Magnetic powder, permanent magnet produced therefrom and process

Details Magnetic powder, permanent magnet produced therefrom and process Magnetic powder, permanent magnet produced therefrom and process

1994-09-08

1997-07-15

Sheehan, John

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

148301, 148302, B22F 100

Patent

active

056478860

ABSTRACT:
A magnetic powder and a permanent magnet are provided which have magnetic properties enhanced by magnetic interaction. Disclosed are a magnetic powder comprising a mixture of two or more powders including a magnetic powder A (residual magnetic flux density: BrA, coercive force: HcA) and a magnetic powder B (residual magnetic flux density: BrB, coercive force: HcB) of which the residual magnetic flux densities and the coercive forces have the following relationships: BrA>BrB and HcA<HcB, and a bonded magnet or a sintered magnet produced from the magnetic powder, and a method for mixing magnetic powders and a process for producing a magnet.

REFERENCES:
patent: 4601754 (1986-07-01), Ghandehari et al.
patent: 5281250 (1994-01-01), Hamamura et al.
"Partial Substitution of Sm With Neodymium in RE.sub.2 (TM).sub.17 Resin Bonded Magnets," Journal of The Magnetics Society of Japan, vol. 11, No. 2, pp. 243-246, 1987.
"Partial Substitution of Sm With Praseodymium in R.sub.2 (TM).sub.17 Resin Bonded Magnets," Journal of Japan Society of Powder and Powder Metallurgy, vol. 35, No. 7, pp. 584-588.
R. Skomski et al., "Giant Energy Product in Nanostructured Two-Phase Magnets," Physical Review B: Condensed Matter, vol. 48, No. 21, Dec. 1993, pp. 15812-15816.

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