Directionally solidified ductile magnetic alloy

Details Directionally solidified ductile magnetic alloy Directionally solidified ductile magnetic alloy

1979-04-12

1981-07-21

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 3157, C04B 3500, H01F 104

Patent

active

042796687

ABSTRACT:
Magnetic alloys of a ternary composition as defined within the region A, B, C, D of the ternary diagram of FIG. 5, wherein X is one or more metals selected from the group which consists of iron, nickel, aluminum, copper, molybdenum and manganese and preferably includes 0.1 to 10% atomic (most advantageously 1 to 5% atomic chromium of the entire alloy), are cast and rendered ductile by the formation within the material during solidification of at least two phases. One of the phases is preferably ductile and formed essentially of fibers or dendrites of Co and the other phase or phases are from those normally found in rare-earth/cobalt magnets. The alloy is magnetically hardened by precipitation hardening. The chromium appears predominantly in the fiber or dendrite phase and promotes the formation of the latter.

REFERENCES:
patent: 3982971 (1976-09-01), Yamanaka et al.
patent: 4081297 (1978-03-01), Nagel et al.
patent: 4082582 (1978-04-01), Menth et al.
patent: 4099995 (1978-07-01), Menth et al.
patent: 4116726 (1978-09-01), Menth et al.
patent: 4135953 (1979-01-01), Nagel et al.
Chin et al., IEEE Trans. Magnetics, Mar. 1972, pp. 29-35.
Senno et al., Japan J. Appl. Phys. 14 (1975), p. 1619.

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