US4036638A
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Binary amorphous alloys of iron or cobalt and boron
Assignee: Honeywell International Inc
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Filing: 1975-11-28
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Granted: 1977-07-19
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Expires: 1995-11-28
Abstract
Abstract Binary amorphous alloys of iron or cobalt and boron have high mechanical hardnesses and soft magnetic properties and do not embrittle when heat treated at temperatures employed in subsequent processing steps, as compared with prior art amorphous alloys. The alloys have the formula MaBb, where M is iron or cobalt, a ranges from about 75 to 85 atom percent and b ranges from 15 to 25 atom percent.
Inventors
- 👤 Ranjan Ray
- 👤 Sheldon Kavesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:58
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15308; C; C22; C22C; C22C45/00; C22C45/008
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
A binary amorphous metal alloy that is about 100% amorphous having high mechanical hardness of at least about 1000 kg/mm 2 , a tensile strength of at least about 470,000 psi and an elastic moduli of at least about 23× 10 6 psi (in a saturating field), a saturation magnetization of at least about 10.8 kGauss and a coercive force less than about 0.1 Oe, characterized in that the alloy consists of the binary composition M a B b , where M is one element selected from the group consisting of iron and cobalt, B is boron, a ranges from about 75 to 85 atom percent and b ranges from about 15 to 25 atom percent.
Claim 2
Dependent Claim
116 words
A binary amorphous metal alloy that is about 100% amorphous having high mechanical hardness of at least about 1000 kg/mm 2 , a tensile strength of at least about 470,000 psi and an elastic moduli of at least about 23× 10 6 psi (in a saturating field), a saturation magnetization of at least about 10.8 kGauss and a coercive force less than about 0.1 Oe, characterized in that the alloy consists of the binary composition M a B b , where M is one element selected from the group consisting of iron and cobalt, B is boron, a ranges from about 75 to 85 atom percent and b ranges from about 15 to 25 atom percent.
Claim 3
Dependent Claim
57 words
The amorphous metal alloy of claim 1 in which the alloy consists essentially of a composition selected from the group consisting of Fe 83 B 17 , Fe 80 B 20 , Fe 78 B 22 , Fe 77 B 23 , Fe 76 B 24 , Fe 75 B 25 and Co 80 B 20 .
References Cited (Backward Citations)
US3871836A
Cited
US3856513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |