|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Local Dynamics in Metallic Liquids Studied by Inelastic Neutron Scattering
||Zengquan Wang, Wojciech Dmowski, Hui Wang, Takeshi Egami, Kenneth Kelton
|On-Site Speaker (Planned)
Structure and dynamics in metallic liquids are not fully understood. Most metallic liquids show the Arrhenius behavior at high temperatures, and the super-Arrhenius behavior below the crossover temperature, <I>T<sub>A</sub></I>. The atomistic origin of this so-called crossover phenomenon is difficult to access without resolving liquid dynamics. To study the local dynamics in metallic liquids, we implemented the inelastic neutron scattering (INS) experiment on the electrostatically levitated liquid Zr<sub>50</sub>Cu<sub>50</sub> at different temperatures using ARCS, SNS. The dynamic structure function <I>S(Q,E)</I> in a large Q-E space was determined with high statistics. The van Hove correlation function <I>g(r,t)</I> was obtained through double Fourier transformation over <I>E</I> and <I>Q</I>. A microscopic-scale relaxation time was determined by analyzing the time dependence of the decaying <I>g(r,t)</I> peaks, and compared with results of viscosity measurement and molecular dynamics simulation.
||Planned: Supplemental Proceedings volume