Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1986-08-18
1987-12-01
Sheehan, John P.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148104, 419 12, H01F 102
Patent
active
047102390
ABSTRACT:
In accordance with a preferred embodiment, an arcuate magnet is formed by selectively hot working a composition including iron, neodymium and/or praseodymium, and boron such that an edge of the arcuate has greater apparent coercivity than a central region and the central region has a higher remanence than the edge.
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Croat et al., "High-Energy Product Nd-Fe-B Permanent Magnets", Appl. Phys. Lett., 44(1), Jan. 1, 1984, pp. 148-149.
Hadjipanayis et al., "New Iron-Race-Earth Based Permanent Magnet Materials", Appl. Phys. Lett., 43(8), Oct. 15, 1983, pp. 797-799.
Kabacuff et al., "Thermal and Magnetic Properties of Amorphous Pr.sub.x (Fe.sub.0.8 B.sub.0.2).sub.1-x ", J. of Applied Phys., 53(3), Mar. 1982, pp. 2255-2257.
Stadelmaier et al., "Cobalt-Free and Samarium-Free Permanent Magnets Materials, Based on an Iron-Rare Earth Boride; Mat. Lett., vol. 2, No. 2, Oct. 1983, pp. 169-172.
Lee Robert W.
Schaffel Neal A.
General Motors Corporation
Grove George A.
Sheehan John P.
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