Rare earth metal-iron group metal target, alloy powder therefor

Details Rare earth metal-iron group metal target, alloy powder therefor Rare earth metal-iron group metal target, alloy powder therefor

1990-06-26

1992-03-24

Hunt, Brooks H.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Heat and pressure simultaneously to effect sintering

419 57, 419 60, 419 33, B22F 100

Patent

active

050986490

ABSTRACT:
A rare earth metal-iron group metal target for a magneto-optical disk is produced by mixing power (a) produced by the rapid quenching treatment of an alloy composed of at least one rare earth metal and at least one iron group metal in a composition range which permits the formation of an eutectic structure, with powder (b) from at least one iron group metal in an amount necessary for meeting the composition requirements of the target; and subjecting the resulting mixture to pressure sintering in vacuum or in an inert gas atmosphere at a temperature lower than a liquid phase-appearing temperature of the mixture to produce a rare earth metal-iron group metal intermetallic bonding layer betwen the particles.

REFERENCES:
patent: 3928089 (1975-12-01), Cech
patent: 4620872 (1986-11-01), Hijikata et al.
patent: 4824481 (1989-04-01), Chatterjee et al.
patent: 4957549 (1990-09-01), Matsumoto et al.
patent: 4992095 (1991-02-01), Nate et al.
"Mikkei New Materials", p. 61, Nov. 24, 1988.
Summary of lectures in 10th Academic Meeting of Japan Applied Magnetics Association, pp. 128-129, 1986.

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