Atomic Structure and Defects in Metals and Alloys Studied by Hyperfine Interactions

通过超精细相互作用研究金属和合金中的原子结构和缺陷

• 批准号: 9014163
• 负责人: Gary Collins
• 金额: --
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-11-15 至 1994-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9014163&HistoricalAwards=false
• 关键词: Atomic; Structure; Defects; Metals; Alloys

Structures of metals are examined at the atomic level, as follows: (1) reaction rates of diffusing point defects with complexes of probe atoms and point defects are studied to determine local lattice strains in metals; (2) Lattice sites of probe atoms in nanoscale metal clusters with radii less than 100 nm are measured to characterize how the structures of clusters depend on their size; (3) High temperature ordered alloys are examined to find equilibrium point defects and diffusion mechanisms; (4) Phase transitions and defect structures are analyzed in shape memory alloys. Perturbed angular correlation measurements and Mossbauer spectroscopy are the primary experimental tools employed in the research.

从原子水平研究了金属的结构：（1）研究了扩散点缺陷与探针原子和点缺陷复合物的反应速率，以确定金属中的局域晶格应变：（2）测量了半径小于100 nm的纳米金属团簇中探针原子的晶格位置，以表征团簇结构与其尺寸的关系;（3）研究了高温有序合金的平衡点缺陷和扩散机制;（4）分析了形状记忆合金的相变和缺陷结构。微扰角关联测量和穆斯堡尔谱是本研究的主要实验工具。