Title:
SINTERED NEODYMIUM MAGNET AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2013/100008
Kind Code:
A1
Abstract:
Provided are: a sintered neodymium magnet whereby, when used as a substrate for a grain-boundary diffusion process, RH can easily diffuse across rare-earth-rich phases and the substrate itself has high coercivity, maximum energy product, and squareness ratio; and a method for manufacturing said sintered neodymium magnet. This sintered neodymium magnet is characterized in that: the mean diameter of main-phase particles in said sintered neodymium magnet is less than or equal to 4.5 µm; the overall carbon content of the sintered neodymium magnet is less than or equal to 1,000 ppm; and the total volume of carbon-rich phases in rare-earth-rich phases at grain-boundary triple junctions in the sintered neodymium magnet is less than or equal to 50% of the total volume of said rare-earth-rich phases.
Inventors:
SAGAWA MASATO (JP)
MIZOGUCHI TETSUHIKO (JP)
MIZOGUCHI TETSUHIKO (JP)
Application Number:
PCT/JP2012/083786
Publication Date:
July 04, 2013
Filing Date:
December 27, 2012
Export Citation:
Assignee:
INTERMETALLICS CO LTD (JP)
International Classes:
H01F1/08; B22F1/00; B22F1/05; B22F3/00; C22C33/02; H01F1/057; H01F41/02
Domestic Patent References:
| WO2011004894A1 | 2011-01-13 | |||
| WO2010109760A1 | 2010-09-30 | |||
| WO2006043348A1 | 2006-04-27 | |||
| WO2011004894A1 | 2011-01-13 |
Foreign References:
| JP2008270699A | 2008-11-06 | |||
| JP2008266767A | 2008-11-06 |
Other References:
See also references of EP 2696355A4
Attorney, Agent or Firm:
Kyoto International Patent Law Office (JP)
Patent business corporation Kyoto international patent firm (JP)
Patent business corporation Kyoto international patent firm (JP)
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