Patent US5419971A successfully refreshed from Google Patents.
US5419971A
Expired / Lapsed
US
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Enhanced thermal barrier coating system
Assignee: General Electric Co
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Filing: 1993-03-03
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Granted: 1995-05-30
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Expires: 2013-03-03
Abstract
Abstract An article having a substrate is protected by a thermal barrier coating system. An interfacial layer contacts the upper surface of the substrate. The interfacial layer may comprise a bond coat only, or a bond coat and an overlay coat. The interfacial layer has on its upper surface a preselected, controllable pattern of three-dimensional features, such as grooves in a parallel array or in two angularly offset arrays. The features are formed by an ablation process using an ultraviolet laser such as an excimer laser. A ceramic thermal barrier coating is deposited over the pattern of features on the upper surface of the interfacial layer.
Inventors
- 👤 David W. Skelly
- 👤 Bangalore A. Nagaraj
- 👤 David J. Wortman
- 👤 David V. Rigney
- 👤 Seetha R. Mannava
- 👤 Rudolfo Viguie
- 👤 Robert W. Bruce
- 👤 Warren A. Nelson
- 👤 Curtis A. Johnson
- 👤 Bhupendra K. Gupta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:57
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288; C; C23; C23C; C23C4/00; C23C4/02; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12472; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618; Y10T428/12993; Y10T428/24; Y10T428/24479; Y10T428/24521; Y10T428/24545; Y10T428/24612
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
An article protected by a thermal barrier coating system, comprising substrate means for supporting a thermal barrier coating, the substrate means having a shape selected from the group consisting of a turbine blade and a turbine vane and further having a substrate means upper surface with a preselected pattern of three-dimensional features wherein the preselected pattern has a crack-impeding geometry, and wherein the features are grooves in a direction lying in the plane of the substrate means upper surface; and a thermal barrier coating contacting the substrate upper surface.
Claim 2
Dependent Claim
89 words
An article protected by a thermal barrier coating system, comprising substrate means for supporting a thermal barrier coating, the substrate means having a shape selected from the group consisting of a turbine blade and a turbine vane and further having a substrate means upper surface with a preselected pattern of three-dimensional features wherein the preselected pattern has a crack-impeding geometry, and wherein the features are grooves in a direction lying in the plane of the substrate means upper surface; and a thermal barrier coating contacting the substrate upper surface.
Claim 3
Dependent Claim
36 words
The article of claim 1, additionally comprising an interfacial layer having an interfacial layer upper surface, wherein the interfacial layer contacts the substrate upper surface and the thermal barrier coating contacts the interfacial layer upper surface.
Claim 4
Dependent Claim
90 words
An article protected by a thermal barrier coating system, comprising a substrate having a substrate upper surface; an interfacial layer contacting the substrate upper surface and having an interfacial layer upper surface, the interfacial layer having on the interfacial layer upper surface, but not on the upper surface of the substrate, a preselected pattern of three-dimensional features wherein the preselected pattern has a crack-impeding geometry, wherein the three-dimensional features are selected from a group consisting of grooves and dimples; and a thermal barrier coating contacting the interfacial layer upper surface.
Claim 5
Dependent Claim
90 words
An article protected by a thermal barrier coating system, comprising a substrate having a substrate upper surface; an interfacial layer contacting the substrate upper surface and having an interfacial layer upper surface, the interfacial layer having on the interfacial layer upper surface, but not on the upper surface of the substrate, a preselected pattern of three-dimensional features wherein the preselected pattern has a crack-impeding geometry, wherein the three-dimensional features are selected from a group consisting of grooves and dimples; and a thermal barrier coating contacting the interfacial layer upper surface.
Claim 6
Dependent Claim
80 words
An article protected by a thermal barrier coating system, comprising a substrate having a substrate upper surface; an interfacial layer contacting the substrate upper surface and having an interfacial layer upper surface, wherein the upper surface of the substrate and the upper surface of the interfacial layer have a preselected pattern of three-dimensional features, wherein the features are grooves, and further wherein the preselected pattern has a crack-impeding geometry; and a thermal barrier coating contacting the interfacial layer upper surface.
Claim 7
Dependent Claim
80 words
An article protected by a thermal barrier coating system, comprising a substrate having a substrate upper surface; an interfacial layer contacting the substrate upper surface and having an interfacial layer upper surface, wherein the upper surface of the substrate and the upper surface of the interfacial layer have a preselected pattern of three-dimensional features, wherein the features are grooves, and further wherein the preselected pattern has a crack-impeding geometry; and a thermal barrier coating contacting the interfacial layer upper surface.
Claim 8
Dependent Claim
37 words
The article of claim 3, wherein the interfacial layer comprises a metallic bond coat having a bond coat upper surface, and an overlay coat contacting the bond coat upper surface and having an overlay coat upper surface.
Claim 9
Dependent Claim
23 words
The article of claim 5, wherein the three-dimensional features are present in the bond coat upper surface and the overlay coat upper surface.
Claim 10
Dependent Claim
25 words
The article of claim 5, wherein the bond coat upper surface is smooth and the three-dimensional features are present in the overlay coat upper surface.
Claim 11
Dependent Claim
17 words
An article as in claim 1 or claim 3, wherein the substrate is made of a superalloy.
Claim 12
Dependent Claim
21 words
An article as in claim 3, wherein the substrate is in the form of a component of a gas turbine engine.
Claim 13
Dependent Claim
24 words
An article as in claim 1 or claim 3, wherein the three dimensional features are produced by removal of material by a high-energy beam.
Claim 14
Dependent Claim
18 words
An article as in claim 2 or claim 3, wherein the interfacial layer comprises a metallic bond coat.
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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) | 1998-05-29 | 1998-11-28 | 1999-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-29 | 2002-11-28 | 2003-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-29 | 2006-11-28 | 2007-05-30 | $7700.00 | Window Closed / Lapsed |