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Patent Searching and Data


Title:
PERMANENT MAGNET
Document Type and Number:
WIPO Patent Application WO/2018/235856
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a low-cost permanent magnet which has higher magnet characteristics than conventional ordered alloy-based permanent magnets, while containing no rare earth element as a constituent element. A permanent magnet according to the present invention contains no rare earth element, and is characterized by containing an FeNi ordered phase in which a third element is diffused. This permanent magnet is also characterized in that: the third element is C, N or Co; and the concentration of the third element decreases from the surface of the permanent magnet toward the inner side thereof and/or the concentration of the third element decreases from the surfaces of crystal grains of the FeNi ordered phase toward the inner sides thereof.

Inventors:
KOMURO Matahiro (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
NOUJIMA Masafumi (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2018/023430
Publication Date:
December 27, 2018
Filing Date:
June 20, 2018
Export Citation:
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Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
International Classes:
H01F1/047; C22C19/03; C22C38/00; C23C8/62; C23C8/66; C23C10/36
Domestic Patent References:
WO2016036856A12016-03-10
WO2016171232A12016-10-27
Foreign References:
JP2017075388A2017-04-20
JP2014105376A2014-06-09
Attorney, Agent or Firm:
POLAIRE I.P.C. (13-11, Nihonbashikayabacho 2-chome Chuo-k, Tokyo 25, 〒1030025, JP)
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