Title:
ALLOY MATERIAL FOR R-T-B-BASED RARE EARTH PERMANENT MAGNET, PRODUCTION METHOD FOR R-T-B-BASED RARE EARTH PERMANENT MAGNET, AND MOTOR
Document Type and Number:
WIPO Patent Application WO/2012/029527
Kind Code:
A1
Abstract:
The present invention provides an alloy material for an R-T-B-based rare earth permanent magnet capable of high coercivity (Hcj) and a highly productive production method for the R-T-B-based rare earth permanent magnet using same. The present invention is an R-T-B-based alloy comprising: R, which represents two or more rare earth elements; T, which represents a transition metal essentially including Fe; B; and unavoidable impurities. The present invention relates to an alloy material for an R-T-B-based rare earth permanent magnet, that includes a metal powder and an R-T-B-based alloy with a Dy content of more than 10% by mass and less than 31% by mass.
Inventors:
NAKAJIMA KENICHIRO (JP)
YAMAZAKI TAKASHI (JP)
YAMAZAKI TAKASHI (JP)
Application Number:
PCT/JP2011/068411
Publication Date:
March 08, 2012
Filing Date:
August 12, 2011
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
NAKAJIMA KENICHIRO (JP)
YAMAZAKI TAKASHI (JP)
NAKAJIMA KENICHIRO (JP)
YAMAZAKI TAKASHI (JP)
International Classes:
C22C38/00; B22F1/00; B22F3/00; C22C33/02; H01F1/053; H01F41/02
Domestic Patent References:
| WO2005043558A1 | 2005-05-12 | |||
| WO2007088718A1 | 2007-08-09 | |||
| WO2008032667A1 | 2008-03-20 |
Foreign References:
| JPS6325904A | 1988-02-03 | |||
| JP2007266199A | 2007-10-11 | |||
| JP4450239B2 | 2010-04-14 | |||
| JP2008263243A | 2008-10-30 |
Other References:
SUGIMOTO, J. JPN. SOC. POWDER POWDER METALLURGY, vol. 57, no. 6, 2010, pages 395 - 400
W.F.LI, ACTA MATERIALIA, vol. 57, 2009, pages 1337 - 1346
MATSUURA: "The Papers of Technical Meeting on Magnetics", vol. MAG-09, 2009, THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN, pages: 77 - 81
W.F.LI, ACTA MATERIALIA, vol. 57, 2009, pages 1337 - 1346
MATSUURA: "The Papers of Technical Meeting on Magnetics", vol. MAG-09, 2009, THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN, pages: 77 - 81
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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