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Abstract
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In this research work, structural and magnetic evolution of Co57Fe13Nb8Ta4B18 alloy, during mechanical
alloying process, have been investigated by using, X-ray diffraction, scanning electron microscopy, transmission
electron microscopy, electron dispersive X-ray spectroscopy, differential thermal analysis and
also vibrating sample magnetometer. It is observed that at 120 milling time, the crystallite size reaches
to about 7.8 nm. Structural analyses show that, the solid solution of the initial powder mixture occurs
at160 h milling time. The coercivity behavior demonstrates a rise, up to 70 h followed by decreasing tendency
up to final stage of milling process. Thermal analysis of 160 h milling time sample reveals two
endothermic peaks. The characterization of annealed milled sample for 160 h milling time at 427 C
shows crystallite size growth accompanied by increasing in saturation magnetization.
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