PERMANENT MAGNET, METHOD FOR PRODUCING THE SAME, AND MOTOR AND GENERATOR USING THE SAME

Title:

PERMANENT MAGNET, METHOD FOR PRODUCING THE SAME, AND MOTOR AND GENERATOR USING THE SAME

Document Type and Number:

Japanese Patent JP2013072097

Kind Code:

A

Abstract:

To provide a permanent magnet which reproducibly exhibits high coercive force by a Sm-Co-based magnet including a composition region of high Fe concentration as the main phase.

In one embodiment, the permanent magnet includes: composition represented by compositional formula R_pFe_qM_rCu_sCo_100-p-q-r-s (R is at least one selected from rare earth elements, M is at least one selected from Zr, Ti and Hf, and 10≤p≤13.5, 28≤q≤40, 0.88≤r≤7.2, and 4≤s≤13.5 (atom%)); and a composition region having Fe concentration of 28 mol% or more as the main phase. Cu concentration in the main phase is 5 mol% or more.

Inventors:

HORIUCHI YOSUKE
SAKURADA SHINYA
KOBAYASHI TAKASHI
OKAMOTO YOSHIKO
HAGIWARA MASAYA

Application Number:

JP2011210123A

Publication Date:

April 22, 2013

Filing Date:

September 27, 2011

Export Citation:

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Assignee:

TOSHIBA CORP

International Classes:

C22C19/07; B22F1/00; B22F3/00; B22F3/02; B22F3/24; B22F9/04; B22F9/08; C22C1/04; C22C33/02; C22C38/00; C22F1/10; H01F1/055; H01F41/02; C22F1/00

Domestic Patent References:

JP2010121167A	2010-06-03
JPS648218A	1989-01-12
JPS63149362A	1988-06-22
JPS57161044A	1982-10-04
JPH06212327A	1994-08-02
JPS5866305A	1983-04-20
JPS60238463A	1985-11-27

Foreign References:

WO2011016089A1	2011-02-10
WO2010058555A1	2010-05-27

Attorney, Agent or Firm:

Patent Business Corporation Sakura International Patent Office

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