Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1993-12-09
1995-09-05
Walsh, Donald P.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
75246, 428546, 428548, 419 48, B22F 700
Patent
active
054478014
ABSTRACT:
A target for magneto-optical recording media having a microstructure having a matrix phase of a eutectic structure of a rare earth metal and an iron-group metal, particles I made of a pure iron-group metal or an alloy thereof and having an average diameter of 200 .mu.m or less and particles II made of a corrosion resistance-improving metal and an iron-group metal and having an average diameter of 200 .mu.m or less is produced by mixing rapidly-quenched powder A made of the rare earth metal and the iron-group metal and having a eutectic structure with powder B made of a pure iron-group metal or an alloy thereof and having an average diameter of 200 .mu.m or less, and powder C made of the corrosion resistance-improving metal and the iron-group metal and having an average diameter of 200 .mu.m or less, and pressure-sintering the resulting mixed powder at a temperature lower than a liquid phase-appearing temperature.
REFERENCES:
patent: 4957549 (1990-09-01), Matsumoto
patent: 4992095 (1991-02-01), Nate et al.
patent: 5062885 (1991-11-01), Matsumoto
patent: 5098529 (1992-03-01), Feldhues
I.E.E.E. Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, New York, pp. 2443-2445, T. Nate, T. Morimoto, S. Endoh, K. Oka, "Preparation of the Alloy Target for Magneto-Optical Recording Media".
Masuda Kaoru
Matsumoto Shun-ichiro
Greaves John N.
Hitachi Metals Ltd.
Walsh Donald P.
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