Permanent magnent and method for producing same

Details Permanent magnent and method for producing same Permanent magnent and method for producing same

1985-12-27

1988-08-23

Sheehan, John P.

Metal treatment

Stock

Magnetic

420 83, 420121, 75244, H01F 104

Patent

active

047658487

ABSTRACT:
In the rare earth-iron-boron permanent magnet, Ce and La decrease the magnetic properties when used alone but synergistically enhance iHc when used in combination.
The composition provided by the present invention is generally expressed by [(Ce.sub.x La.sub.1-x).sub.y R.sub.1-y ].sub.z [(Fe.sub.1-u-w Co.sub.w M.sub.u).sub.1-v B.sub.v ].sub.1-z with a proviso of 0.4.ltoreq.x.ltoreq.0.9, 0.2<y.ltoreq.1.0, 0.05.ltoreq.z.ltoreq.0.3, 0.01.ltoreq.v.ltoreq.0.3, 0.ltoreq.u.ltoreq.0.2, 0.ltoreq.w.ltoreq.0.5, and M is at least one element selected from the group consisting of Al, Ti, V, Cr, Mn, Zr, Hf, Nb, Ta, Mo, Ge, Sb, Sn, Bi, Ni, W, Cu, and Ag.

REFERENCES:
patent: 4402770 (1983-09-01), Koon
patent: 4533408 (1985-08-01), Koon
patent: 4558077 (1985-12-01), Gray

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