A New Ceramic/Graphite Composite Micro-Heater for Rapid Resistive Heating in the Diamond Anvil Cell and Dynamic Diamond Anvil Cell

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. 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. Resistive heating in a diamond anvil cell (DAC) is a technique which has been utilized since as early as the 1960’s; and in that time, there have been numerous methods which have been employed. While all of these different techniques are elegant in their own way, they each have drawbacks which make them unsuitable for rapid compression experiments in the dDAC. With this in mind, we have developed a new ceramic-graphite composite micro-heater for use in the DAC and dDAC which can be used for both traditional high temperature static compression experiments and dynamic compression experiments. These new heaters have the capability to rapidly heat the sample at rates up to 25 K/s, and have been tested up to a maximum temperature of 1100 K. In this talk, I will discuss the development and capabilities of these heaters and present multiple benchmarking case studies, as well as discuss work done on mapping the high temperature high pressure phase boundaries of Sn.