THERMODYNAMICS OF LIQUID MG-SN ALLOYS

被引:27
作者
SINGH, RN [1 ]
JHA, IS [1 ]
PANDEY, DK [1 ]
机构
[1] BHAGALPUR UNIV,DEPT PHYS,BHAGALPUR 812007,INDIA
关键词
D O I
10.1088/0953-8984/5/16/006
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The large deviation from the ideal mixture behaviour and the concentration-dependent asymmetry in the thermodynamic properties of Mg-Sn liquid alloys is investigated within a simple theoretical model of heterocoordination (i.e. a model in which there is a preference for unlike atoms to be paired as nearest neighbours). This has been utilized to extract additional microscopic information such as concentration fluctuations and the chemical short-range order parameter. The analysis suggests that heterocoordination leading to the formation of chemical complexes Mg2Sn is likely to exist in the melt but is only of a weakly interacting nature, The interaction energies between the species of the melt are found to depend considerably on temperature and the alloy is chemically more ordered towards the Mg-rich end of the phase diagram.
引用
收藏
页码:2469 / 2478
页数:10
相关论文
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