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Effect of Overcooling and Stoichiometry Deviations on Kinetics and Mechanism of Crystallization of As 2 Se 3 Glass
Glass Physics and Chemistry ( IF 0.8 ) Pub Date : 2020-05-07 , DOI: 10.1134/s1087659620020108 E. V. Shkol’nikov
中文翻译:
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
更新日期:2020-05-07
Glass Physics and Chemistry ( IF 0.8 ) Pub Date : 2020-05-07 , DOI: 10.1134/s1087659620020108 E. V. Shkol’nikov
Abstract
A comparative study of the kinetics of massive bulk crystallization of As2Se3, As1.9Se3, and As2.1Se3 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:
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