Correlating the Annealing Temperature Dependence of the Structural Inhomogeneity and the Diffusion in Zr-Ti-Cu-Ni-Be Glassy System

Abstract

The relation between the annealing temperature dependence of the structural inhomogeneity and the diffusion coefficient in a metallic glass forming system Zr-Ti-Cu-Ni-Be is studied by using reported experimental data. It is shown that the diffusion coefficient increases with the increase of the correlation length of the structural inhomogeneity. Interestingly, the result found resembles the behavior known in superionic glasses. A discussion on the found relationship is given by exploiting the model for the superionic glasses proposed by the author. Based on the model, an inhomogeneity dependent diffusivity maximum is predicted.

Diffusion in Metallic Glass-Forming Systems: A Description of the Kink Behavior Observed in the Temperature Dependence

“…The structural inhomogeneity observed in the glass [24] results from the freezing of such structures and changes by annealing [25]. In a recent study, the relation between the correlation length of the structural inhomogeneity and the diffusion coefficient was reported [26]. It is interesting to note that the result shown in Fig.…”

“…5. Relation between the diffusion coefficient of Be and the wave number associated with the correlation length of the structural inhomogeneity [26]. The experimental data are taken from [8,25].…”