Abstract
In the present paper, the influence of Nb and Cr on intensity of structural relaxation, crystallization processes, electric and magnetic properties in the Fe 76Nb 2Si 13B 9, Fe 76Cr 2Si 13B 9 and Fe 76Nb 1Cr 1Si 13B 9 alloys were investigated. It was shown that the improvement of magnetic permeability caused by a suitable annealing is a thermally activated process. Activation energy of this process is found to be of the order of 1 eV. Cr as an alloying addition to the Fe–Si–B alloy does not change the 1 h optimization annealing temperature and causes an increase of its efficiency. Nb as an alloying addition causes an increase of the 1 h optimization annealing temperature, and also the temperature of the first step of crystallization.
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