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US4306908A
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Ferromagnetic amorphous alloy
Assignee: Hitachi Ltd
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Filing: 1980-09-19
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Granted: 1981-12-22
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Expires: 2000-09-19
Abstract
Abstract A ferromagnetic amorphous alloy having a composition represented by (CoxNiyFez)aMbGc, wherein M is Cr, Mo and/or W, G is Zr, Hf and/or Ti and x, y, z and a, b, c are selected to meet the conditions of x=1-y-z, 0</=y</=0.2, 0</=z</=0.7, a=1-b-c, 0</=b</=0.05 and 0.05</=c</=0.2 This amorphous alloy has a superior magnetic characteristic and a high thermal stability.
Inventors
- 👤 Shinji Takayama
- 👤 Yasuo Tsukuda
- 👤 Kazuo Shiiki
- 👤 Shigekazu Otomo
- 👤 Mitsuhiro Kudo
- 👤 Yasunobu Ogata
- 👤 Yoshizo Sawada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:17
CPC Classifications
C; C22; C22C; C22C45/00; C22C45/008; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15316
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
A ferromagnetic amorphous alloy having a composition expressed by (Co x Ni y Fe z ) a M b G c , wherein M is at least one transition metal element selected from the group consisting of Cr, Mo and W, G is at least one element selected from the group consisting of Zr, Hf and Ti and wherein x, y, z and a, b, c are selected to meet the conditions of: x=1-y-z, 0≦y≦0.2, 0≦z≦0.7, a=1-b-c, 0≦b≦0.05 and 0.05≦c≦0.2.
Claim 2
Dependent Claim
80 words
A ferromagnetic amorphous alloy having a composition expressed by (Co x Ni y Fe z ) a M b G c , wherein M is at least one transition metal element selected from the group consisting of Cr, Mo and W, G is at least one element selected from the group consisting of Zr, Hf and Ti and wherein x, y, z and a, b, c are selected to meet the conditions of: x=1-y-z, 0≦y≦0.2, 0≦z≦0.7, a=1-b-c, 0≦b≦0.05 and 0.05≦c≦0.2.
Claim 3
Dependent Claim
19 words
A ferromagnetic amorphous alloy as claimed in claim 1, wherein y, z and b meet the condition of y+z+b>0.
Claim 4
Dependent Claim
16 words
A ferromagnetic amorphous alloy as claimed in claim 1, wherein y meets the condition of 0<y≦0.2.
Claim 5
Dependent Claim
16 words
A ferromagnetic amorphous alloy as claimed in claim 1, wherein z meets the condition of 0<z≦0.7.
Claim 6
Dependent Claim
16 words
A ferromagnetic amorphous alloy as claimed in claim 1, wherein b meets the condition of 0<b≦0.05.
Claim 7
Dependent Claim
22 words
A ferromagnetic amorphous alloy as claimed in claim 1, wherein y, z and b meet the conditions of 0<y≦0.2, 0<z≦0.7 and 0<b<0.05.
Claim 8
Dependent Claim
22 words
A ferromagnetic amorphous alloy as claimed in claim 1, wherein z, b and c meet the conditions of z≈0, b≈0 and c≈0.1.
Claim 9
Dependent Claim
16 words
A ferromagnetic amorphous alloy as claimed in claim 7, wherein y meets the condition of y≈0.1.
Claim 10
Dependent Claim
25 words
A ferromagnetic amorphous alloy as claimed in claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the element represented by M is Cr.
Claim 11
Dependent Claim
25 words
A ferromagnetic amorphous alloy as claimed in claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein the element represented by G is Zr.
Claim 12
Dependent Claim
29 words
A ferromagnetic amorphous alloy as claimed in claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein elements represented by M and G are Cr and Zr, respectively.
References Cited (Backward Citations)
US3986867A
Cited
US4187128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |