Title:
PRODUCTION OF ALLOY TARGET
Document Type and Number:
Japanese Patent JPH01149959
Kind Code:
A
Abstract:
PURPOSE:To produce the subject alloy target for the high-toughness magneto- optical recording medium of uniform structure by absorbing hydrogen in an alloy ingot obtained by melting a rare-earth metal and a transition metal to pulverize the alloy ingot, sintering, and compacting the obtained alloy powder. CONSTITUTION:One or more kinds of rare-earth metals among, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Tm and >=1 kind between Fe and Co are mixed to obtain an alloy ingot. The content of the rare-earth metal in the alloy is appropriately controlled to 20-60wt.%. Hydrogen is absorbed in the alloy ingot at least once, or hydrogen is absorbed and discharged to disintegrate and pulverize the alloy. The obtained alloy powder is heated at 100-700 deg.C preferably in vacuum or in an inert gas, thereby dehydrogenated, and then compacted by the sintering method such as hot pressing. By this method, a sputtering alloy target appropriate for obtaining a magneto-optical recording medium having a uniform internal structure, capable of being enlarged into an optional shape, low in oxygen, rich in toughness, and excellent in the charac teristic is obtained.
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Inventors:
YOSHIURA YOZO
YUKIKAWA YUU
KIMURA HIROSHI
FUKUMOTO HIROTOSHI
HARADA TETSUJI
YUKIKAWA YUU
KIMURA HIROSHI
FUKUMOTO HIROTOSHI
HARADA TETSUJI
Application Number:
JP30864987A
Publication Date:
June 13, 1989
Filing Date:
December 08, 1987
Export Citation:
Assignee:
MITSUI MINING & SMELTING CO
International Classes:
B22F9/04; C22C1/04; C23C14/34; (IPC1-7): B22F9/04; C22C1/04; C23C14/34
Attorney, Agent or Firm:
Tatsuo Ito (1 outside)