US5834070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing protective coatings with chemical composition and structure gradient across the thickness
Assignee: E O PATON ELECTRIC WELDING INSTITUTE
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Filing: 1997-04-03
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Granted: 1998-11-10
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Expires: 2017-04-03
Abstract
Abstract The invention relates to the production of protective coatings for parts of gas turbines and internal combustion engines which are to be subjected to thermal loading. A coating formed in accordance with the invention has a chemical composition and structure gradient across its thickness and an outer ceramic layer. The coating is obtained by electron beam heating of a mixture of metals (alloys) and oxides which have different vapor pressures at the evaporation temperature, the mixture and an underlying ceramic ingot being serially evaporated and subsequently condensed on the part to be coated.
Inventors
- 👤 Boris A. Movchan
- 👤 Jury E. Rudoy
- 👤 Igor S. Malashenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:42
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/28; C23C14/30; C23C14/02; C23C14/027; C23C14/06; C23C14/0688
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
135 words
In a method for producing a protective coating having a chemical composition and structure gradient across its thickness and a ceramic outer layer, the coating being formed on a substrate, the method including: heating the substrate in a vacuum; heating a ceramic ingot in the vacuum with an electron beam to evaporate material from the ingot; and condensing the material evaporated from the ingot on the heated substrate; the improvement comprising: applying a mixture of materials on the surface of the ingot which is to be impinged upon by the electron beam, the mixture comprising metals or alloys and oxides with different vapor pressures at the evaporation temperature of the ingot, whereby the mixture is electron beam heated, evaporated and condensed on the substrate prior to the evaporation of the material from the ceramic ingot.
Claim 2
Dependent Claim
135 words
In a method for producing a protective coating having a chemical composition and structure gradient across its thickness and a ceramic outer layer, the coating being formed on a substrate, the method including: heating the substrate in a vacuum; heating a ceramic ingot in the vacuum with an electron beam to evaporate material from the ingot; and condensing the material evaporated from the ingot on the heated substrate; the improvement comprising: applying a mixture of materials on the surface of the ingot which is to be impinged upon by the electron beam, the mixture comprising metals or alloys and oxides with different vapor pressures at the evaporation temperature of the ingot, whereby the mixture is electron beam heated, evaporated and condensed on the substrate prior to the evaporation of the material from the ceramic ingot.
Claim 3
Dependent Claim
23 words
The method of claim 1, wherein the mixture of materials is applied to the surface of the ceramic ingot by a chemical-metallurgical process.
Claim 4
Dependent Claim
27 words
The method of claim 1, wherein the mixture of materials is in the form of a pressed and vacuum annealed metallic-ceramic pellet placed on the ceramic ingot.
Claim 5
Dependent Claim
30 words
The method of claim 1 wherein the ceramic ingot is comprised of stabilized zirconia and the mixture of materials is a system comprising Al--Al 2 O 3 --ZrO 2 .
Claim 6
Dependent Claim
30 words
The method of claim 2 wherein the ceramic ingot is comprised of stabilized zirconia and the mixture of materials is a system comprising Al--Al 2 O 3 --ZrO 2 .
Claim 7
Dependent Claim
30 words
The method of claim 3 wherein the ceramic ingot is comprised of stabilized zirconia and the mixture of materials is a system comprising Al--Al 2 O 3 --ZrO 2 .
Claim 8
Dependent Claim
33 words
The method of claim 4 wherein the constituents of the system are present in the following proportions by weight: Al--5 to 40% Al 2 O 3 --1 to 60% ZrO 2 --the remainder.
Claim 9
Dependent Claim
30 words
The method of claim 1 wherein the ceramic ingot is comprised of stabilized zirconia and said mixture of materials is a system comprising Al--Si--Al 2 O 3 --Y--ZrO 2 .
Claim 10
Dependent Claim
30 words
The method of claim 2 wherein the ceramic ingot is comprised of stabilized zirconia and said mixture of materials is a system comprising Al--Si--Al 2 O 3 --Y--ZrO 2 .
Claim 11
Dependent Claim
30 words
The method of claim 3 wherein the ceramic ingot is comprised of stabilized zirconia and said mixture of materials is a system comprising Al--Si--Al 2 O 3 --Y--ZrO 2 .
Claim 12
Dependent Claim
39 words
The method of claim 8 wherein the constituents of the system are present in the following proportions by weight: Al--5 to 40% Si--0.3 to 3% Al 2 O 3 --3 to 84% Y--0 to 1.5% ZrO 2 --the remainder.
Claim 13
Dependent Claim
30 words
The method of claim 1 wherein the ceramic ingot is comprised of stabilized zirconia and the mixture of materials is a system comprising Al--Cr--Ni--Al 2 O 3 --Y--ZrO 2 .
Claim 14
Dependent Claim
30 words
The method of claim 2 wherein the ceramic ingot is comprised of stabilized zirconia and the mixture of materials is a system comprising Al--Cr--Ni--Al 2 O 3 --Y--ZrO 2 .
Claim 15
Dependent Claim
30 words
The method of claim 3 wherein the ceramic ingot is comprised of stabilized zirconia and the mixture of materials is a system comprising Al--Cr--Ni--Al 2 O 3 --Y--ZrO 2 .
Claim 16
Dependent Claim
41 words
The method of claim 12 wherein the constituents of the system are present in the following proportions by weight: Al--2 to 18% Cr--5 to40% Ni--0 to 40% Al 2 O 3 --2 to 58% Y--0 to 1.5% ZrO 2 --the remainder.
Claim 17
Dependent Claim
30 words
The method of claim 1 wherein the ceramic ingot is comprised of stabilized zirconia and the mixture of materials is a system comprising Al--Cr--(Ni,Co)--Al 2 O 3 --Y--Pt--ZrO 2 .
Claim 18
Dependent Claim
30 words
The method of claim 2 wherein the ceramic ingot is comprised of stabilized zirconia and the mixture of materials is a system comprising Al--Cr--(Ni,Co)--Al 2 O 3 --Y--Pt--ZrO 2 .
Claim 19
Dependent Claim
30 words
The method of claim 3 wherein the ceramic ingot is comprised of stabilized zirconia and the mixture of materials is a system comprising Al--Cr--(Ni,Co)--Al 2 O 3 --Y--Pt--ZrO 2 .
Claim 20
Dependent Claim
45 words
The method of claim 16 wherein the constituents of the system are present in the following proportions by weight: Al--4 to12% Cr--10 to25% Ni--25 to 45% Co--25 to 45% Al 2 O 3 --1 to 60% Y--0.5 to2.5 Pt--0.5 to 2.5 ZrO 2 --the remainder.
Claim 21
Dependent Claim
35 words
The method of claim 1 wherein the mixture of materials is uniformly blended and includes the following constituents: Al; Al 2 O 3 ; and a metal oxide having the same composition as the ingot.
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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) | 2001-11-09 | 2002-05-11 | 2002-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-09 | 2006-05-11 | 2006-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-09 | 2010-05-11 | 2010-11-10 | $7700.00 | Window Closed / Lapsed |