R.sub.2 Co.sub.17 Rare type-earth-cobalt, permanent magnet mater

Details R.sub.2 Co.sub.17 Rare type-earth-cobalt, permanent magnet mater R.sub.2 Co.sub.17 Rare type-earth-cobalt, permanent magnet mater

1977-02-08

1980-07-22

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

75170, 148 3157, H01F 108

Patent

active

042138035

ABSTRACT:
Disclosed is the addition of at least two elements of Nb, V, Ta and Zr to the ternary alloy of R (rare earth)-Co-Cu for permanent magnet materials, to thereby provide the permanent magnets with increased coercive force, residual magnetization and energy product. The additional elements enable employment of such Cu and Fe contents of the alloy as less than 10% and more than 6%, respectively. These percentages were avoided in the prior art to prevent the reduction of Br and Hc, respectively.

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patent: 4047982 (1977-09-01), Sagawa et al.
patent: 4075437 (1978-02-01), Chin et al.
patent: 4081297 (1978-03-01), Nogel et al.
Strnat, K. et al., Magnetic Properties of Rare Earth Iron Intermetallic Compounds, IEEE Transactions on Magnetics, pp. 489-493 (9/66).

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