High Pressure/High Temperature Studies on Transition Metals and Alloys

本研究的目的是研究金属体系在极端压力和温度条件下的晶体结构、电子结构和键合变化。在金刚石砧细胞装置中，已经实现了超过400万大气压的校准压力。这种能力与同步加速器研究设施的激光加热技术相结合，可以在极端静态条件下检查相结构。研究包括过渡金属的原型金属合金，包括钼-钌，钨-铼和钛-铝，以检查在高压和高温下的相稳定性。其他感兴趣的金属包括钍、镨和钕。这些研究应该提高对高压、高温和成分对金属体系相稳定性和结构的影响的基本理解。

The goal of this research is to study crystal structures, electronic structures, and bonding changes in metallic systems at extreme conditions of pressures and temperatures. Calibrated pressures of over 4 million atmospheres have been achieved in diamond anvil cell devices. This capability is combined with laser heating techniques at synchrotron research facilities to examine phase structure under extreme static conditions. The research includes prototype metallic alloys from the transition metals, including molybdenum-ruthenium, tungsten-rhenium, and titanium- aluminum to examine phase stability under imposed high pressures and temperatures. Other metals of interest include thorium, praseodymium, and neodymium. These studies should improve fundamental understanding of high pressure, high temperature, and compositional effects on phase stability and structure in metallic systems.