Magnetic material and manufacturing method thereof, and bonded magnet using the same
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United States of America Patent
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Sep 18, 2001
Grant Date -
N/A
app pub date -
Mar 26, 1999
filing date -
Mar 27, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A magnetic material has a composition expressed by the following general formula, general formula: {(R.sup.1.sub.X R.sup.2.sub.1-X).sub.Y B.sub.Z T.sub.1-Y-Z }.sub.1-Q N.sub.Q (where, R.sup.1 is at least one kind of element selected from rare earth elements, R.sup.2 is at least one kind of element selected from Zr, Hf, Ti and Sc, T is at least one kind of element selected from Fe and Co, and X, Y, Z and Q designate numerical values satisfying 0.5.ltoreq.X<1, 0.05.ltoreq.Y.ltoreq.0.2, 0.ltoreq.Z.ltoreq.0.1 and 0.1.ltoreq.Q.ltoreq.0.2), and includes 5 volume % or more of a Th.sub.2 Ni.sub.17 crystal phase. The magnetic material has a recrystallization texture of which average grain diameter is in the range of from 0.02 to 50 .mu.m, and is excellent in magnetic property. Such a magnetic material is obtained by giving a HDDR treatment to a mother alloy of which principal phase is a Th.sub.2 Ni.sub.17 crystal phase.
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