Title:
【発明の名称】等方性耐熱ボンド磁石およびその製造方法ならびにそれを用いる磁粉、それを用いたPM型モータ
Document Type and Number:
Japanese Patent JP2843379
Kind Code:
B2
Abstract:
A rare earth-iron-boron permanent magnet alloy having a composition represented by the formula: RaFebBcMd, wherein R represents one or more rare earth elements, M represents at least one element selected from the group consisting of A l , Si, Cu, Nb, W, V, Mo and Ta, 20% or less of Fe may be substituted by Co, and a, b, c and d are atomic % satisfying a: 10-15, b: balance, c: 4-8, and d: 10 or less, the magnet alloy having an average crystal grain size of 0.01-0.2 mu m (0.2 mu m or less in 90% or more by area of the crystal grains). This magnet alloy can be used to provide an isotropic bonded magnets which may be used of PM motors.
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Inventors:
HASEGAWA MUNEHISA
SHIMIZU MOTOHARU
SHIMIZU MOTOHARU
Application Number:
JP25951489A
Publication Date:
January 06, 1999
Filing Date:
October 04, 1989
Export Citation:
Assignee:
HITACHI KINZOKU KK
International Classes:
B22F1/00; C21D6/00; C22C1/04; C22C38/00; B22F9/04; C22C38/10; C22C45/02; H01F1/057; H01F1/08; H02K1/02; H02K15/03; (IPC1-7): H01F1/08; C22C38/00; C22C38/10; H02K15/03
Domestic Patent References:
| JP63232301A | ||||
| JP62261102A |
Attorney, Agent or Firm:
Oba Mitsuru