Production and Characterization of Nano Crystalline Fe۸۵Si۱۰Ni۵ Soft Magnetic Alloys by Mechanical Alloying

Abstract There are various methods to produce iron based nano crystalline magnetic alloys. Among these methods, mechanical alloying is one of the most important. In this research, nano crystalline Fe۸۵Si۱۰Ni۵ soft magnetic alloy was synthesized by mechanical alloying. The effect of alloying time on phase constituents and magnetic properties of the produced powders was investigated, by X-ray diffraction (XRD) and alternating gradient force magnetometer (AGFM). The XRD results showed that alloy formation started after ۲ hours of milling. Further milling resulted in the reduction of the grain size and lattice parameter. After ۶۰ hours of milling, the grain size was reduced to ۸ nm. AGFM results showed that magnetic saturation and coercivity depends on the alloying time. Increasing the alloying time, causes the increase of magnetic saturation and decrease of coercivity. Abstract There are various methods to produce iron based nano crystalline magnetic alloys. Among these methods, mechanical alloying is one of the most important. In this research, nano crystalline Fe۸۵Si۱۰Ni۵ soft magnetic alloy was synthesized by mechanical alloying. The effect of alloying time on phase constituents and magnetic properties of the produced powders was investigated, by X-ray diffraction (XRD) and alternating gradient force magnetometer (AGFM). The XRD results showed that alloy formation started after ۲ hours of milling. Further milling resulted in the reduction of the grain size and lattice parameter. After ۶۰ hours of milling, the grain size was reduced to ۸ nm. AGFM results showed that magnetic saturation and coercivity depends on the alloying time.

Keywords:

Nano crystalline materials , mechanical alloying , Soft magnetic powders , Magnetic properties