Fibrous anisotropic permanent magnet and production process ther

Details Fibrous anisotropic permanent magnet and production process ther Fibrous anisotropic permanent magnet and production process ther

1990-11-07

1992-08-04

Sheehan, John P.

Metal treatment

Stock

Magnetic

420 83, 420121, H01F 1053

Patent

active

051355850

ABSTRACT:
A fibrous anisotropic permanent magnet is disclosed comprising fibers composed of an alloy comprising at least one of a rare earth metal selected from Nd, Pr, Dy, Ho, Tb, La, and Ce; Fe or Fe and Co; and B, said fibers having a mean diameter of from 50 to 1,000 .mu.m and exhibiting magnetic anisotropy. The fibrous anisotropy permanent magnet is prepared by extruding a molten alloy comprising at least one of Nd, Pr, Dy, Ho, Tb, La, and Ce; Fe or Fe and Co; and B in an oil to quench-solidify the molten alloy into a fibrous form.
Since the fibrous magnet exhibits excellent anisotropic magnetic characteristics in the lengthwise direction of the fiber axis in the quench-solidified state, the magnet is particularly useful as a magnetic powder material for an anisotropic bond magnet.

REFERENCES:
patent: 4842656 (1989-06-01), Maines et al.
patent: 4844754 (1989-07-01), Lee
The American Heritage Dictionary of the English Language, 1976, p. 487.
Patent Abstracts of Japan, vol. 13, No. 304 (E-786)(3652) Jul. 12, 1989 & JP-62-239855 (Seiko Electronic Components Ltd.) Sept. 24, 1987.
Patent Abstracts of Japan, vol. 13, No. 462 (M-881)(3810) Oct. 19, 1989 & JP-01-180-757 (Toyoba Co., Ltd.) Jul. 18, 1989.
Patent Abstracts of Japan, vol. 13, No. 51 (E-712)(3399) Feb. 6, 1989 & JP-63-244-704 (Seiko Epson Corp.) Oct. 12, 1988.

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