Title:
PRODUCTION METHOD FOR R-T-B-BASED SINTERED MAGNET
Document Type and Number:
WIPO Patent Application WO/2016/093174
Kind Code:
A1
Abstract:
The present invention includes a step in which heat treatment is performed at no more than the sintering temperature for an R-T-B-based sintered magnet, said heat treatment being performed in a state in which an RLM alloy powder (RL being Nd and/or Pr and M being at least one type of element selected from Cu, Fe, Ga, Co, Ni, and Al) and an RH oxide powder (RH being Dy and/or Tb) are present on the surface of the R-T-B-based sintered magnet. The RLM alloy includes at least 50 at.% RL and the melting point of the RLM alloy is no more than the heat treatment temperature. The heat treatment occurs in a state in which the RLM alloy powder and the RH oxide powder are present on the surface of the R-T-B-based sintered magnet at a mass ratio of RLM alloy:RH oxide = 9.6:0.4-5:5.
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Inventors:
MINO SHUJI
Application Number:
PCT/JP2015/084176
Publication Date:
June 16, 2016
Filing Date:
December 04, 2015
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
H01F41/02; B22F3/24; C22C33/02; H01F1/057; H01F1/08; B22F3/00; C22C38/00
Domestic Patent References:
| WO2006112403A1 | 2006-10-26 |
Foreign References:
| JP2009302119A | 2009-12-24 | |||
| JP2010186857A | 2010-08-26 |
Attorney, Agent or Firm:
OKUDA SEIJI (JP)
Seiji Okuda (JP)
Seiji Okuda (JP)
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