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Title:
SINTER MAGNET MADE FROM RARE EARTH-IRON-BORON ALLOY POWDER FOR MAGNET
Document Type and Number:
WIPO Patent Application WO/2003/066922
Kind Code:
A1
Abstract:
A rare earth-iron-boron alloy powder in which heavy rare earth elements such as dysprosium are present in the main phase in a relatively higher concentration than in a grain boundary phase and which can be easily sintered; and a process for producing the powder. The rare earth-iron-boron alloy for magnets contains, as the main phase, R2Fe14B-form crystals having a rare-earth-rich phase dispersed therein (R is at least one element selected from the group consisting of rare earth elements and yttrium), the main phase containing dysprosium and/or terbium in a higher concentration than in the grain boundary phase.

Inventors:
Tomizawa, Hiroyuki (7-62-408, Ikagakitamachi Hirakata-shi, Osaka, 573-0036, JP)
Kaneko, Yuji (39-207, Kohata Okurayama Uji-shi, Kyoto, 611-0002, JP)
Odaka, Tomoori (1-10-16, Mitsukeyama Ibaraki-shi, Osaka, 567-0035, JP)
Application Number:
PCT/JP2003/001143
Publication Date:
August 14, 2003
Filing Date:
February 04, 2003
Export Citation:
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Assignee:
NEOMAX CO., LTD. (7-19, Kitahama 4-chome Chuo-k, Osaka-shi Osaka, 541-0041, JP)
Tomizawa, Hiroyuki (7-62-408, Ikagakitamachi Hirakata-shi, Osaka, 573-0036, JP)
Kaneko, Yuji (39-207, Kohata Okurayama Uji-shi, Kyoto, 611-0002, JP)
Odaka, Tomoori (1-10-16, Mitsukeyama Ibaraki-shi, Osaka, 567-0035, JP)
International Classes:
B22D11/06; B22F1/00; B22F9/04; C22C1/04; C22C19/07; C22C33/02; C22C38/00; C22C38/06; C22C38/10; C22C38/16; H01F1/053; H01F1/057; H01F1/06; H01F41/02; (IPC1-7): C22C38/00; C22C33/02
Attorney, Agent or Firm:
Okuda, Seiji (OKUDA & ASSOCIATES, 2nd Floor Kataoka Bldg., 3-6, Uchiawajimachi 1-chome, Chuo-k, Osaka-shi Osaka, 540-0038, JP)
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