Rare earth magnet alloy
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United States of America Patent
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May 21, 1991
Grant Date -
N/A
app pub date -
Dec 26, 1989
filing date -
Dec 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rare earth magnet alloy including, by weight, 8 to 20% of Sm, 6 to 20% of one or more of elements selected from the group consisting of Nd, Pr and Y, 10 to 25% of Fe, 5 to 10% of Cu, 0.1 to 1% of Ti, 1 to 4% of Zr, 0.1 to 1.0% of Mn, 0.003 to 0.015% of B, optional amount of Ce and the balance of Co, in which the total sum for the amount of Nd, Pr, Y and Ce and the amount of Sm is from 22 to 28%. P and/or S may be added instead of or together with B. The magnet alloy has the coercive force of greater than 10 KOe, the residual magnetic flux density of greater than 10.5 KG and the maximum energy product of about 28 MGOe.
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