Process for the production of shaped body from an anisotropic ma

Details Process for the production of shaped body from an anisotropic ma Process for the production of shaped body from an anisotropic ma

1991-07-25

1992-08-11

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148103, 148104, 419 13, 419 29, 419 53, H01F 102

Patent

active

051375877

ABSTRACT:
A shaped body of anisotropic magnetic material based on the Sm-Fe-N system which has a crystalline, hard magnetic phase with a Th.sub.2 Zn.sub.17 crystal structure, wherein N atoms are incorporated in the crystal lattice, is produced by compacting a powder Sm-Fe preliminary product with an Sm-Fe phase having a magnetically isotropic structure, followed by hot-shaping to provide an intermediate product with a Sm-Fe phase having a magnetically anisotropic structure, followed by heat treating the intermediate product in a nitrogen atmosphere to provide a Sm-Fe-N hard magnetic phase.

REFERENCES:
patent: 4837114 (1989-06-01), Hamada et al.
patent: 4902357 (1990-02-01), Imaizumi
J. Appl. Phys., vol. 64, No. 10, 1988, pp. 5720-5722, "Magnetic Properties and Synthesis of High iHc Sm-Ti-Fe", N. Kamprath et al.
Nato Advance Study Institue . . . , 1990, "Improved Magnetic Properties by Treatment of Iron Based Intermetallic Compounds in Ammonia", J. M. D. Coey et al.

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