Method of fabricating rare earth-transition metal magnets

Details Method of fabricating rare earth-transition metal magnets Method of fabricating rare earth-transition metal magnets

1978-02-03

1979-03-13

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

294205, 75200, 75211, 75214, 148101, 148105, B22F 314, B22F 316, H01F 108

Patent

active

041440609

ABSTRACT:
Self-supporting magnets, suitable for use as pole pieces of D.C. motors, are made from rare earth-transition metal powders which are pressed into thin, curved shapes and radially magnetically aligned. The compacts are restrained during sintering between special dies shaped to prevent them from warping without inhibiting circumferential or radial shrinkage.

REFERENCES:
patent: 2048222 (1936-07-01), Rehmann
patent: 3089189 (1963-05-01), Feldman et al.
patent: 3157718 (1964-11-01), O'Leary et al.
patent: 3706550 (1972-12-01), Umehara et al.
patent: 3719479 (1973-03-01), Flanagan
patent: 3802849 (1974-04-01), Kimura et al.
patent: 3864808 (1975-02-01), Doser
Palading et al., "Application of Hot Pressing in Fabricating Radial Polarized SmCo Magnets", IEEE Magazine, vol. 11, p. 1455 (1975).

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