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Title:
PERMANENT MAGNET, MOTOR AND POWER GENERATOR
Document Type and Number:
WIPO Patent Application WO/2015/044974
Kind Code:
A1
Abstract:
Provided is a high-performance permanent magnet. The permanent magnet has a composition represented by a composition formula RpFeqMrCutCo100-p-q-r-t [wherein: R represents at least one element selected from rare earth elements; M represents at least one element selected from Zr, Ti and Hf; p is a number (atomic %) satisfying 10.5≤p≤12.5; q is a number (atomic %) satisfying 23≤q≤40; r is a number (atomic %) satisfying 0.88≤r≤4.5; and t is a number (atomic %) satisfying 4.5≤t≤10.7], and a metal structure comprising a cell phase that has a Th2Zn17-type crystalline phase, a cell wall phase that is formed so as to separate the Th2Zn17-type crystalline phase, an M-rich platelet phase that is formed perpendicular to the c-axis of the Th2Zn17-type crystalline phase and has a higher concentration of the element M than the cell phase, and a Cu-rich platelet phase that is formed along the M-rich platelet phase and has a higher Cu concentration than the cell phase.

Inventors:
HORIUCHI YOSUKE (JP)
SAKURADA SHINYA (JP)
OKAMOTO KEIKO (JP)
HAGIWARA MASAYA (JP)
KOBAYASHI TSUYOSHI (JP)
ENDO MASAKI (JP)
KOBAYASHI TADAHIKO (JP)
Application Number:
PCT/JP2013/005622
Publication Date:
April 02, 2015
Filing Date:
September 24, 2013
Export Citation:
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Assignee:
TOSHIBA KK (JP)
International Classes:
B22F3/00; H01F1/055; C22C1/04; C22C19/07; C22F1/10; H01F1/08; H02K1/27
Foreign References:
JP2013072097A2013-04-22
JP2013074235A2013-04-22
JPS63149362A1988-06-22
JP2013191815A2013-09-26
JP2010121167A2010-06-03
JP2008029148A2008-02-07
JP2008043172A2008-02-21
Other References:
See also references of EP 3051544A4
Attorney, Agent or Firm:
SAKURA PATENT OFFICE, p. c. (JP)
Patent business corporation cherry tree international patent firm (JP)
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