Solid-state crystal-to-amorphous transition in metal‐metal multilayers and its thermodynamic and atomistic modelling
Solid-state crystal-to-amorphous transition in metal‐metal multilayers and its thermodynamic and atomistic modelling
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DOI：
10.1080/00018730110096112
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发表时间：
2001-06
影响因子：
--
通讯作者：
B. Liu;W. Lai;Z. J. Zhang
中科院分区：
文献类型：
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作者：
B. Liu;W. Lai;Z. J. Zhang
本文首先简要介绍了在二元金属体系中利用金属多层材料的固相反应生成非晶合金（或金属玻璃）的研究进展。其次，在Miedema模型的框架下，建立了晶体向非晶态转变的热力学模型，特别考虑了金属多层中过量的界面自由能。第三，给出了一些典型体系的分子动力学模拟结果，揭示了原子尺度上晶体向非晶态转变的详细动力学，如界面反应的温度/时间依赖性、非晶态中间层的不对称生长以及由界面织构引起的成核和/或生长障碍的存在。第四，通过分子动力学模拟，直接从原子间势确定了一些代表性体系的临界固溶度，然后将其与实验和/或模拟中观察到的体系的金属玻璃形成能力及其在固态非晶化过程中的不对称生长相关联。
In this review article, first a brief summary is presented concerning the formation of amorphous alloys (or metallic glasses) in binary metal systems by solid-state reaction of metallic multilayers. Secondly, under the framework of Miedema's model, thermodynamic modelling of crystal-to-amorphous transition is developed with special consideration of the excess interfacial free energy in metallic multilayers. Thirdly, the results of molecular dynamics simulations in some representative systems are presented, revealing the detailed kinetics of the crystal-to-amorphous transition on the atomic scale, such as the temperature/time dependence of interfacial reactions, the asymmetric growth of amorphous interlayers, and the nucleation and/or presence of growth barriers resulting from the interfacial texture. Fourthly, the critical solid solubilities of some representative systems are directly determined from the inter-atomic potentials through molecular dynamics simulations and then correlated with the metallic-glass-forming ability of the systems as well as their asymmetric growth during solid-state amorphization observed in experiments and/or simulations.