Isotropic powdery magnet material, process for preparing and resin-boned magnet
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United States of America Patent
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Jul 6, 2004
Grant Date -
Feb 7, 2002
app pub date -
May 29, 2001
filing date -
May 29, 2000
priority date (Note) -
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Abstract
Disclosed is an isotropic SmFeN powdery magnet material for producing resin-bonded magnets. The magnet powder is prepared by melt-spinning of a molten alloy and nitriding the alloy powder thus obtained to form a magnet alloy having an alloy composition of one of the formulae, by atomic %: Sm.sub.x Fe.sub.100-x-v N.sub.v, Sm.sub.x Fe.sub.100-x-y-v M.sup.1.sub.y N.sub.v and Sm.sub.x Fe.sub.100-x-z-v M.sup.2.sub.z N.sub.v wherein M.sup.1 is at least one member selected from the group consisting of Hf and Zr; and M.sup.2 is at least one member selected from the group consisting of Si, Nb, Ti, Ga, Al, Ta and C; 7.ltoreq.x.ltoreq.12, 0.1.ltoreq.y.ltoreq.1.5, 0.1.ltoreq.z.ltoreq.1.0 and 0.5.ltoreq.v.ltoreq.20; the crystal structure is TbCu.sub.7 type; and the thickness of the flakes is 10-40 .mu.m.
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