Abstract

A comparative study of the kinetics of massive bulk crystallization of As₂Se₃, As_1.9Se₃, and As_2.1Se₃ bulk glasses at 240°C is performed using the Kolmogorov–Avrami model. A theoretical analysis of the experimental dependences of the linear growth rate of As₂Se₃ crystals on temperature and viscosity of the As₂Se₃ glass is performed. It is shown that the dislocation growth of crystals in the form of spherulites appears to be probable in the As₂Se₃ glass under overcooling at ∆T = 30–135°С. For individual lamellar crystals As₂Se₃ with dislocation-free faces inside the spherulites, a growth mechanism with surface two-dimensional nucleation (2Dsg model) appears to be probable at ∆T = 75–135°С.

中文翻译：

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过冷和化学计量学偏差对As 2 Se 3玻璃动力学和结晶机理的影响

摘要

使用Kolmogorov-Avrami模型，对240°C下As ₂ Se ₃，As _1.9 Se ₃和As _2.1 Se ₃块状玻璃的块状结晶动力学进行了比较研究。对As ₂ Se ₃晶体的线性生长速率对As ₂ Se ₃玻璃的温度和粘度的实验依赖性进行了理论分析。结果表明，在ΔT过冷下，As ₂ Se ₃玻璃中球晶形式的晶体的位错生长似乎很可能。= 30–135°С。对于球状晶体内部具有无位错面的单个层状晶体As ₂ Se ₃，在ΔT = 75–135°С时，可能存在具有表面二维成核的生长机制（2Dsg模型）。