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 addition 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 begin to systematically probe phase transition mechanisms and help to bridge the gap between static and shock compression experiments. In this talk I will discuss our recent work on Sn dynamically compressed in a resistively heated dDAC. I will present a systematic study of the β-Sn → BCT transition pressure as a function of compression rate, as well as discuss the effect of transition rate and temperature on the large phase co-existence region of the kinetically hindered BCO → BCC phase transition.