US5976274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft magnetic amorphous alloy and high hardness amorphous alloy and high hardness tool using the same
Assignee: Alps Alpine Co Ltd
•
Filing: 1998-01-22
•
Granted: 1999-11-02
•
Expires: 2018-01-22
Abstract
Abstract The present invention provides an amorphous alloy containing at least one element of Fe, Co, and Ni as a main component, at least one element of Zr, Nb, Ta, Hf, Mo, Ti and V, and B, wherein the temperature width ΔTx of a supercooled liquid region expressed by the equation ΔTx=Tx-Tg (wherein Tx indicates the crystallization temperature, and Tg indicates the glass transition temperature) is 20° C. or more. The amorphous alloy has excellent soft magnetic properties and high hardness, and can suitably be used for a transformer, a magnetic head, a tool, etc.
Inventors
- 👤 Akihisa Inoue
- 👤 Tao Zhang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:03
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/003; C22C45/00; C22C45/02; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15308; G; G11; G11B; G11B5/00; G11B5/127; G11B5/147
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A Co-based amorphous soft magnetic alloy expressed by the following formula: Co.sub.100-x-y-z-w T.sub.x M.sub.y M'.sub.z B.sub.w wherein T is one or both of Fe an Ni, M is at least one of Zr, Nb, Ta, Hf and Mo, M' is at least of W, Cr, Mn, Ru, Rh, Pd, Os, Ir, Pt, Al, Ga, Ge, C and P, wherein 0≦x≦20 (atomic %), 5≦y≦15 (atomic %), 0≦z≦10 (atomic %) and 15≦w≦22 (atomic %), wherein the temperature width ΔTx of a supercooled liquid region expressed by the equation ΔTx=Tx-Tg (wherein Tx is the crystallization start temperature, and Tg is the glass transition point) is 20° C. or more.
Claim 2
Dependent Claim
106 words
A Co-based amorphous soft magnetic alloy expressed by the following formula: Co.sub.100-x-y-z-w T.sub.x M.sub.y M'.sub.z B.sub.w wherein T is one or both of Fe an Ni, M is at least one of Zr, Nb, Ta, Hf and Mo, M' is at least of W, Cr, Mn, Ru, Rh, Pd, Os, Ir, Pt, Al, Ga, Ge, C and P, wherein 0≦x≦20 (atomic %), 5≦y≦15 (atomic %), 0≦z≦10 (atomic %) and 15≦w≦22 (atomic %), wherein the temperature width ΔTx of a supercooled liquid region expressed by the equation ΔTx=Tx-Tg (wherein Tx is the crystallization start temperature, and Tg is the glass transition point) is 20° C. or more.
Claim 3
Dependent Claim
20 words
A Co-based amorphous soft magnetic alloy according to claim 1 having a glass transition point Tg, wherein 8≦x≦20 (atomic %).
Claim 4
Dependent Claim
25 words
A Co-based amorphous soft magnetic alloy according to claim 1, wherein 8≦x≦20 (atomic %), and the absolute value of magnetostriction is 1×10 -6 or less.
References Cited (Backward Citations)
US4859256A
Cited
US5738733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-01 | 2003-05-03 | 2003-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-01 | 2007-05-03 | 2007-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-01 | 2011-05-03 | 2011-11-02 | $7700.00 | Window Closed / Lapsed |