Thermodynamics and Kinetics of Metastable Alloy Formation

介绍了亚稳合金形成的热力学和动力学 在机械合金化形成的合金中，离子 辐射和气相沉积。 焓和自由能 进行计算，以说明 一种过冷的液体。 应力和结构松弛效应 薄膜扩散的相平衡和反应动力学 通过X射线衍射、电子显微镜和 卢瑟福背散射光谱法。 电子辐照 非晶态合金与终固溶体的亚稳平衡 沉淀物是用来检查扩散机制， 点缺陷过饱和对非晶合金的影响 相平衡 %%% 这项研究有望促进我们对这两个问题的理解。 亚稳合金相的热力学和动力学方面 阵 这些不寻常的材料可以大量制造 并具有商业潜力。

The thermodynamics and kinetics of metastable alloy formation are investigated in alloys formed by mechanical alloying, ion irradiation, and vapor deposition. Enthalpy and free energy calculations are performed that account for excess specific heat of an undercooled liquid. Effects of stress and structural relaxation on phase equilibria and reaction kinetics in thin film diffusion couples are studied by X-ray diffraction, electron microscopy, and Rutherford backscattering spectrometry. Electron irradiation of amorphous alloys in metastable equilibrium with terminal solution precipitates is employed to examine diffusion mechanisms in amorphous alloys and the effects of point defect supersaturation on phase equilibria. %%% This research is expected to advance our understanding of both the thermodynamic and kinetic aspects of metastable alloy phase formation. These unusual materials can be made in large quantities and have commercial possibilities.