Specialized metallurgical processes – compositions for use therei – Compositions – Loose particulate mixture containing metal particles
Patent
1990-06-26
1991-11-05
Stoll, Robert L.
Specialized metallurgical processes, compositions for use therei
Compositions
Loose particulate mixture containing metal particles
420416, B22F 100
Patent
active
050628852
ABSTRACT:
A rare earth metal-iron group metal target for a magneto-optical disk is produced by mixing powder (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 between the particles.
REFERENCES:
patent: 3928089 (1975-12-01), Cech
patent: 4620872 (1986-11-01), Hijikata et al.
patent: 4957549 (1990-09-01), Matsumoto 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.
Chiba Yoshitaka
Ichiyasu Rokuo
Inui Tsutomu
Matsumoto Shun-ichiro
Bhat N.
Hitachi Metals Ltd.
Stoll Robert L.
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