Abstract
Influence of thermal annealing as a function of temperature and time, in Fe83.7B14.8Cu1.5 alloy was monitored using magnetic measurements, differential scanning calorimetery (DSC), X- ray diffraction (XRD) to get information on correlation between structure, formed nano-crystalline phases and soft magnetic properties. Thermal annealing dependence of coercivity (Hc) and saturation magnetization (B2000) shows that these values are affected by the structural relaxation and the presence of the precipitated nanocrystals in the amorphous phase. For the studied samples lowest coercivity of 14.6 A/m and rather high saturation induction value of 1.99 Tesla was obtained after annealing at 390 oC/1h. Activation energy of crystallization is 1.82 ± 0.48 eV. Grain diameter and volume fraction of the nanograins varies between 16.5 − 29 nm and between 2 − 56 % respectively. Lattice parameter suggests the presence of α-Fe and Fe23B6 phase.
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