公开(公告)号：DE69903595T2

公开(公告)日：2003-06-18

申请号：DE69903595

申请日：1999-06-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BOSE SUDHANGSU ,  GUPTA DINESH K ,  MARCIN JEANINE T ,  ULION NICHOLAS E

IPC: F01D5/28 ,  C23C4/00 ,  C23C4/08 ,  C23C28/00 ,  F01D5/18 ,  F02C7/00 ,  C23C4/02

Abstract: A thermal barrier coating system for a superalloy substrate is disclosed. The superalloy is preferably of the type that is capable of forming an adherent alumina layer. A bond coat is applied to a local area of the substrate (24), so that a portion of the substrate remains exposed. The localized area is defined to be the area(s) at which a TBC typically fails first, e.g., the leading (30) and trailing edges (32) of an airfoil (20), or other area. An alumina layer (26) is formed on the remaining portion of the substrate, and also on the bond coat. A ceramic layer (28) is then applied on the alumina layer. Even if the ceramic material is removed, the localized bond coat remains, and reduces the rate at which the underlying substrate oxidizes. A coated article is also disclosed, as is a system that utilizes a conventional superalloy and aluminide coating with the localized bond coat.

公开(公告)号：SG75960A1

公开(公告)日：2000-10-24

申请号：SG1999002587

申请日：1999-05-26

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BOSE SUDHANGSHU ,  GUPTA DINESH K ,  MARCIN JEANINE T ,  ULION NICHOLAS E

IPC: F01D5/28 ,  C23C4/00 ,  C23C4/08 ,  C23C28/00 ,  F01D5/18 ,  F02C7/00

Abstract: A thermal barrier coating system for a superalloy substrate is disclosed. The superalloy is preferably of the type that is capable of forming an adherent alumina layer. A bond coat is applied to a local area of the substrate (24), so that a portion of the substrate remains exposed. The localized area is defined to be the area(s) at which a TBC typically fails first, e.g., the leading (30) and trailing edges (32) of an airfoil (20), or other area. An alumina layer (26) is formed on the remaining portion of the substrate, and also on the bond coat. A ceramic layer (28) is then applied on the alumina layer. Even if the ceramic material is removed, the localized bond coat remains, and reduces the rate at which the underlying substrate oxidizes. A coated article is also disclosed, as is a system that utilizes a conventional superalloy and aluminide coating with the localized bond coat.

公开(公告)号：CA2252658A1

公开(公告)日：1999-05-26

申请号：CA2252658

申请日：1998-11-03

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DEMASI-MARCIN JEANINE T ,  LAGUEUX KEN ,  GUPTA DINESH K ,  FRELING MELVIN

IPC: F01D5/20 ,  F01D11/00 ,  F01D11/12 ,  F02C7/28 ,  F16J15/16 ,  F01D5/28 ,  F01D11/08 ,  F01D11/14 ,  C09K3/14 ,  C04B35/48

Abstract: A gas turbine engine seal system includes a rotating member having an abrasive tip disposed in rub relationship to a stationary, abradable seal surfac e. The abrasive tip comprises a zirconium oxide abrasive coat having a columnar structu re that is harder than the abradable seal surface such that the abrasive tip can cu t the abradable seal surface.

公开(公告)号：CA1304195C

公开(公告)日：1992-06-30

申请号：CA550803

申请日：1987-11-02

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MILANIAK MICHAEL S ,  OLSON WALTER E ,  GUPTA DINESH K

IPC: C23C10/52 ,  C23C10/50

Abstract: Yttrium Enriched Aluminide Coatings Methods are described for forming an yttrium enriched aluminide coating on the surface of a nickel or cobalt base superalloy article. In one preferred embodiment, a pack mixture for forming the coating consists essentially of, by weight percent, 5-35 of an Al-Y-Si alloy, 1-20 CoI2, balance Y2O3.

公开(公告)号：CA1185129A

公开(公告)日：1985-04-09

申请号：CA407393

申请日：1982-07-15

Applicant: UNITED TECHNOLOGIES CORP

Inventor： GUPTA DINESH K ,  DUVALL DAVID S

IPC: C22C19/00 ,  C22C19/05 ,  C23C4/06 ,  C23C4/08 ,  C23C14/14 ,  C23C30/00 ,  F01D25/00 ,  C23C5/00

Abstract: Improved coating compositions are described for the protection of superalloys at elevated temperatures. The coatings are of the MCrAlY type where M is nickel or cobalt and are significantly improved by the addition of from .1-7% silicon and .1-2% hafnium. Coatings of the invention are preferably applied by plasma spraying and as so applied are found to be substantially more effective than prior art coatings.

公开(公告)号：CA2252658C

公开(公告)日：2002-08-13

申请号：CA2252658

申请日：1998-11-03

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FRELING MELVIN ,  GUPTA DINESH K ,  DEMASI-MARCIN JEANINE T ,  LAGUEUX KEN

IPC: F01D5/20 ,  F01D11/00 ,  F01D11/12 ,  F02C7/28 ,  F16J15/16 ,  F01D5/28 ,  F01D11/08 ,  F01D11/14 ,  C09K3/14 ,  C04B35/48

Abstract: A gas turbine engine seal system includes a rotating member having an abrasive tip disposed in rub relationship to a stationary, abradable seal su rface. The abrasive tip comprises a zirconium oxide abrasive coat having a columnar str ucture that is harder than the abradable seal surface such that the abrasive tip ca n cut the abradable seal surface.

公开(公告)号：DE68921194T2

公开(公告)日：1995-06-14

申请号：DE68921194

申请日：1989-12-08

Applicant: UNITED TECHNOLOGIES CORP

Inventor： GUPTA DINESH K ,  OLSON WALTER E

IPC: C22C19/00 ,  C23C4/08 ,  C23C10/02 ,  C23C10/48 ,  C23C28/02

Abstract: A protective coating system for superalloys is described. The coating is an active element enriched aluminide, and can be formed by aluminizing an overlay coated superalloy, wherein during the aluminizing process, aluminum diffuses completely through the overlay coating and into the substrate. The coating system exhibits desirable oxidation resistance and resistance to thermal fatigue cracking, due to the presence of oxygen active elements in the overlay.

公开(公告)号：NZ241006A

公开(公告)日：1993-02-25

申请号：NZ24100689

申请日：1989-12-01

Applicant: UNITED TECHNOLOGIES CORP

Inventor： OLSON WALTER E ,  GUPTA DINESH K

IPC: C23C4/08 ,  C23C10/20 ,  C23F11/00

公开(公告)号：AU8728191A

公开(公告)日：1992-04-15

申请号：AU8728191

申请日：1991-09-19

Applicant: UNITED TECHNOLOGIES CORP

Inventor： GUPTA DINESH K

IPC: C23C28/00 ,  F01D5/28

公开(公告)号：ZA899398B

公开(公告)日：1990-09-26

申请号：ZA899398

申请日：1989-12-08

Applicant: UNITED TECHNOLOGIES CORP

Inventor： OLSON WALTER E ,  WALTER E OLSON ,  GUPTA DINESH K ,  DINESH K GUPTA

IPC: C22C19/00 ,  C23C4/08 ,  C23C10/02 ,  C23C10/48 ,  C23C28/02 ,  C23C ,  C23F ,  C25D ,  F01D

Abstract: A protective coating system for superalloys is described. The coating is an active element enriched aluminide, and can be formed by aluminizing an overlay coated superalloy, wherein during the aluminizing process, aluminum diffuses completely through the overlay coating and into the substrate. The coating system exhibits desirable oxidation resistance and resistance to thermal fatigue cracking, due to the presence of oxygen active elements in the overlay.