Observation of the solid-solid and liquid-solid phase transitions in Tin (Sn) at the µs-timescale

We propose here to perform dynamic compression experiments on Sn probed by time-resolved XRD at the ESRF, exploiting the extraordinary capabilities of the beamline ID09, to observe how kinetics effects at high strain rates will influence its solid β - solid γ and liquid-solid structural transitions. Dynamic compression of the sample will be performed using our improved dynamic diamond anvil cell that allows now compression and decompression ramps spanning 3 orders of magnitude in time between 200 μs to 100 ms. The temperature of the compression can be also be increased up to ~1000K.

本研究拟在欧洲同步辐射光源（ESRF）的ID09光束线站，采用时间分辨X射线衍射（time-resolved XRD）对锡（Sn）开展动态压缩实验，依托该光束线站的卓越性能，探究高应变率下的动力学效应如何影响其固态β-固态γ与液-固结构相变。本实验将使用自研升级后的动态金刚石压砧（dynamic diamond anvil cell）完成样品的动态压缩，该装置可实现加压与减压的时间斜坡跨度达三个数量级，时间覆盖区间为200微秒（μs）至100毫秒（ms）。实验过程中还可将压缩温度提升至约1000开尔文（K）。