Process for the production of an anisotropic magnetic material b

Details Process for the production of an anisotropic magnetic material b Process for the production of an anisotropic magnetic material b

1991-07-25

1992-08-11

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

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

Patent

active

051375885

ABSTRACT:
Magnet material of the Sm-Fe-N system having a crystalline, hard magentic phase with a Th.sub.2 Zn.sub.17 crystal structure, wherein N atoms are incorporated into the crystal lattice, is produced. First a preliminary product is formed by sintering a Sm-Fe powder which is oriented in a magnetic field to provide a sintered body having a two-component Sm-Fe phase. The sintered body is heat treated in a nitrogen atmosphere to form the Sm-Fe-N hard magnetic phase. The nitrogen atomosphere may advantageously be reactive nitrogen.

REFERENCES:
patent: 4837114 (1989-06-01), Hamada et al.
patent: 4902357 (1990-02-01), Imaizumi
J. Appl. Phys., vol. 64, 1988, pp. 5720-5722, "Magnetic Properties And Synthesis Of High iHc Sm-Ti-Fe", N. Kamprath et al.
Nato Advanced Study Institute . . . , Jun.-Jul. 1990, "Improved Magnetic Properties By Treatment Of Iron Based Rare Earth Intermetallic Compounds In Amonia", J. M. D. Coey et al.

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