Structural and Magnetic Properties of Nd（Fe,Mo）12Nx Compounds Produced by Strip-Casting Method

The strip casting （SC） technique is employed to fabricate Nd（Fe,Mo）12Nx magnets. The crystallographic structure, intrinsic and permanent magnetic properties, as well as the microstruetures of the compound are investigated. There are prominent advantages for the SC Nd-Fe-Mo ailoys and their nitrides when compared with the samples prepared by the conventional casting （CC） method： （1） SC technique rebounds to the formation of the compounds crystallizing in a ThMn12-type structure. A single-phased host alloy Nd（Fe,Mo）12 can be directly prepared by strip casting without any isothermal annealing. Accordingly, lower energy cost and less rare earth demand notablely benefit the manufacture processing from a point of economizing. （2） The intrinsic magnetic properties, such as Curie temperature To, saturation magnetization Ms and anisotropy field Ha of the SC sample exceed the CC sample due to a phase forming condition with less-Mo-depended. （3） The microstructure studies also demonstrate that the SC compound contains finer grains, better-proportioned phase distribution than the CC compound. Optimized finM particles are observed aligned in their easy axis and the energy product of powder sample is up to （BH）max - 22 MGOe （176 kJ/m3）.

Structural and Magnetic Properties of Nd(Fe,Mo)12Nx Compounds Produced by Strip-Casting Method