US3660175A
Expired / Lapsed
US
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Method of manufacturing a magnetically anisotropic magnet body
Assignee: US Philips Corp
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Filing: 1970-09-11
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Granted: 1972-05-02
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Expires: 1990-09-11
Abstract
Abstract A method of manufacturing anisotropic permanent magnets having a composition 28 - 42 percent Co, 10 - 20 percent Ni, 6 - 10 percent Al, 2 - 8 percent Cu, 4 - 10 percent Ti, remainder mainly Fe. The anisotropy is induced in the alloy, possibly together with the treatment in a magnetic field, by means of an elastic deformation of the alloy below the segregation temperature To. The result, at least when To is at least 25* C higher than Tc, is a higher energy product of the magnet than could be achieved so far.
Inventors
- 👤 Theodorus Henricus Carol Melis
- 👤 Pieter Aart Naastepad
- 👤 Krijn Jacobus De Vos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:16
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/10; C22C; C22C19/00; C22C19/07; C22C38/00; C22C38/10; C22C38/105; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
A method as claimed in claim 1, wherein the alloy is subjected to treatment in a magnetic field below the Curie temperature of Alpha '' phase.
Claim 2
Dependent Claim
23 words
A method as claimed in claim 1, the deformation takes place between temperature To and the Curie temperature of the Alpha '' phase.
Claim 3
Dependent Claim
36 words
A method as claimed in claim 1, wherein the alloy consists of oriented crystals and the deformation force is directed so that a tensile stress is formed in the body in the easy axis of magnetization.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |