Exploring the Effect of Temperature and Compression Rate on Phase Transition Boundaries in Tin

The development of the dynamic diamond anvil cell (dDAC) has created the ability to probe potential kinetic effects on the high-pressure behavior of different materials [Jenei et al., RSI, 2019]. The implementation of resistive heating to the dDAC adds an additional degree of freedom for probing a materials thermodynamic properties under controlled dynamic conditions. By precisely tuning compression rates from millisecond timescales up to second timescales and temperatures up to 1000 °C, we can systematically probe phase transition mechanisms and help to bridge the gap between static and shock compression experiments. I will present our recent work on Sn dynamically compressed along its room temperature isotherm, as well as benchmarking static high-pressure high-temperature experiments measuring the β-Sn → BCT and BCT → BCC Clapeyron slopes. I will present a systematic study of the β-Sn → BCT and BCT → BCC transition pressures as a function of compression rate, as well as discuss the effect of transition rate on the large phase co-existence region of the kinetically hindered BCO → BCC phase transition.