Title:
RARE EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING RARE EARTH PERMANENT MAGNET
Document Type and Number:
WIPO Patent Application WO/2015/068681
Kind Code:
A1
Abstract:
[Problem] To improve magnetic properties of a rare earth permanent magnet containing neodymium, iron, and boron. [Solution] The present invention is a rare earth permanent magnet having a compound expressed in formula (1) as the main phase. In formula (1), M is an element selected from among any of cobalt, beryllium, lithium, aluminum, and silicon, and x satisfies 0.01 ≤ x ≤ 0.25. The main phase has an Nd-Fe-B layer and an Fe layer formed periodically, and a portion of the boron is substituted by one or more elements selected from a group comprising cobalt, beryllium, lithium, aluminum, and silicon. Additionally, the main phase includes terbium and praseodymium added to the above-mentioned contained components. The rare earth permanent magnet is further provided with an inter-granular phase containing one or more elements selected from a group comprising aluminum, copper, niobium, zirconium, titanium, and gallium.
Inventors:
EGUCHI HARUKI (JP)
NAKANOWATARI ISAO (JP)
YONEYAMA NATSUKI (JP)
TOMONO HIDEKAZU (JP)
TAKAHASHI HIROO (JP)
NAKANOWATARI ISAO (JP)
YONEYAMA NATSUKI (JP)
TOMONO HIDEKAZU (JP)
TAKAHASHI HIROO (JP)
Application Number:
PCT/JP2014/079183
Publication Date:
May 14, 2015
Filing Date:
November 04, 2014
Export Citation:
Assignee:
IHI CORP (JP)
International Classes:
H01F1/057; B22F3/00; C22C33/02; C22C38/00; H01F1/08
Foreign References:
| JP2010150604A | 2010-07-08 | |||
| JP2002327255A | 2002-11-15 | |||
| JPH118109A | 1999-01-12 | |||
| JP2005320628A | 2005-11-17 | |||
| JP2010074062A | 2010-04-02 | |||
| JP2003226944A | 2003-08-15 | |||
| JP2002038245A | 2002-02-06 | |||
| US5645651A | 1997-07-08 | |||
| JP2003217918A | 2003-07-31 | |||
| JP2008117855A | 2008-05-22 | |||
| JP2010074062A | 2010-04-02 | |||
| JP2008505500A | 2008-02-21 |
Other References:
G. S. CHAUBEY; J. P. LIU ET AL., J. AM. CHEM. SOC., vol. 129, 2007, pages 7214
O.LSNARD, J.APPL. PHYS., vol. 78, 1995, pages 1892 - 1898
O. ISNARD, J.APPL. PHYS., vol. 78, 1995, pages 1892 - 1898
F. IZUMI; K. MOMMA: "Three-dimensional visualization in powder diffraction", SOLID STATE PHENOM., vol. 130, 2007, pages 15 - 20
D.GIVORD; H.-S.LI; J.M.MOREAU: "Magnetic properties and crystal structure of NdsFeuB", SOLID STATE COMMUNICATIONS, vol. 50, 1984, pages 497 - 499, XP024541708, DOI: doi:10.1016/0038-1098(84)90315-6
See also references of EP 3067900A4
O.LSNARD, J.APPL. PHYS., vol. 78, 1995, pages 1892 - 1898
O. ISNARD, J.APPL. PHYS., vol. 78, 1995, pages 1892 - 1898
F. IZUMI; K. MOMMA: "Three-dimensional visualization in powder diffraction", SOLID STATE PHENOM., vol. 130, 2007, pages 15 - 20
D.GIVORD; H.-S.LI; J.M.MOREAU: "Magnetic properties and crystal structure of NdsFeuB", SOLID STATE COMMUNICATIONS, vol. 50, 1984, pages 497 - 499, XP024541708, DOI: doi:10.1016/0038-1098(84)90315-6
See also references of EP 3067900A4
Attorney, Agent or Firm:
OHGA, Shinji et al. (JP)
Heartly congratulation Shinji (JP)
Heartly congratulation Shinji (JP)
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