Nd-Fe-B system permanent magnet

Details Nd-Fe-B system permanent magnet Nd-Fe-B system permanent magnet

1994-01-28

1995-12-05

Sheehan, John

Metal treatment

Stock

Magnetic

420 83, 420121, 75244, H01F 1057

Patent

active

054725259

ABSTRACT:
Disclosed is a Nd-Fe-B system magnet having coercive force iHc of 12 KOe or more and high maximum energy product (BH)max of 42 MGOe or more.
The permanent magnet consists of 28 to 32 wt. % of Nd and Dy (Dy ranges from 0.4 to 3 wt. %), 6 wt. % or less of Co, 0.5 wt. % or less of Al, 0.9 to 1.3 wt. % of B, at least one of 0.05 to 2.0 wt. % of Nb and 0.05 to 2.0 wt. % of V, 0.02 to 0.5 wt. % of Ga, Fe and unavoidable impurities, having coercive force iHc of 12 KOe or more and maximum energy product (BH)max of 42 MGOe or more.

REFERENCES:
patent: 4859254 (1989-08-01), Mizoguchi et al.
patent: 4935075 (1990-06-01), Mizoguchi et al.
patent: 5223047 (1993-06-01), Endoh et al.
patent: 5230751 (1993-07-01), Endoh et al.

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