Title:
POWDER FOR MAGNETIC MEMBER, POWDER COMPACT, AND MAGNETIC MEMBER
Document Type and Number:
WIPO Patent Application WO/2011/145477
Kind Code:
A1
Abstract:
Disclosed are: a powder for a magnetic member, which has excellent moldability and is not easily oxidized; a powder compact which is obtained from the powder; and a magnetic member which is suitable as a material for a magnetic body such as a rare earth magnet.
Specifically, each magnetic particle (1) that constitutes the powder for a magnetic material is composed of less than 40% by volume of a hydrogen compound (3) of a rare earth element and the balance made up of an iron-containing substance (2) that contains iron and an iron-boron alloy containing iron and boron. Phases of the hydrogen compound (3) of a rare earth element are dispersed in a phase of the iron-containing substance (2). The surface of each magnetic particle (1) is provided with an oxidation preventing layer (4) that has low oxygen permeability coefficient. Since the phases of the iron-containing substance (2) are uniformly present in each magnetic particle (1), the powder has excellent moldability and the density of a powder compact can be easily increased. Since each magnetic particle (1) comprises an oxidation preventing layer (4), a newly formed surface that is formed on each magnetic particle (1) during the molding is not easily oxidized and thus deterioration of the magnetic phase due to the presence of an oxide can be suppressed.
Inventors:
MAEDA, Toru (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
前田 徹 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
前田 徹 (〒16 兵庫県伊丹市昆陽北一丁目１番１号 住友電気工業株式会社伊丹製作所内 Hyogo, 〒6640016, JP)
Application Number:
JP2011/060744
Publication Date:
November 24, 2011
Filing Date:
May 10, 2011
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES, LTD. (5-33, Kitahama 4-chome Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
住友電気工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 〒5410041, JP)
MAEDA, Toru (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
住友電気工業株式会社 (〒41 大阪府大阪市中央区北浜四丁目５番３３号 Osaka, 〒5410041, JP)
MAEDA, Toru (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
International Classes:
B22F1/02; B22F1/00; B22F3/24; C22C33/02; H01F1/053; H01F1/06; H01F1/08
Attorney, Agent or Firm:
YAMANO, Hiroshi (KEIMEI PATENT OFFICE, 10F ASTRO Shin Osaka 2 Bldg., 1-3, Nishinakajima 6-chome, Yodogawa-ku, Osaka-sh, Osaka 11, 〒5320011, JP)
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Claims: