Thermodynamics and Kinetics of Metastable Alloy Formation

亚稳态合金形成的热力学和动力学

• 批准号: 8820285
• 负责人: Michael Atzmon
• 金额: $ 25.19万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-05-01 至 1993-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8820285&HistoricalAwards=false
• 关键词: Thermodynamics; Kinetics; Metastable; Alloy; Formation

This research explores a new approach to forming glassy metals, solid state amorphization reactions. The program takes three concurrent paths: the measurement of the thermodynamic properties of supersaturated solid solutions; the formation of amorphous structure through solid state reactions; and light-ion irradiation to enhance formation of amorphous structure by changing the free energy balance between competing phases. An effort is made to separate the thermodynamic effects from the kinetic effects in these solid state reactions. Enthalpies of the phases are measured by differential scanning calorimetry and degree of internal strain and structure characterized by X-ray and transmission electron microscopy.

这项研究探索了一种新的方法， 金属，固态非晶化反应。 节目以 三条并行路径：热力学测量 过饱和固溶体的性质; 通过固态反应形成非晶结构;以及轻离子 辐照以增强非晶结构形成， 改变竞争相之间的自由能平衡。 一个 努力将热力学效应与 这些固态反应中的动力学效应。 焓 通过差示扫描量热法测量相， X射线表征的内部应变程度和结构 和透射电子显微镜。