Samarium-transition metal magnet formation

Details Samarium-transition metal magnet formation Samarium-transition metal magnet formation

1988-06-09

1991-04-16

Morris, Theodore

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148103, 148105, H01F 108

Patent

active

050079727

ABSTRACT:
A process for fabricating high strength Sm.sub.2 TM.sub.17 (TM=transition metal) magnets is disclosed. An alloy is crushed and pulverized to a very fine powder. The powder is aligned in a magnetic field, cold pressed to substantially immobilize the powder particles and then compacted by hot isostatic pressing. The material is either homogenized at this time or prior to crushing. Thereafter, the powder is optimized by an aging heat treatment which includes isothermal exposure followed by controlled cooling. When aging is complete, the compact is magnetized.

REFERENCES:
patent: 4322257 (1982-03-01), Menth et al.
patent: 4484957 (1985-11-01), Hiouchi et al.
patent: 4664723 (1987-05-01), Ishii et al.

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