platinum, iridium, and combinations thereof. The second material comprises at least one of tungsten, rhenium, and combinations thereof. The third material comprises at least one of ruthenium, chromium, and combinations thereof. The alloy comprises an A1-structured phase at temperatures greater than about 1000 C. , in an amount of at least about 90% by volume.

US Patent:

7527877, May 5, 2009

Filed:

Oct 27, 2006

Appl. No.:

11/553515

Inventors:

Mark D. Gorman - West Chester OH, US
Michael F. Gigliotti - Scotia NY, US
Liang Jiang - Schenectady NY, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F03B 3/12
B32B 15/00
B32B 15/01

US Classification:

428670, 416229 R, 416241 R, 428678, 428680, 428681, 428685, 428632, 428633, 428215, 428220, 428332, 428335, 428336, 428700

Abstract:

A modified platinum group metal coating composition comprising a phase having a solid solution face-centered cubic (fcc) crystal structure, rich in platinum group materials. In order to be effective, the platinum group metal coating material was modified based on the chemical composition and chemical activity of the substrate material. The platinum group metal coating material was modified to include, in solid solution, elements of the superalloy substrate, specifically nickel (Ni) and cobalt (Co). Depending on the substrate material, the modified platinum group metal coating material may not even include Ni or Co, but may be modified to include amounts of different elements that are consistent with the chemical composition of the substrate. The modified platinum metal coating material also includes aluminum (Al). The composition may include small amounts of a second phase isolated within the fcc phase matrix.

US Patent:

7575418, Aug 18, 2009

Filed:

Sep 30, 2004

Appl. No.:

10/955056

Inventors:

Michael Francis Xavier Gigliotti - New York NY, US
Canan Uslu Hardwicke - Niskayuna NY, US
Liang Jiang - Schenectady NY, US
Don Mark Lipkin - Niskayuna NY, US
Samuel Vinod Thamboo - Latham NY, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

F03B 15/20
F03B 15/04
C25D 5/28
B32D 15/00
B32D 15/01

US Classification:

416241R, 428660, 428636, 428680, 428937, 428938, 428939, 428940

Abstract:

Disclosed herein is a turbine component comprising a substrate; and a protective structure formed on the substrate, wherein the protective structure comprises an α-β titanium alloy, a β-titanium alloy or a near-β titanium alloy. Disclosed herein too is a process for providing a protective structure to a turbine component, comprising affixing a protective structure on a turbine component; wherein the protective structure comprises an α-β titanium alloy, a near-β titanium alloy or a β-titanium alloy.

US Patent:

7651023, Jan 26, 2010

Filed:

May 22, 2007

Appl. No.:

11/751944

Inventors:

Shyh-Chin Huang - Latham NY, US
Liang Jiang - Guilderland NY, US
Melvin Robert Jackson - Corea ME, US
Laurent Cretegny - Niakayuna NY, US
Charles Gitahi Mukira - Fairfax VA, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

B23K 31/02

US Classification:

228245, 228246, 2282481, 428544

Abstract:

A nickel-based braze composition is described, containing nickel, palladium, and restricted amounts of boron and silicon. The composition can also contain tantalum, titanium, and zirconium, as well as aluminum, chromium, and cobalt. A method for joining two metal components, using the braze composition, is also described. The braze composition can also be used to fill cracks or other cavities in a component, e. g. , a gas turbine part formed from a nickel-based superalloy. Articles of manufacture which contain the braze composition are also described.