Title:
希土類磁石の製造方法
Document Type and Number:
Japanese Patent JP6813443
Kind Code:
B2
Abstract:
To provide a method of producing an Sm-Fe-N based rare earth magnet in which excellent coercive force and residual magnetization can be obtained even if sintered at a relatively low pressure.SOLUTION: A method of producing a rare earth magnet includes the steps of: obtaining mixed powder by mixing the magnetic material raw material powder containing Sm, Fe, and N, and the modifying material powder containing at least one of metal Zn and Zn alloy; obtaining a pressurized powder body by performing compression molding on the mixed powder; obtaining a sintered body by performing pressure sintering on the pressurized powder body at a temperature of 300 to 400°C and a pressure of 0.80 to 1.80 GPa; and performing heat treatment on the sintered body at a temperature of 425 to 500°C.SELECTED DRAWING: Figure 1
Inventors:
Sakuma Koji
Tetsuya Shoji
Satoru Nakajima
Satoshi Sugimoto
Matsuura Masashi
Tetsuya Shoji
Satoru Nakajima
Satoshi Sugimoto
Matsuura Masashi
Application Number:
JP2017129671A
Publication Date:
January 13, 2021
Filing Date:
June 30, 2017
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
Tohoku University
Tohoku University
International Classes:
H01F41/02; B22F1/00; B22F3/00; B22F3/02; C22C13/00; C22C18/00; C22C18/04; C22C23/04; C22C33/02; H01F1/059
Domestic Patent References:
| JP2015199096A1 | ||||
| JP4338604A | ||||
| JP2002270414A | ||||
| JP2001207201A | ||||
| JP2017010960A | ||||
| JP4308006A |
Foreign References:
| WO2015198396A1 | ||||
| US20140328710 |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuji Koga
Nobuo Sekine
Masaharu Konoue
Jun Tsuruta
Tetsuji Koga
Nobuo Sekine
Masaharu Konoue