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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Crystallization of glass-forming melts: New answers to old questions
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Crystallization of glass-forming melts: New answers to old questions

机译：玻璃形成熔体的结晶：旧问题的新答案

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摘要

In classical nucleation theory, the thermodynamic driving force of crystallization is computed by comparing the bulk properties of the liquid and crystal phases for the respective macroscopic samples. Such approach represents a reasonable approximation as far as the bulk properties of the critical clusters do not deviate significantly from the properties of the newly evolving macroscopic phases. However, in general, this assumption is not true and may lead to incorrect results. As one consequence, the classical approach utilizing, in addition, the capillarity approximation overestimates as a rule the work of critical cluster formation and underestimates the steady-state nucleation rate. Based on a generalization of the classical Gibbs' approach, the basic equations are formulated here allowing one a correct determination of the properties of the critical clusters and of the work of critical cluster formation. In this way, a new tool for the quantitative description of crystal nucleation has been advanced retaining the advantages of the classical treatment but avoiding its shortcomings. Several general consequences are discussed. In particular, it is demonstrated that this method opens a new perspective in the interpretation of possible effects of atomic-scale structure of the melts on the rate of crystal nucleation.
机译：在典型成核理论中，通过比较各异宏观样品的液体和晶相的堆积性质来计算结晶的热力学驱动力。除了临界簇的堆积性质不显着地，这种方法表示合理的近似，从新的演化宏观相的性质显着偏离。但是，一般而言，这种假设不是真的，可能导致结果不正确。作为一种后果，经典方法的利用，另外，毛细比近似高估了临界集群形成的工作并低估了稳态成核速率。基于经典吉布斯的方法的概括，这里配制了基本方程，允许正确确定临界集群的性质和临界集群形成的工作。通过这种方式，晶体成核的定量描述的新工具已经提出保留了经典治疗的优点，但避免了其缺点。讨论了几种一般后果。特别地，证明该方法在解释熔体原子结构对晶体成核速率的解释中开启了一种新的视角。

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