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Magnetic properties of high coercivity melt-spun didymium-Fe-Co-Nb-V-Tb-B system ribbons and their bounded magnets

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2 Author(s)
K. Furusawa ; Sch. of Sci. & Technol., Meiji Univ., Kawasaki, Japan ; H. Yamamoto

The effects of Tb substitution for Fe in melt-spun ribbons of didymium-Fe-Co-Nb-V-Tb-B system alloys on the magnetic properties and the temperature dependence of the ribbons and their bonded magnets are investigated. The compression molding isotropic bonded magnets are made by using melt-spun didymium-Fe-Co-Nb-V-Tb-B powder crushed under 150 μm. After 4.8 MA/m pulsed magnetization, the magnetic properties of the ribbons, Curie temperature and temperature coefficient of HcJ and Jr for ribbons are measured by a vibrating sample magnetometer. The structural properties of the ribbons are examined using X-ray diffraction and transmission electron microscopy. The results show high quality magnetic properties in the melt-spun ribbons with high coercivity. The demagnetization curves and temperature dependence of the bonded magnets are also shown.

Published in:

INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.

Date of Conference:

4-8 April 2005