Title:
Ｒ－Ｔ－Ｂ系永久磁石
Document Type and Number:
Japanese Patent JP7379837
Kind Code:
B2
Abstract:
The object of the present invention is to provide an R-T-B based permanent magnet having a wide temperature range suitable for sintering. The R-T-B based permanent magnet in which R is one or more rare earth elements, T is a combination of Fe and Co, and B is boron. The R-T-B based permanent magnet comprises M, O, C, and N. M is three or more selected from Cu, Ga, Mn, Zr, and Al; and at least comprises Cu, Ga, and Zr. A content of each component is within a predetermined range. The R-T-B based permanent magnet includes main phase grains made of R2T14B compound and grain boundaries existing between main phase grains. The grain boundaries include a two-grain boundary which is a grain boundary formed between two adjacent main phase grains, and a Zr—B compound is included in the two-grain boundary.
Inventors:
Mariko Fujiwara
Makoto Iwasaki
Makoto Iwasaki
Application Number:
JP2019053653A
Publication Date:
November 15, 2023
Filing Date:
March 20, 2019
Export Citation:
Assignee:
SAE Magnetics(H.K.)Ltd.
International Classes:
H01F1/057; C22C38/00; H01F41/02
Domestic Patent References:
| JP2014027268A | ||||
| JP2016184735A | ||||
| JP2002075717A | ||||
| JP2017228771A | ||||
| JP2017017121A | ||||
| JP2015057820A | ||||
| JP2016143828A | ||||
| JP2017183318A | ||||
| JP2016143817A | ||||
| JP2017157832A |
Foreign References:
| WO2015147053A1 |
Attorney, Agent or Firm:
Maeda Suzuki International Patent Attorneys Corporation