Fine grained anisotropic powder from melt-spun ribbons

Details Fine grained anisotropic powder from melt-spun ribbons Fine grained anisotropic powder from melt-spun ribbons

1992-06-22

1994-05-24

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148105, 148122, H01F 102

Patent

active

053145488

ABSTRACT:
A method is disclosed for producing a rapidly solidified, fine grained, magnetically anisotropic powder of the RE-Fe-B type. The rapidly solidified material is optimally quenched or slightly overquenched and is subjected to a hydrogen absorption-hydrogen desorption process that produces a fine grained material containing the essential magnetic phase RE.sub.2 TM.sub.14 B and an intergranular phase and is magnetically anisotropic.

REFERENCES:
patent: 4802931 (1989-02-01), Croat
patent: 4842656 (1989-06-01), Maines et al.
patent: 4851058 (1989-07-01), Croat
patent: 4981532 (1991-01-01), Takeshita et al.
patent: 5056585 (1991-10-01), Croat
patent: 5110374 (1992-05-01), Takeshita et al.
Patent Abstracts of Japan, vol. 13, No. 359 (E-804), Aug. 10, 1989.
Doser et al., "Pulverizing Anistropic Rapidly Solidified Nd-Fe-B Materials for Bonded Magnets," Journal of Applied Physics, vol. 70, No. 10, Nov. 15, 1991, pp. 6603-6605.

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