Thermodynamics and Kinetics of Metastable Alloy Formation

本研究探索了一种形成玻璃态金属的新方法——固态非晶化反应。该程序采用三个并行路径：测量过饱和固溶体的热力学性质；通过固相反应形成非晶结构；而光离子辐照通过改变竞争相之间的自由能平衡来促进非晶结构的形成。人们努力把这些固态反应中的热力学效应和动力学效应区分开来。用差示扫描量热法测量了相的焓，用x射线和透射电子显微镜对其内部应变和结构进行了表征。

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.