Title:
NITRIDE TYPE RARE-EARTH PERMANENT MAGNET MATERIAL AND BONDED MAGNET USING THE SAME
Document Type and Number:
WIPO Patent Application WO/1999/062081
Kind Code:
A1
Abstract:
A nitride type rare-earth permanent magnet material which has a basic composition represented by R¿$g(a)?T¿100-($g(a)$g(b)$g(g)$g(d))?M¿$g(b)?B¿$g(g)?N¿$g(d)? in terms of atomic % wherein R represents at least one of rare-earth elements including Y and contains Sm, T represents Fe alone or a combination of Fe and Co and/or Ni, M represents at least one element selected from the group consisting of Al, Ti, V, Cr, Mn, Cu, Ga, Zr, Nb, Mo, Hf, Ta, W and Zn, 6$m(F)$g(a)$m(F)15, 0.5$m(F)$g(b)$m(F)10, 0$m(F)$g(g)$m(F)4, and 4$m(F)$g(d)$m(F)30, and substantially comprises a hard magnetic phase of R¿2?T¿17? type structure having a mean grain diameter of 0.01 to 1 $g(m)m, and has a mean area ratio for $g(a)-Fe of 5 % or less.
Inventors:
OKAJIMA HIROSHI (JP)
TOBISE MASAHIRO (JP)
SHINDO MIKIO (JP)
TOBISE MASAHIRO (JP)
SHINDO MIKIO (JP)
Application Number:
PCT/JP1999/002746
Publication Date:
December 02, 1999
Filing Date:
May 25, 1999
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
OKAJIMA HIROSHI (JP)
TOBISE MASAHIRO (JP)
SHINDO MIKIO (JP)
OKAJIMA HIROSHI (JP)
TOBISE MASAHIRO (JP)
SHINDO MIKIO (JP)
International Classes:
H01F1/059; (IPC1-7): H01F1/06
Foreign References:
| JPH0837122A | 1996-02-06 |
Attorney, Agent or Firm:
Takaishi, Kitsuma (67 Kagurazaka 6-chome Shinjuku-ku Tokyo, JP)
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