Patent US5034284A successfully refreshed from Google Patents.
US5034284A
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US
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Thermal fatigue resistant coatings
Assignee: RTX Corp
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Filing: 1990-05-10
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Granted: 1991-07-23
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Expires: 2010-05-10
Abstract
Abstract Thermomechanical fatigue failure in components in high performance gas turbine engines is diminished by providing the component with an overlay of a metallic coating and a strain isolating layer located between the surface of the component and the metallic coating overlay.
Inventors
- 👤 Norman S. Bornstein
- 👤 Michael A. DeCrescente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:39
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288; B; B32; B32B; B32B15/00; B32B15/01; C; C23; C23C; C23C4/00; C23C4/02; C23C4/18; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10S428/9335; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
In an article comprising a nickel base superalloy substrate and an oxidation resistant metal alloy coating thereon, the improvement which comprises reducing thermomechanical fatigue failure is said article by providing a compliant strain isolating layer between said substrate and said coating in which the thickness of said strain isolating layer does not exceed 30% of the thickness of the oxidation resistant layer.
Claim 2
Dependent Claim
62 words
In an article comprising a nickel base superalloy substrate and an oxidation resistant metal alloy coating thereon, the improvement which comprises reducing thermomechanical fatigue failure is said article by providing a compliant strain isolating layer between said substrate and said coating in which the thickness of said strain isolating layer does not exceed 30% of the thickness of the oxidation resistant layer.
Claim 3
Dependent Claim
21 words
The article of claim 1 in which the thickness of the oxidation resistant layer is about 0.010 to 0.015 mils thick.
Claim 4
Dependent Claim
42 words
The article of claim 1 in which the strain isolating layer is provided by spraying a mixture of metal alloy and organic polymer particles onto said substrate and subsequently heating the resulting article to eliminate the polymer and produce a porous layer.
Claim 5
Dependent Claim
12 words
A component of a turbine which is the article of claim 1.
Claim 6
Independent Claim
70 words
A method of diminishing thermomechanical failure in a component of a high performance gas turbine which is to be coated with a protective metallic coating which comprises providing a porous metallic strain isolation layer on the surface of said component and thereafter applying the metallic coating on said porous layer, wherein the thickness of said strain isolation layer does not exceed 30% of the thickness of the protective metallic coating.
Claim 7
Independent Claim
70 words
A method of diminishing thermomechanical failure in a component of a high performance gas turbine which is to be coated with a protective metallic coating which comprises providing a porous metallic strain isolation layer on the surface of said component and thereafter applying the metallic coating on said porous layer, wherein the thickness of said strain isolation layer does not exceed 30% of the thickness of the protective metallic coating.
Claim 8
Dependent Claim
14 words
The method of claim 4 wherein the porous layer is provided by plasma deposition.
Claim 9
Dependent Claim
21 words
The method of claim 4 wherein the component is a nickel base superalloy and the outermost coating is a NiCoCrAlY alloy.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |