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

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

1981-02-05

1983-09-13

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148120, 148 3157, H01F 102

Patent

active

044040466

ABSTRACT:
There is provided a method of producing a manganese-aluminum-carbon alloy magnet, including the steps of preparing a polycrystalline Mn-Al-C alloy magnet having a specified direction of easy magnetization and subjecting the magnet to compressive working in that direction at a temperature of 550.degree. to 780.degree. C., the degree of said compressive working being equivalent to a logarithmic strain of .ltoreq.-0.1 and working in said step at least up to a logarithmic strain of -0.1 being free compression.

REFERENCES:
patent: 3266954 (1966-08-01), Hokkeling et al.
patent: 3944445 (1976-03-01), Ohtani et al.
patent: 4023991 (1977-05-01), Kubo et al.
patent: 4133703 (1979-01-01), Kojima et al.
A Dictionary of Metallurgy, A. D. Merriman, MacDonald and Evans Ltd., 1958, p. 97.

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