POWDER FOR MAGNETIC MEMBER, POWDER COMPACT, AND MAGNETIC MEMBER

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 (JP)
WATANABE ASAKO (JP)

Application Number:

PCT/JP2011/060744

Publication Date:

November 24, 2011

Filing Date:

May 10, 2011

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)
MAEDA TORU (JP)
WATANABE ASAKO (JP)

International Classes:

B22F1/102; B22F3/24; C22C33/02; H01F1/053; H01F1/06; H01F1/08; B22F1/16

Foreign References:

JPH10106875A	1998-04-24
JP2003031432A	2003-01-31
JP2008172037A	2008-07-24
JP2011137218A	2011-07-14
JP2009123968A	2009-06-04
JP2004134552A	2004-04-30

Other References: