US4822689A
Expired / Lapsed
US
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High volume fraction refractory oxide, thermal shock resistant coatings
Assignee: Praxair ST Technology Inc
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Filing: 1986-08-26
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Granted: 1989-04-18
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Expires: 2006-08-26
Abstract
Abstract A coating composition applied to a substrate by thermal spray process, characterized by improved wear, thermal shock resistance and chemical resistance at elevated temperatures, the coating composition containing greater than about 60 volume percent refractory oxide with the balance comprising a cobalt and/or nickel and/or iron base metal matrix containing chromium, aluminum and tantalum.
Inventors
- 👤 Harold H. Fukubayashi
- 👤 Kenichi Tsushima
- 👤 Robert C. Tucker, Jr.
- 👤 Thomas A. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:19
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/10; C23C4/06; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
109 words
A powdered coating composition comprising about 60 to 95 volume percent refractory oxide and a metal alloy comprising about 17 to 35 weight percent chromium, about 5 to about 14 weight percent aluminum, about 5 to about 20 weight percent tantalum, 0 to about 3.5 weight percent carbon, 0 to about 2 weight percent yttrium, 0 to about 2.5 weight percent silicon, 0 to about 3 weight percent tungsten, 0 to about 3 weight percent molybdenum, 0 to about 3 weight percent manganese, and at least one metal selected from the group consisting of cobalt, nickel, and iron, the weight percentages based upon the weight of the metal alloy.
Claim 2
Dependent Claim
109 words
A powdered coating composition comprising about 60 to 95 volume percent refractory oxide and a metal alloy comprising about 17 to 35 weight percent chromium, about 5 to about 14 weight percent aluminum, about 5 to about 20 weight percent tantalum, 0 to about 3.5 weight percent carbon, 0 to about 2 weight percent yttrium, 0 to about 2.5 weight percent silicon, 0 to about 3 weight percent tungsten, 0 to about 3 weight percent molybdenum, 0 to about 3 weight percent manganese, and at least one metal selected from the group consisting of cobalt, nickel, and iron, the weight percentages based upon the weight of the metal alloy.
Claim 3
Dependent Claim
26 words
The powdered coating composition of claim 1 wherein the metal alloy comprises up to 30 weight percent iron, based upon the weight of the metal alloy.
Claim 4
Dependent Claim
31 words
The powdered coating composition of claim 1 wherein the metal alloy further comprises at least one member selected from the group consisting of vanadium, rare earth metals, hafnium, platinum and rhodium.
Claim 5
Dependent Claim
26 words
The powdered coating composition of claim 1 wherein the refractory oxide comprises at least one member selected from the group consisting of alumina, zirconia and chromia.
Claim 6
Dependent Claim
13 words
The powdered coating composition of claim 4 wherein the refractory oxide comprises alumina.
Claim 7
Dependent Claim
45 words
The powdered coating composition of claim 1 wherein the metal alloy comprises 0 to about 2 weight percent silicon, about 0.5 to about 3.5 weight percent carbon, based upon the weight of the metal alloy, and wherein the balance of the metal alloy is cobalt.
Claim 8
Dependent Claim
55 words
The powdered coating composition of claim 6 wherein the refractory oxide comprises alumina and the metal alloy comprises 54 weight percent cobalt, 25 weight percent chromium, 10 weight percent tantalum, 7.5 weight percent aluminum, 0.8 weight percent yttrium, 0.7 weight percent silicon and 2 weight percent carbon, based upon the weight of the metal alloy.
Claim 9
Dependent Claim
27 words
The powdered coating composition of claim 1 wherein the refractory oxide is in an amount of about 70 to 85 volume percent of the powdered coating composition.
Claim 10
Dependent Claim
27 words
The powdered coating composition of claim 1 wherein the refractory oxide is in an amount of about 65 to 90 volume percent of the powdered coating composition.
Claim 11
Dependent Claim
123 words
An article comprising a substrate and a coating upon the surface of the substrate, the coating comprising about 60 to about 95 volume percent refractory oxide and a metal alloy comprising about 17 to about 35 weight percent chromium, about 5 to about 14 weight percent aluminum, about 5 to about 20 weight percent tantalum, 0 to about 3.5 weight percent carbon, 0 to about 2 weight percent yttrium, 0 to about 2.5 weight percent silicon, 0 to about 3 weight percent tungsten, 0 to about 3 weight percent molybdenum, 0 to about 3 weight percent manganese, and at least one metal selected from the group consisting of cobalt, nickel, and iron, the weight percentages based upon the weight of the metal alloy.
Claim 12
Dependent Claim
123 words
An article comprising a substrate and a coating upon the surface of the substrate, the coating comprising about 60 to about 95 volume percent refractory oxide and a metal alloy comprising about 17 to about 35 weight percent chromium, about 5 to about 14 weight percent aluminum, about 5 to about 20 weight percent tantalum, 0 to about 3.5 weight percent carbon, 0 to about 2 weight percent yttrium, 0 to about 2.5 weight percent silicon, 0 to about 3 weight percent tungsten, 0 to about 3 weight percent molybdenum, 0 to about 3 weight percent manganese, and at least one metal selected from the group consisting of cobalt, nickel, and iron, the weight percentages based upon the weight of the metal alloy.
Claim 13
Dependent Claim
24 words
The article of claim 10 wherein the metal alloy comprises up to 30 weight percent iron, based upon the weight of the metal alloy.
Claim 14
Dependent Claim
29 words
The article of claim 10 wherein the metal alloy further comprises at least one member selected from the group consisting of vanadium, rare earth metals, hafnium, platinum and rhodium.
Claim 15
Dependent Claim
24 words
The article of claim 10 wherein the refractory oxide comprises at least one member selected from the group consisting of alumina, zirconia and chromia.
Claim 16
Dependent Claim
11 words
The article of claim 13 wherein the refractory oxide comprises alumina.
Claim 17
Dependent Claim
43 words
The article of claim 13 wherein the metal alloy comprises 0 to about 2 weight percent silicon, about 0.5 to about 3.5 weight percent carbon, based upon the weight of the metal alloy, and wherein the balance of the metal alloy is cobalt.
Claim 18
Dependent Claim
53 words
The article of claim 15 wherein the refractory oxide comprises alumina and the metal alloy comprises 54 weight percent cobalt, 25 weight percent chromium, 10 weight percent tantalum, 7.5 weight percent aluminum, 0.8 weight percent yttrium, 0.7 weight percent silicon and 2 weight percent carbon, based upon the weight of the metal alloy.
Claim 19
Dependent Claim
25 words
The article of claim 10 wherein the refractory oxide is in an amount of about 70 to 85 volume percent of the of the coating.
Claim 20
Dependent Claim
23 words
The article of claim 10 wherein the refractory oxide is in an amount of about 65 to 90 volume percent of the coating.
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |