Isotropic and nearly isotropic permanent magnet alloys

Details Isotropic and nearly isotropic permanent magnet alloys Isotropic and nearly isotropic permanent magnet alloys

H - Electricity

01

F

75/14, 317/29.8

H01F 1/04 (2006.01) C22C 38/12 (2006.01)

Patent

CA 1172472

- 13 - ISOTROPIC AND NEARLY ISOTROPIC PERMANENT MAGNET ALLOYS Abstract To provide for an inexpensive magnet alloy, isotropic and nearly isotropic permanent magnet properties are developed in Fe-Mo-Ni alloys. Manufacture may be by a method which comprises steps of annealing, optional deforming by a limited amount, and aging. Typical magnetic properties of alloys of the invention are a coercive force in the range of 50- 500 oersted, a magnetic remanence in the range of 7000- 14000 gauss, and a magnetic squareness ratio of less than 0.9. Alloys of the invention are highly ductile even after plastic deformation, they are readily bonded to aluminum supports (as used, e.g., in the manufacture of twistor memories), and they are readily etched by etchants which leave aluminum unaffected.

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