| About this Abstract |
| Meeting |
2016 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bulk Metallic Glasses XIII
|
| Presentation Title |
Temperature-dependent Average Nearest-neighbor Distance in Metallic Melts |
| Author(s) |
, X.D. Wang, Q. Yu, Q.P. Cao, D.X. Zhang |
| On-Site Speaker (Planned) |
|
| Abstract Scope |
Here we report that the average atomic distance between centre atom and atoms in the first shell contracts for several metallic liquids upon heating. This anomaly could be caused by the redistribution of polyhedral clusters affected by temperature. In metallic liquids the high-coordinated polyhedra are inclined to evolve into low-coordinated ones with increasing temperature. As the coordination number decreases, the average atomic distance between centre atom and atoms in the first shell of polyhedral clusters is reduced. A liquid-to-liquid crossover in terms of peak position and coordination number of the first peak in the pair correlation functions is detected in the vicinity of the boiling points of Cd and Zn liquids. This anomaly is caused by preferential evaporation of smaller clusters from liquid to gaseous state when actual boiling event starts. Both phenomena could be a universal feature for metallic liquids, consisting of various-sized atomic clusters. |
| Proceedings Inclusion? |
Planned: A print-only volume |