Magnetic powder, manufacturing method of magnetic powder and bonded magnets
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United States of America Patent
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Sep 30, 2003
Grant Date -
Oct 17, 2002
app pub date -
May 22, 2001
filing date -
May 22, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed herein is a magnetic powder which can provide magnets having excellent magnetic properties and having excellent reliability especially excellent heat stability. The magnetic powder is composed of an alloy composition represented by (R.sub.1-a Dy.sub.a).sub.x (Fe.sub.1-b Co.sub.b).sub.100-x-y B.sub.y (where R is at least one kind of rare-earth element, x is 7.1-9.9 at %, y is 4.6-8.0 at %, a is 0.02-0.2, and b is 0-0.30), wherein the magnetic powder is constituted from a composite structure having a soft magnetic phase and a hard magnetic phase, and the intrinsic coercive force (H.sub.CJ) of the magnetic powder at a room temperature is in the range of 400-750 kA/m.
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