US4808487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection layer
Assignee: Plasmainvent AG
•
Filing: 1986-04-17
•
Granted: 1989-02-28
•
Expires: 2006-04-17
Abstract
Abstract The protection layer (3,4,5) applied to a support (1) by a vacuum plasma spraying process comprises an adherence layer (3), an intermediate layer (4) and a coating layer (5). In order to enable a universal application of the protection, particularly in the construction of turbines, foundry and nuclear technique, the adherence layer (3) is made of a selected material having a composition and a thermal expansion coefficient close to those of the material of the object to be coated (1). The intermediate layer (4) is comprised of a mixture of the material of the adherence layer (3) and of that of the coating layer (5) and the coating layer is comprised of a thick layer of sprayed material selected in the group of borides, carbides, nitrides and oxides of preferably TiB 2 or Al 2 O 3 .
Inventors
- 👤 Heiko Gruenr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:47
CPC Classifications
C; C23; C23C; C23C28/00; C23C4/00; C23C4/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12639; Y10T428/12646; Y10T428/12771; Y10T428/12806
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
A layered protective structure applied to a metallic support by a vacuum plasma projection process, said protective structure comprising: a crack- and pore-free adherence layer densely sprayed directly on the metallic support, said adherence layer consisting essentially of a material whose chemical composition is basically that of the material of the metallic support and which has a thermal expansion co-efficient substantially the same as that of the support; a crack- and pore-free intermediate layer densely sprayed directly on said adherence layer, said intermediate layer consisting essentially of a composite of the adherence layer and TiB 2 ; and a crack- and pore-free coating layer densely sprayed directly on said intermediate layer, said coating layer consisting essentially of TiB 2 ; wherein said adherence layer is about 20 to 200 μm thick, said intermediate layer is about 0.02 to 5 mm thick, and said coating layer is about 20 to 500 μm thick.
Claim 2
Dependent Claim
152 words
A layered protective structure applied to a metallic support by a vacuum plasma projection process, said protective structure comprising: a crack- and pore-free adherence layer densely sprayed directly on the metallic support, said adherence layer consisting essentially of a material whose chemical composition is basically that of the material of the metallic support and which has a thermal expansion co-efficient substantially the same as that of the support; a crack- and pore-free intermediate layer densely sprayed directly on said adherence layer, said intermediate layer consisting essentially of a composite of the adherence layer and TiB 2 ; and a crack- and pore-free coating layer densely sprayed directly on said intermediate layer, said coating layer consisting essentially of TiB 2 ; wherein said adherence layer is about 20 to 200 μm thick, said intermediate layer is about 0.02 to 5 mm thick, and said coating layer is about 20 to 500 μm thick.
Claim 3
Dependent Claim
36 words
A structure according to 1 wherein the support and said adherence layer consist essentially of Ti or Ti alloy and said intermediate layer consists essentially of 80% Ti or Ti alloy and 20% TiB 2 .
Claim 4
Dependent Claim
36 words
A structure according to 1 wherein the support and said adherence layer consist essentially of Ti or Ti alloy and said intermediate layer consists essentially of 80% Ti or Ti alloy and 20% TiB 2 .
Claim 5
Dependent Claim
53 words
A structure according to claim 1 wherein the support consists essentially of an M-CrAly alloy wherein M is selected from the group consisting of Fe, Co, Ni and NiCo and said adherence layer consists essentially of an alloy of M-CrAlY, M being selected from the group consisting of Fe, Co, Ni and NiCo.
Claim 6
Dependent Claim
32 words
A structure according to claim 3 wherein the material of said intermediate layer consists of 100% M-CrAlY adjacent the adherence layer and gradually changing to 100% TiB 2 adjacent the coating layer.
Claim 7
Dependent Claim
31 words
A structure according to claim 1, wherein the support and said adherence layer consist essentially of steel and said intermediate layer consists essentially of 50% steel and 50% TiB 2 .
Claim 8
Dependent Claim
35 words
A structure according to claim 1 wherein the support and said adherence layer consist essentially of an iron-nickel-chromium based alloy and the intermediate layer consists essentialy of said iron-nickel-chronium base alloy and TiB 2 .
References Cited (Backward Citations)
FR1215417A
Cited
US3010009A
Cited
US3839618A
Cited
US3758233A
Cited
US3802850A
Cited
US3911891A
Cited
US4328257A
Cited
US4328257B1
Cited
US4503130A
Cited
GB2117415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |