Method of making permanent magnets of Mn-Al-C alloy

Details Method of making permanent magnets of Mn-Al-C alloy Method of making permanent magnets of Mn-Al-C alloy

1974-10-08

1976-03-16

Satterfield, Walter R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 3155, 148120, 75134M, H01F 100

Patent

active

039444457

ABSTRACT:
A method of making isotropic Mn-Al-C alloy magnets which comprises the step of subjecting an alloy comprising 71.0% to 73.0% by weight of manganese, (1/10 Mn -- 6.6)% to (1/3 Mn -- 22.2)% by weight of carbon and the remainder aluminum to plastic deformation at a temperature of 550.degree.C to 780.degree.C.
By utilizing this method, it is possible to obtain isotropic Mn-Al-C alloy magnets having excellent magnetic characteristics, i.e. (BH)max = 2.0 .times. 10.sup.6 G. Oe or more.

REFERENCES:
patent: 2797995 (1957-07-01), Morgan
patent: 3194654 (1965-07-01), Kaneko
patent: 3266954 (1966-08-01), Hokkeling et al.
patent: 3661567 (1972-05-01), Yamamoto

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