US5985467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superalloy component with a protective coating system
Assignee: Siemens AG
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Filing: 1997-10-27
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Granted: 1999-11-16
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Expires: 2017-10-27
Abstract
Abstract A nickel-based or cobalt-based superalloy substrate is covered with a protective system which is resistant to thermal, corrosive and erosive attack. An anchoring layer is disposed on the substrate. The anchoring layer is formed as an oxide compound, in particular alumina, doped with nitrogen. A ceramic coating is disposed on the anchoring layer. The modification of the anchoring layer prevents the transmission of diffusing elements through the anchoring layer to the thermal barrier layer.
Inventors
- 👤 Wolfram Beele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:44
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C14/083; C23C28/00; C23C28/30; C23C28/32; C23C28/321; C23C28/3215; B; B32; B32B; B32B15/00; B32B15/04; B32B18/00; B32B7/00; B32B7/04; B32B7/12; C23C14/02; C23C14/024; C23C14/0676; C23C14/081; C23C28/04; C23C28/34; C23C28/345; C23C28/3455; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549; Y10T428/12611; Y10T428/12618
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
49 words
An article of manufacture, comprising: a substrate formed of a nickel or cobalt-based superalloy; an intermediate layer disposed on said substrate, said intermediate layer comprising an anchoring layer formed of an oxide compound doped with an effective amount of nitrogen; and a ceramic coating disposed on said anchoring layer.
Claim 2
Dependent Claim
49 words
An article of manufacture, comprising: a substrate formed of a nickel or cobalt-based superalloy; an intermediate layer disposed on said substrate, said intermediate layer comprising an anchoring layer formed of an oxide compound doped with an effective amount of nitrogen; and a ceramic coating disposed on said anchoring layer.
Claim 3
Dependent Claim
22 words
The article according to claim 1, wherein said intermediate layer further includes a bonding layer between said substrate and said anchoring layer.
Claim 4
Dependent Claim
23 words
The article according to claim 1, wherein said oxide compound comprises an oxide selected from the group consisting of alumina and chromium oxide.
Claim 5
Dependent Claim
14 words
The article according to claim 1, wherein said oxide compound consists essentially of alumina.
Claim 6
Dependent Claim
19 words
The article according to claim 1, which further comprises a diffusion active chemical element covered by said anchoring layer.
Claim 7
Dependent Claim
26 words
The article according to claim 5, wherein said diffusion active chemical element is an element selected from the group consisting of hafnium, titanium, tungsten, and silicon.
Claim 8
Dependent Claim
14 words
The article according to claim 1, wherein said ceramic coating includes ZrO 2 .
Claim 9
Dependent Claim
35 words
The article according to claim 1, wherein said ceramic coating consists essentially of ZrO 2 and a stabilizer selected from the group consisting of Y 2 O 3 , CeO 2 , LaO, and MgO.
Claim 10
Dependent Claim
24 words
The article according to claim 1 wherein said anchoring layer has a thickness ranging from a few atomic layers to less than 3 mm.
Claim 11
Dependent Claim
19 words
The article according to claim 1, wherein said anchoring layer contains from 2 to 5 atom percent of nitrogen.
Claim 12
Dependent Claim
33 words
The article according to claim 1, wherein said anchoring layer is doped with a further chemical element selected from the group consisting of the elements contained in said substrate and said bonding layer.
Claim 13
Dependent Claim
13 words
The article according to claim 11, wherein said further chemical element is chromium.
Claim 14
Dependent Claim
29 words
The article according to claim 11, wherein said anchoring layer is doped with a further chemical element, and said further chemical element is also present in the ceramic coating.
Claim 15
Dependent Claim
16 words
The article according to claim 2, wherein said bonding layer is formed of a metal aluminide.
Claim 16
Dependent Claim
16 words
The article according to claim 2, wherein said bonding layer is formed of an MCrAlY alloy.
Claim 17
Dependent Claim
28 words
The article according to claim 2, wherein said anchoring layer is doped with a further chemical element, and said further element is also present in said bonding layer.
Claim 18
Dependent Claim
22 words
The article according to claim 1, wherein said substrate, said anchoring layer, and said ceramic coating together form a gas turbine component.
Claim 19
Dependent Claim
70 words
The article according to claim 17, wherein said gas turbine component is a gas turbine airfoil component comprising a mounting portion and an airfoil portion, said mounting portion being adapted to fixedly hold the component in operation and said airfoil portion being adapted to be exposed in operation to a gas stream along said component, and wherein said anchoring layer and said ceramic layer are disposed on said airfoil portion.
Claim 20
Dependent Claim
23 words
The article according to claim 1, wherein said intermediate layer further comprises a bonding layer interposed between said substrate and said anchoring layer.
References Cited (Backward Citations)
US4055705A
Cited
US4321311A
Cited
US4321310A
Cited
US4335190A
Cited
US4676994A
Cited
US4904528A
Cited
US5002834A
Cited
US5262245A
Cited
US4880614A
Cited
US5154885A
Cited
US5268238A
Cited
US5273712A
Cited
US5087477A
Cited
US5238752A
Cited
US5401307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-15 | 2003-05-17 | 2003-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-15 | 2007-05-17 | 2007-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-15 | 2011-05-17 | 2011-11-16 | $7700.00 | Window Closed / Lapsed |