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

Author

Furusawa, Ko ; Yamamoto, Hiroshi

Author_Institution

Sch. of Sci. & Technol., Meiji Univ., Kawasaki, Japan

fYear

2005

fDate

4-8 April 2005

Firstpage

1649

Lastpage

1650

Abstract

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 H_cJ and J_r 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.

Keywords

Curie temperature; X-ray diffraction; boron alloys; cobalt alloys; coercive force; compression moulding; crystal microstructure; crystal structure; demagnetisation; iron alloys; melt spinning; neodymium alloys; niobium alloys; permanent magnets; praseodymium alloys; terbium alloys; transmission electron microscopy; vanadium alloys; Curie temperature; NdPrFeCoNbVTbB; Tb substitution; X-ray diffraction; coercivity; compression molding; demagnetization; isotropic bonded magnets; magnetic properties; melt-spun ribbons; pulsed magnetization; structural properties; temperature coefficient; transmission electron microscopy; vibrating sample magnetometer; Bonding; Coercive force; Compression molding; Iron alloys; Magnetic properties; Magnetization; Magnets; Powders; Pulse measurements; Temperature dependence;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1464258

Filename

1464258