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

在原子水平上研究金属的结构，如下：(1)研究了扩散点缺陷与探针原子和点缺陷配合物的反应速率，以确定金属中的局部晶格应变；(2)测量半径小于100 nm的纳米金属团簇中探针原子的点阵位，表征团簇结构对其大小的依赖；(3)研究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。微扰角相关测量和穆斯堡尔光谱是研究中使用的主要实验工具。

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.