Title:
IRON BASED RARE EARTH ALLOY MAGNET AND METHOD FOR MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP3583116
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a permanent magnet with high coercivity and excellent rectangularity in demagnetization curve although containing less rare earth.
SOLUTION: The magnet has a composition which is described by a formula (Fe1-mTm)100-x-y-zQxRyTiz (wherein T denotes one or more elements selected from the group consisting of Co and Ni, Q denotes one or more elements selected from the group consisting of B and C, and R denotes one or more rare earth metals not substantially including La or Ce) and contains R2T14Q type compound crystal grains and a ferromagnetic iron based boride. The ferromagnetic iron based boride forms a film along the boundaries in between R2T14Q type compound crystal grains, and covers the grain surfaces.
Inventors:
Hirokazu Kinsei
Toshio Miyoshi
Satoshi Hirosawa
Toshio Miyoshi
Satoshi Hirosawa
Application Number:
JP2002136134A
Publication Date:
October 27, 2004
Filing Date:
May 10, 2002
Export Citation:
Assignee:
Neomax corporation
International Classes:
C22C38/00; C22C38/10; H01F1/053; H01F1/08; (IPC1-7): H01F1/053; C22C38/00; C22C38/10; H01F1/08
Domestic Patent References:
| JP2298003A | ||||
| JP2000348919A | ||||
| JP5269549A | ||||
| JP2298003A | ||||
| JP2000348919A | ||||
| JP5269549A |
Attorney, Agent or Firm:
Seiji Okuda