Demixing behaviour in binary Cu-Co melt

作者：Qi Y; Wang L^*; Fang T

来源：Physics and Chemistry of Liquids, 2013, 51(6): 687-694.

DOI：10.1080/00319104.2013.782496

• Cu-Co melt
• demixing behaviour
• structure factor
• enthalpy of mixing
• interdiffusion coefficient

Molecular dynamics simulation has been performed to explore the structure, thermodynamics and dynamics properties of Cu-Co melt based upon embedded atom method (EAM). The pair correlation function of liquid Cu50Co50 show stronger interaction of homogeneous atom pairs. The coordination number (CN) of Cu-Cu and Co-Co in Cu50Co50 melt is a little higher than that of Cu-Co at temperature of 1800K. The calculated enthalpy of mixing is positive in the whole concentration range and S-CC(q) increases sharply at lower q, which are the typical features of dense fluid that exhibits phase segregation tendency. The interdiffusion coefficient shows same concentration dependence as that of demixing alloy. Our work indicates that Cu-Co melt exhibits weak demixing behaviour even at temperatures greater than those of bimodal curve.

• 出版日期2013-11-1
• 单位山东大学