Method of making permanent magnet containing rare earth metal an

Details Method of making permanent magnet containing rare earth metal an Method of making permanent magnet containing rare earth metal an

1990-07-11

1993-04-13

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148103, 148104, 419 12, 419 52, H01F 102

Patent

active

052019624

ABSTRACT:
A method of manufacturing a permanent magnet which comprises applying one directional pressure and an electric current to an aggregate through a pair of electrodes to cause the aggregate to undergo a plastic deformation thereby to expand an axially projected surface area. The aggregate used is of a type containing alloy flakes interlocked with each other. The alloy flakes are those made of at least one rare earth metal and a ferrous component by the use of a melt quenching process.

REFERENCES:
patent: 2355954 (1944-08-01), Gremer
patent: 4710239 (1987-12-01), Lee
patent: 4792367 (1988-12-01), Lee
patent: 4802931 (1989-02-01), Croat
patent: 4921551 (1990-05-01), Vernia et al.
patent: 5000796 (1991-03-01), Chatterjee

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