THE ROLE OF EXCLUDED VOLUME EFFECTS ON THE STRUCTURE AND CHEMICAL SHORT-RANGE ORDER OF NI33Y67 METALLIC-GLASS

The possibility of modelling the partial structure factors of the Ni 33Y67 amorphous alloy with simple purely repulsive potentials is investigated by extending and refining an approach previously proposed for the NixTi1-x alloys. Non-additive hard- and soft-sphere models are carefully studied by using integral equations originally derived in the theory of liquids. The quality of the approximations used and the consequences of softening the repulsion have been examined. The overall agreement between model and experimental data allows a meaningful discussion of the role of different regions of the interaction potential in the real system.