Structural characteristics of Cu_xZr_(100-x) metallic glasses by Molecular Dynamics Simulations

摘要

We present Molecular Dynamics Simulations results on the micro-structural characteristics of the Cu_xZr_(100-x) metallic glasses. In all stoichiometries studied, we found that the Cu-centered small icosa-hedral clusters (ICO) are a basic structured object present in the systems, while their number and their Cu content increases with Cu concentration. In addition, it came out that the solidification process upon cooling correlates with the ICO number evolution. These results are compared with ab-initio calculations within the Density Functional Theory for the clusters found. We anticipate that the present findings could help in understanding the micro-structure and the solidification processes in metallic glasses.