Interrelationship between the shear modulus of a metallic glass, concentration of frozen-in defects, and shear modulus of the parent crystal

Abstract

The Interstitialcy theory assumes that major structural defects defining the properties of glass are similar to dumbbell interstitials in crystalline metals. Within the framework of this approach, we showed that at a constant defect concentration, the temperature coefficient of the shear modulus of glass equals to that of the parent crystal, in agreement with the theory. Relaxation of the defect system leads to either positive or negative variation of this coefficient, depending on the sign of defect concentration change. A full map of the defect concentration for initial, relaxed, and quasi-equilibrium states of a Pd-based glass is presented.