Chemical interaction and thermodynamic properties of (Cu,Ni)-Zr glass-forming alloys

Abstract

The model of ideal associative solutions was applied to analyze the influence of strong chemical interaction in (Cu,Ni)-Zr melts depending on their glass-forming ability. Within the model framework thermodynamic properties of both Ni-Zr and Cu-Zr systems in the liquid state were calculated. The formation enthalpies of intermetallic compounds of these systems were redefined by the matching procedure, taking into account the additive manifestation of chemical interaction. It was suggested that directed (covalent) interaction causes formation of associative complexes which impedes diffusion and slows down crystallization. The intensity of interparticle interaction in these alloys is found to have no decisive influence on their glass-forming ability.