کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1480174 | 1510399 | 2016 | 5 صفحه PDF | دانلود رایگان |
• The local structures of liquid MgxZn1 − x alloys have been characterized.
• The strongest chemical SRO exists in the glass former melt Mg70Zn30.
• The icosahedral 1551 bonding pairs increase greatly for the Mg70Zn30 liquid alloy.
• The self-diffusion coefficients reach minima for the Mg70Zn30 liquid alloy.
The liquid structures of a series of Mg-Zn alloys have been investigated in the present work by means of ab initio molecular dynamic simulation. Strong chemical short-range orders are observed for the eutectic alloy Mg70Zn30, i.e. the best glass former of Mg-Zn binary alloys, which is consistent with the experiment results. The pair analysis indicates the extraordinary abundance of icosahedral clusters in this eutectic liquid alloy. Furthermore, the self-diffusion coefficients of Mg and Zn reach minimum for the Mg70Zn30 alloy. The entire results offer an interpretation for the better glass forming ability of the Mg70Zn30 alloy.
Journal: Journal of Non-Crystalline Solids - Volume 447, 1 September 2016, Pages 262–266