High Pressure/High Temperature Studies on Transition Metals and Alloys

过渡金属和合金的高压/高温研究

• 批准号: 9017194
• 负责人: Yogesh Vohra
• 金额: $ 6.54万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-01 至 1992-08-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017194&HistoricalAwards=false
• 关键词: Pressure; Temperature; Studies; Transition; Metals

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.

这项研究的目的是研究晶体结构， 电子结构和金属系统中的键合变化. 压力和温度的极端条件。 校准 超过400万个大气压的压力已经实现， 金刚石压砧装置。 这种能力与激光相结合 同步加速器研究设施的加热技术， 极端静态条件下的相结构。 研究 包括来自过渡金属的原型金属合金， 包括铼-钌、钨-钌和钛， 铝在施加的高压下检查相稳定性 和温度。 其它感兴趣的金属包括钍， 镨和钕。 这些研究应该改进 对高压、高温和 组成对金属中相稳定性和结构的影响 系统.