حسین رعنایی

Alloyed powders with combination of (Fe67 Ni33)70 Ti10 B20 at different milling times are obtained. Structural, magnetic and thermal characterizations are performed by using X- ray diffraction, scanning electron microscope, energy dispersive X-ray spectroscopy, differential scanning calorimetry, transmission electron microscopy and vibrating sample magnetometer. It is indicated that the crystallite size is sharply decreases in the initial stage of milling process and the microstructure tends to nanocrystalline structure with increasing milling time. A rapid drop in saturation magnetization is observed after 48 h milling time, while coercivity value attains to a lowest value of about 33 Oe. Heat analysis of the milled sample at 120 h shows an endothermic peak. The coercivity of the 120 h annealed sample is increased as compared to the starting powders.