Forming curved thin magnets from rare earth-transition metal pow

Details Forming curved thin magnets from rare earth-transition metal pow Forming curved thin magnets from rare earth-transition metal pow

1977-08-01

1978-10-31

Andrews, M. J.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

29608, 264 24, 335302, H01F 702

Patent

active

041232976

ABSTRACT:
In a preferred embodiment, thin curved rare earth-transition metal (RE-TM) compacts with good green strength are made by a stepwise process in the molding cavities of a portable compacting tooling. The powder is partially compacted and magnetically aligned in a first press equipped with magnetizing means. It is then transported in the tooling, which protects the powder from being disturbed during the transportation, to a second press where it is further compacted under much higher loads. The compacts thus formed can be further processed to form thin, curved, densified, permanent rare earth-cobalt magnets particularly suited for use as pole pieces in small, high-torque D.C. motors.

REFERENCES:
patent: 3663317 (1972-05-01), Westendorp et al.
patent: 4010434 (1977-03-01), Kools

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