Abstract
The effects of the partial substitution of Fe by Mn on the crystallization process and on the magnetic properties in a melt spun Fe 68.5Mn 5Si 13.5B 9CuNb 3 alloy have been analyzed. The crystallization process and structure after devitrification of the amorphous state were analyzed by Differential Scanning Calorimetry (DSC), Thermogravimetry analysis (TGA) and X-ray diffractometry. A fine nanocrystalline structure, composed of BCC-Fe rich nanograins surrounded by the residual amorphous phase, is obtained after thermal treatments at 550–600 °C. The temperature dependence of the magnetic properties (i.e. magnetic permeability) is analyzed taking into account the main changes in both magnetic phases upon annealing.
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