Abstract
Effects of yttrium additions on glass-forming ability of the model system (Cu0.48Zr0.48Al0.04)100−xYx (x=0–7at.%) were studied in detail by using a “perturbation theory” approach. Introduction of the atomic-level strain energy into the driving force for the crystal nucleation well explained the beneficial effects of yttrium additions. It was found that the atomic-level strain energy is related closely to the atomic packing efficiency of the precipitated crystals and less yttrium amount is needed to suppress the precipitation of crystal phase with a higher atomic packing efficiency, which is consistent with the experimental observations.
Published Version
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