Abstract
AbstractUsing homogeneous equilibria reactions for the description of chemical short range order tendencies in liquid alloys with compound forming tendency it is possible, with the association model, to describe different kinds of asymmetrical concentration dependences, to calculate the temperature dependences of the thermodynamic mixing functions as well as to extrapolate for multicomponent systems. Some exemplary results are shown. The existence of a chemical short range order is an important factor of influence on the glass formation ability obtained by rapid quenching from the liquid phase. On the one hand, it causes small chemical driving forces for a crystallization and, hereby, a thermodynamic promotion of glass formation. On the other hand, glass formation is additionally kinetically favoured, if the stoichiometric compositions of the associates in the liquid alloys are not in accordance with those of the crystalline equilibrium phases in the glass formation range.
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