Patent US3316656A successfully refreshed from Google Patents.
Patent US5015502A successfully refreshed from Google Patents.
US5015502A
Expired / Lapsed
US
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Ceramic thermal barrier coating with alumina interlayer
Assignee: Honeywell International Inc
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Filing: 1989-11-08
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Granted: 1991-05-14
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Expires: 2009-11-08
Abstract
Abstract A ceramic thermal barrier coating system for superalloy components subjected to high operating temperatures, such as gas turbine engine airfoils, includes a high purity alumina interfacial layer between the metallic substrate and the ceramic overcoat in order to better resist failure by spalling.
Inventors
- 👤 Thomas E. Strangman
- 👤 Patricia A. Solfest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:53
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; C23C14/08; C23C14/083; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C23C16/403; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A method for producing a turbine component having an adherent ceramic thermal barrier coating on at least a portion of its surface, comprising the steps of: (a) providing a superalloy substrate with a clean surface, (b) applying a metallic bond coating onto at least a portion of said substrate surface, (c) depositing a high purity alpha alumina layer substantially free of other metallic oxides and porosity on said bond coating by a chemical vapor deposition process; and (d) applying a ceramic thermal barrier coating onto the alumina layer.
Claim 2
Independent Claim
88 words
A method for producing a turbine component having an adherent ceramic thermal barrier coating on at least a portion of its surface, comprising the steps of: (a) providing a superalloy substrate with a clean surface, (b) applying a metallic bond coating onto at least a portion of said substrate surface, (c) depositing a high purity alpha alumina layer substantially free of other metallic oxides and porosity on said bond coating by a chemical vapor deposition process; and (d) applying a ceramic thermal barrier coating onto the alumina layer.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein said ceramic coating is applied by an electron beam, physical vapor deposition process.
Claim 4
Dependent Claim
18 words
The method of claim 2 wherein the ceramic coating is applied as a columnar grained coating containing zirconia.
Claim 5
Dependent Claim
18 words
The method of claim 3 further including the step of densifying the exterior surface of the ceramic coating.
Claim 6
Dependent Claim
24 words
The method of claim 1 wherein said metallic bond coating is applied by electron beam vapor deposition of a MCrAlY layer on said substrate.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein said MCrAlY layer is applied after aluminizing said substrate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-13 | 1994-11-12 | 1995-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-13 | 1998-11-12 | 1999-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-13 | 2002-11-12 | 2003-05-14 | $7700.00 | Window Closed / Lapsed |