US4496635A
Expired / Lapsed
US
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Amorphous metal alloy and composite
Assignee: United States Department of Energy
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Filing: 1982-03-19
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Granted: 1985-01-29
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Expires: 2002-03-19
Abstract
Abstract Amorphous metal alloys of the iron-chromium and nickel-chromium type have excellent corrosion resistance and high temperature stability and are suitable for use as a protective coating on less corrosion resistant substrates. The alloys are stabilized in the amorphous state by one or more elements of titanium, zirconium, hafnium, niobium, tantalum, molybdenum, and tungsten. The alloy is preferably prepared by sputter deposition.
Inventors
- 👤 Rong Wang
- 👤 Martin D. Merz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:56
CPC Classifications
C; C22; C22C; C22C45/00; C22C45/008; C23; C23C; C23C30/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944; Y10T428/12951
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
An amorphous metal alloy capable of remaining amorphous at temperatures up to at least 400° C., consisting essentially of the formula M a Cr b T c , where M is at least one element selected from the group consisting of iron and nickel, T is at least one element selected from the group consisting of titanium, zirconium, hafnium, niobium, tantalum, molybdenum and tungsten and where a is 35 to 75 atom percent, b is 5 to 20 atom percent, c is 5 to 55 atom percent, and b and c are at least 25 atom percent.
Claim 2
Dependent Claim
97 words
An amorphous metal alloy capable of remaining amorphous at temperatures up to at least 400° C., consisting essentially of the formula M a Cr b T c , where M is at least one element selected from the group consisting of iron and nickel, T is at least one element selected from the group consisting of titanium, zirconium, hafnium, niobium, tantalum, molybdenum and tungsten and where a is 35 to 75 atom percent, b is 5 to 20 atom percent, c is 5 to 55 atom percent, and b and c are at least 25 atom percent.
Claim 3
Dependent Claim
100 words
A substrate coated with an amorphous metal alloy capable of remaining amorphous at temperatures up to at least 400° C., consisting essentially of the formula M a Cr b T c where M is at least one element selected from the group consisting of iron and nickel, T is at least one element selected from the group consisting of titanium, zirconium, hafnium, niobium, tantalum, molybdenum and tungsten and where a is 35 to 75 atom percent, b is 5 to 20 atom percent, c is 5 to 55 atom percent, and b and c are at least 25 atom percent.
Claim 4
Dependent Claim
100 words
A substrate coated with an amorphous metal alloy capable of remaining amorphous at temperatures up to at least 400° C., consisting essentially of the formula M a Cr b T c where M is at least one element selected from the group consisting of iron and nickel, T is at least one element selected from the group consisting of titanium, zirconium, hafnium, niobium, tantalum, molybdenum and tungsten and where a is 35 to 75 atom percent, b is 5 to 20 atom percent, c is 5 to 55 atom percent, and b and c are at least 25 atom percent.
Claim 5
Dependent Claim
14 words
The amorphous metal alloy of claim 1 where M is both iron and nickel.
Claim 6
Dependent Claim
18 words
The amorphous alloy of claim 3 where T is selected from the group consisting of titanium and tungsten.
Claim 7
Dependent Claim
42 words
The amorphous alloy of claim 4 where iron is present from 32 to 65 atom percent, nickel is present from 3 to 6 atom percent, b is from 9 to 19 atom percent and c is from 10 to 50 atom percent.
Claim 8
Dependent Claim
23 words
The amorphous metal alloy of claim 1 wherein the alloy is prepared by sputter deposition onto a substrate cooled to below 100° C.
Claim 9
Dependent Claim
15 words
The substrate containing a coating of claim 2 where M is both iron and nickel.
Claim 10
Dependent Claim
20 words
The substrate containing a coating of claim 7 where T is selected from the group consisting of titanium and tungsten.
Claim 11
Dependent Claim
44 words
The substrate containing a coating of claim 8 where iron is present from 32 to 65 atom percent, nickel is present from 3 to 6 atom percent, b is from 9 to 19 atom percent and c is from 10 to 50 atom percent.
References Cited (Backward Citations)
US4255189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |