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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 10    No. 1    February 2000

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Structure and magnetic properties of Nd1.5Fe10.5Mo1.5Nx prepared by mechanical milling①
ZHANG Jiu-xing(张久兴), YANG Hong-chuan(杨洪川), ZHOU Mei-ling(周美玲), ZUO Tie-yong(左铁镛)

Department of Materials Science and Engineering, BeijingPolytechnic University, Beijing100022, P.R.China

Abstract:Mechanical milling has been applied to prepare Nd-Fe-Mo magnetic powders. For preparing the single-phase Nd1.5Fe10.5Mo1.5compounds with ThMn12-type structure, a mixture of amorphous phase andα-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.

 

Key words: ball milling; amorphous powders; multi-particles

ISSN 1672-7029
CN 43-1423/U

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