A Novel Magnetic Hardening Mechanism for Nd?Fe?B Permanent Magnets Based on Solid?State Phase Transformation

MAGNETIC VISCOSITY IN NdFeB MAGNETS

The relaxation of the magnetization is calculated for isotropic and anisotropic magnets. For NdFeB magnets, the dependence of Sv on texture, above room temperature, is roughly consistent with the model, while the NdDyFeB magnets show no dependence upon texture.

FIM-ATOM PROBE INVESTIGATION OF MELT-SPUN PERMANENT MAGNETS BASED ON NdFeB

The microstructure of Nd15Fe7,B8 in the optimum magnetic state is compared to that of overquenched and heat treated specimens using Field Ion Microscopy (FIM) and Atom Probe (AP) techniques. Apart from the hard magnetic Nd2FeI4B ( (P ) and the nonmagnetic Nd,,,Fe4B4 ( 11 ) a metastable Nd7Fe3 phase controls the magnetic properties of melt-spun NdFeB ribbons. Furthermore the influence of a parti...

Permanent magnets and hard magnetic materials

This review deals with the definition and development of hard magnetic materials with special emphasis on more recent developments in this field. After discussing the fundamental properties of all hard magnetic materials, based on the intrinsic and extrinsic properties, some remarks on the history of hard magnetic materials and permanent magnets are given. The important hard ferrites are only b...

Magnetic reversal in Sm2Fe17Ny permanent magnets

The Pulse-Thermal Processing of ndFeB-Based nanocomposite Magnets

Pulse-thermal processing (PTP) based on high-density plasma arc lamp technology has been utilized to crystallize melt-spun NdFeB-based amorphous ribbons to form magnetic nanocomposites consisting of Nd 2 Fe 14 B and α-Fe phases. After applying suitable pulses, the NdFeB-based ribbons were developed with hard magnetic properties. The highest coercivity can be obtained for ribbons with a thicknes...