Structural and magnetic properties of nanostructured Fe_(50)(Co_(50))-6.5 wt% Si powder prepared by high energy ball milling

摘要

This work investigates the effects of 6.5 wt% Si addition and milling times on the structural and magnetic properties of Fe_(50)Co_(50) powders. For this purpose, at first the elemental Fe and Co powders were milled for 10 h to produce Fe_(50)Co_(50) alloy and then Si was added and the new product was milled again for different times. The microstructural and magnetic properties were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). The results show that the minimum crystallite size of the as-milled powders (~12 nm) has been achieved after introducing Si and milled for 8 h (total milling time of 18 h). Also an amount of 188 emu/g has been achieved for M_S. This amount of M_S is higher than most of those which have been already reported for M_S of different Fe-Si systems.