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US4834815A
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Iron-based amorphous alloys containing cobalt
Assignee: Honeywell International Inc
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Filing: 1987-10-15
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Granted: 1989-05-30
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Expires: 2007-10-15
Abstract
Abstract Metallic alloys are disclosed which are at least about 90% amorphous, having enhanced magnetic properties and consist essentially of a composition represented by the formula Fe a-b Co b B c Si d C e , wherein "a", "b", "c", "d" and "e" are atomic percentages ranging from about 75 to about 85, about 0.1 to about 0.8, about 12 to about 15, about 2 to about 5 and about 1 to about 3, respectively. Magnetic cores comprising such alloys, including cores having been subjected to a field anneal, are also disclosed.
Inventors
- 👤 Howard H. Lieberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:49
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/10; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15308; C22C38/02; C22C45/00; C22C45/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
59 words
A metallic alloy consisting essentially of a composition represented by the formula Fe.sub.a-b Co.sub.b B.sub.c Si.sub.d C.sub.e plus incidental impurities, wherein "a", "b", "c", "d" and "e" are atomic percentages ranging from about 75 to about 85, about 0.1 to about 0.8, about 12 to about 15, about 2 to about 5 and about 1 to about 3, respectively.
Claim 2
Dependent Claim
59 words
A metallic alloy consisting essentially of a composition represented by the formula Fe.sub.a-b Co.sub.b B.sub.c Si.sub.d C.sub.e plus incidental impurities, wherein "a", "b", "c", "d" and "e" are atomic percentages ranging from about 75 to about 85, about 0.1 to about 0.8, about 12 to about 15, about 2 to about 5 and about 1 to about 3, respectively.
Claim 3
Dependent Claim
13 words
The metallic alloy of claim 1 wherein "a-b" is at least about 79.5.
Claim 4
Dependent Claim
11 words
The metallic alloy of claim 1 wherein "a-b" is about 80.5.
Claim 5
Dependent Claim
14 words
The alloy of claim 2 wherein "b" is between about 0.4 and about 0.6.
Claim 6
Dependent Claim
10 words
The alloy of claim 3 wherein "b" is about 0.5.
Claim 7
Dependent Claim
10 words
The alloy of claims 5 wherein "c" is about 13.5.
Claim 8
Dependent Claim
10 words
The alloy of claim 6 wherein "d" is about 3.5.
Claim 9
Dependent Claim
10 words
The alloy of claim 7 wherein "e" is about 2.
Claim 10
Dependent Claim
14 words
The alloy of claim 1 wherein the alloy is at least about 90% amorphous.
Claim 11
Dependent Claim
12 words
The alloy of claim 1 wherein the alloy is substantially entirely amorphous.
Claim 12
Dependent Claim
91 words
A metallic alloy which is at least about 90% amorphous consisting essentially of a composition represented by the formula: Fe.sub.a-b Co.sub.b B.sub.c Si.sub.d C.sub.e plus incidental impurities, wherein "a", "b", "c", "d" and "e" are atomic percentages ranging from about 75 to about 85, about 0.1 to about 0.8, about 12 to about 15, about 2 to about 5 and about 1 to about 3, respectively, said alloy having a saturation induction of at least about 1.5 tesla over a temperature range of from about 0° C. to about 100° C.
Claim 13
Dependent Claim
91 words
A metallic alloy which is at least about 90% amorphous consisting essentially of a composition represented by the formula: Fe.sub.a-b Co.sub.b B.sub.c Si.sub.d C.sub.e plus incidental impurities, wherein "a", "b", "c", "d" and "e" are atomic percentages ranging from about 75 to about 85, about 0.1 to about 0.8, about 12 to about 15, about 2 to about 5 and about 1 to about 3, respectively, said alloy having a saturation induction of at least about 1.5 tesla over a temperature range of from about 0° C. to about 100° C.
Claim 14
Dependent Claim
76 words
A magnetic core composed of a body of metallic alloy which is at least about 90% amorphous, said alloy consisting essentailly of a composition represented by the formula: Fe.sub.a-b Co.sub.b B.sub.c Si.sub.d C.sub.e plus incidental impurities, wherein wherein "a", "b", "c", "d" and "e" are atomic percentages ranging from about 75 to about 85, about 0.1 to about 0.8, about 12 to about 15, about 2 to about 5 and about 1 to about 3, respectively.
Claim 15
Dependent Claim
76 words
A magnetic core composed of a body of metallic alloy which is at least about 90% amorphous, said alloy consisting essentailly of a composition represented by the formula: Fe.sub.a-b Co.sub.b B.sub.c Si.sub.d C.sub.e plus incidental impurities, wherein wherein "a", "b", "c", "d" and "e" are atomic percentages ranging from about 75 to about 85, about 0.1 to about 0.8, about 12 to about 15, about 2 to about 5 and about 1 to about 3, respectively.
Claim 16
Dependent Claim
38 words
The magnetic core of claim 12 wherein the core losses do not exceed about 0.2 watts per kilogram at an induction of 1.3 tesla over a range of temperatures of from about -40° C. to about +150° C.
Claim 17
Dependent Claim
28 words
The magnetic core of claim 13 wherein the existing power requirements do not exceed about 0.3 volt-amperes per kilogram at induction levels of up to about 1.5 tesla.
References Cited (Backward Citations)
US4226619A
Cited
JPH06183454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |