Analysis of Thermodynamics Factors Affecting The Formation of Nanostrucured Super Saturated Solution in Mechanical Alloying of The Cu-Fe System

In this study، the thermodynamic factors with effects on the formation of non-equilibrium solutions in mechanical alloying have been investigated. The analyzed factors were the interface energy، the interface curvature and the stored energy of amorphous phase. For this purpose، a geometrical model with statistical considerations was first developed in order to investigate the dual-phase nanostructured systems. The mechanically alloyed Cu-Fe samples with the same weight percents were then prepared. The results of experimental XRD and TEM investigations were combined with those obtained from modeling. A comparative study was conducted for the effects of the mentioned factors. It was shown that the high solubility limit in the Cu-Fe system can be obtained by the continuous formation of amorphous nanometric regions and their subsequent transformation to solid solutions.