Title:
RARE EARTH PERMANENT MAGNET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2016/162990
Kind Code:
A1
Abstract:
When a non-equilibrium ThMn12-type intermetallic compound formed by rapid quenching is converted into a magnet, no low melting liquid phase is formed so that there is a problem in densification.
In the present invention, a liquid phase with a melting point of about 820°C can be formed by adding a trace amount of Cu to a quaternary system comprising Sm-Y-Fe-Co as main components and thus densification can be promoted in the process of producing a bulk magnet.
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Inventors:
SUZUKI HIROYUKI (JP)
Application Number:
PCT/JP2015/061039
Publication Date:
October 13, 2016
Filing Date:
April 08, 2015
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01F1/055; B22D11/06; B22F3/14; B22F9/04; C22C38/00; H01F1/08; H01F41/02
Foreign References:
| JPH02294447A | 1990-12-05 | |||
| JP2003193208A | 2003-07-09 | |||
| JPH0774011A | 1995-03-17 | |||
| JP2014047366A | 2014-03-17 | |||
| JP2001189206A | 2001-07-10 |
Attorney, Agent or Firm:
SEIRYO I. P. C. (JP)
青稜 patent business corporation (JP)
青稜 patent business corporation (JP)
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