Metal treatment – Stock – Magnetic
Patent
1986-03-17
1989-07-04
Sheehan, John P.
Metal treatment
Stock
Magnetic
420 83, 420121, 75229, 75244, H01F 104
Patent
active
048447544
ABSTRACT:
High energy product, magnetically anisotropic permanent magnets are produced by hot working overquenched or fine grained, melt-spun materials comprising iron, neodymium and/or praseodymium, and boron to produce a fully densified, fine grained body that has undergone plastic flow.
REFERENCES:
patent: 4023991 (1917-05-01), Kubo et al.
patent: 4402770 (1983-09-01), Koon
Sagawa et al, "New Material for Permanent Magnets on a Base of Nd and Fe", J. Appl. Phys. 55 (6), Mar. 15, 1984, pp. 2083-2086, Paper given Nov. 8-11, 1983.
Kabacoff et al, "Thermal and Magnetic Properties of Amorphous Pr.sub.x (Fe.sub.0.8 B.sub.0.2).sub.1-x ", J. Appl. Phys. 53 (3), Mar. 1982 pp. 2255-2257, Paper given at Conference Nov. 10-13, 1981.
Hadjipanazis et al, "Investigation of Crystalline Iron-Platinum Nickel and Amorphous Rare Earth-Iron Alloy for Permanent Magnets", Office of Naval Research, Dept. of Navy, Contract No. N00014-81-C-0752, Mar. 15, 1983.
Becker, "Surface Effects on Hystersis Loop Shapes in High Coercive Force Crystallized Amorphous Alloys," IEEE Trans. Magnetics Mag. 18, No. 6, Nov. 1982, pp.1452-1453.
Koon et al, "Composition Dependence of Coercive Force and Microstructure of Crystallized Amorphous (Fe.sub.x B.sub.1-x).sub.0.9 Tb.sub.0.05 La.sub.0.5 Alloy," IEEE Trans. Mag. Nov. 1982, p. 1448.
General Motors Corporation
Grove George A.
Sheehan John P.
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