Rare earth magnet alloy

Details Rare earth magnet alloy Rare earth magnet alloy

1989-12-26

1991-05-21

Sheehan, John P.

Metal treatment

Stock

Magnetic

420 83, 420121, H01F 1053

Patent

active

050172476

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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