Magnetic properties and loss separation in Fe76−xAgxNb2Si13B9 amorphous alloys
2015
Abstract Some selected properties (magnetic, plastic, elastic) in amorphous Fe 76− x Ag x Nb 2 Si 13 B 9 ( x = 0.5, 0.75, 1.0) alloys, obtained by melt spinning technique, are presented and discussed in detail. It was shown that a suitable heat treatment of the as quenched samples (i.e. the optimization annealing) leads to a significant improvement of soft magnetic properties (permeability increases at least 10 times). The observed effect is attributed to formation of the so-called relaxed amorphous phase free of iron nanograins. Special attention is paid for loss separation into different components: hysteresis loss, eddy-current loss and residual loss. The latter effect can be attributed to diffusion of free volume and practically disappear after the optimization annealing.
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