Mechanical milling has been applied to prepare Nd Fe Mo magnetic powders. For preparing the single phase Nd 1.5 Fe 10.5 Mo 1.5 compounds with ThMn 12 type structure, a mixture of amorphous phase and α Fe was obtained...Mechanical milling has been applied to prepare Nd Fe Mo magnetic powders. For preparing the single phase Nd 1.5 Fe 10.5 Mo 1.5 compounds with ThMn 12 type structure, a mixture of amorphous phase and α Fe was obtained by ball milling for 4～18 h. In the process of ball milling, the powders went through breaking and recombining, which were closely related to amorphous formation. The powders of nanostructured 1∶12 phase was formed after annealing at 700～850 ℃ for 10～40 min. The optimum magnetic properties were obtained with the following nitriding treatment at 500～550 ℃ for 1～2 h.展开更多
文摘Mechanical milling has been applied to prepare Nd Fe Mo magnetic powders. For preparing the single phase Nd 1.5 Fe 10.5 Mo 1.5 compounds with ThMn 12 type structure, a mixture of amorphous phase and α Fe was obtained by ball milling for 4～18 h. In the process of ball milling, the powders went through breaking and recombining, which were closely related to amorphous formation. The powders of nanostructured 1∶12 phase was formed after annealing at 700～850 ℃ for 10～40 min. The optimum magnetic properties were obtained with the following nitriding treatment at 500～550 ℃ for 1～2 h.
