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US4369233A
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US
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Process to apply a protecting silicon containing coating on specimen produced from superalloys and product
Assignee: ELBAR BV
•
Filing: 1979-07-19
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Granted: 1983-01-18
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Expires: 1999-07-19
Abstract
Abstract This invention is concerned with a process for applying a protecting silicon-containing coating on a superalloy. The invention further concerns the thus obtained specimens having a protective coating.
Inventors
- 👤 Teunis van Schaik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:44
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C23C10/58; C23C10/02; C23C28/00; C23C28/02; C23C28/023; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12674; Y10T428/12771; Y10T428/12806; Y10T428/12861; Y10T428/12931; Y10T428/12937; Y10T428/12944
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A process for applying a protective silicon-containing coating on a super alloy, subject to high temperature corrosion, comprising: (a) applying a first coating layer to said super alloy, said first coating layer comprising at least one of the elements selected from the group consisting of Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W; (b) heating the so-formed coated super alloy to a temperature of 800°-1300° C. under a protecting atmosphere; (c) removing the phase rich in the elements set forth in step (a), wherein the phase rich in the elements set forth in step (a) contains more than 25 weight % thereof; (d) applying a silicon layer to the product of step (c); and (e) heating the product of step (d) to a temperature of 800°-1000° C.
Claim 2
Dependent Claim
130 words
A process for applying a protective silicon-containing coating on a super alloy, subject to high temperature corrosion, comprising: (a) applying a first coating layer to said super alloy, said first coating layer comprising at least one of the elements selected from the group consisting of Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W; (b) heating the so-formed coated super alloy to a temperature of 800°-1300° C. under a protecting atmosphere; (c) removing the phase rich in the elements set forth in step (a), wherein the phase rich in the elements set forth in step (a) contains more than 25 weight % thereof; (d) applying a silicon layer to the product of step (c); and (e) heating the product of step (d) to a temperature of 800°-1000° C.
Claim 3
Dependent Claim
13 words
The process according to claim 1, wherein said first coating layer is Ti.
Claim 4
Dependent Claim
19 words
The process according to claim 2, wherein said first coating layer of Ti is applied by the ion-plating process.
Claim 5
Dependent Claim
18 words
The process according to claim 3, wherein the heating of step (b) is carried out under decreased pressure.
Claim 6
Dependent Claim
20 words
The process according to claim 4, wherein the decreased pressure is a vacuum of 10 -5 to 10 -12 mbar.
Claim 7
Dependent Claim
30 words
The process according to claim 1, wherein the temperature treatment of step (b) is carried out near to one of the temperatures of the heat treatment of the super alloy.
Claim 8
Dependent Claim
28 words
The process according to claim 1, wherein the phase rich in the elements set forth in step (a) is removed by blasting with Al 2 O 3 -grit.
Claim 9
Dependent Claim
16 words
The process according to claim 1, wherein the silicon layer is applied by the pack-coat process.
Claim 10
Dependent Claim
9 words
The product produced by the process of claim 1.
Claim 11
Dependent Claim
24 words
A super alloy having a protective coating layer wherein the protective coating layer comprises a Ti-Si-Ni alloy which is mainly present in the G-phase.
Claim 12
Dependent Claim
24 words
A super alloy having a protective coating layer wherein the protective coating layer comprises a Ti-Si-Ni alloy which is mainly present in the G-phase.
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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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |