Structural relaxation processes in FeSiB-Cu(Nb, X), X=Mo, V, Zr, Nb glassy alloys

Structural relaxation in FeSiB-Cu(NbX) alloys is evidenced by enthalpy release exothermic DSC maxima and by changes in the Curie temperature of the amorphous phase upon annealing. A monotonic increase in TC with annealing temperature and time is found and the equilibrium TC values show a linear dependence with the inverse of the annealing temperature. An uniformly linear log (time) kinetics results and the relaxation time decreases exponentially as the annealing temperature increases.