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Critical assessment of the alleged failure of the Classical Nucleation Theory at low temperatures
Journal of Non-Crystalline Solids ( IF 3.5 ) Pub Date : 2020-07-20 , DOI: 10.1016/j.jnoncrysol.2020.120297
Daniel R. Cassar , André H. Serra , Oscar Peitl , Edgar D. Zanotto

The Classical Nucleation Theory allegedly fails to describe the temperature dependence of the homogeneous crystal nucleation rates below the temperature of maximum nucleation, Tmax. Possible explanations for this suspected breakdown have been advanced in the literature. However, the simplest hypothesis has never been tested, that it is a byproduct of nucleation datasets that have not reached the steady-state regime. In this work, we tested this possibility by analyzing published nucleation data for oxide supercooled liquids, using only nucleation and viscosity data measured in samples of the same glass batch that also have satisfied a steady-state regime test. Furthermore, all the uncertainty and regression confidence bands were computed and considered. Having this rigorous protocol, among the 6 datasets analyzed, we only found weak evidence supporting the existence of the nucleation break in 2 datasets. Our collective results thus indicate that the break at Tmax is not a common feature of all glass-formers.



中文翻译:

对低温下经典成核理论据称失败的严格评估

据称,经典成核理论未能描述均质晶体成核速率在最大成核温度T max以下的温度依赖性。。有关这种可疑故障的可能解释已在文献中提出。但是,最简单的假设从未得到检验,它是尚未达到稳态的成核数据集的副产品。在这项工作中,我们仅使用已满足稳态试验的同一批玻璃样品中测得的成核和粘度数据,通过分析已发布的氧化物过冷液体的成核数据来测试这种可能性。此外,计算并考虑了所有不确定性和回归置信度带。有了这种严格的协议,在分析的6个数据集中,我们仅发现了微弱的证据支持2个数据集中存在成核断裂。因此,我们的集体结果表明,在T max处的断裂 不是所有玻璃成型者的共同特征。

更新日期:2020-07-20
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