Crystal Growth Velocity in As2Se3 Supercooled Liquid
作者： Jiří Málek , Jana Shánělová , Simona Martinková , Petr Pilný , Petr Koštál
关键词: Thermodynamics 、 Crystallography 、 Optical microscope 、 Viscosity 、 Isothermal process 、 Supercooling 、 Crystal growth 、 Activation energy 、 Kinetics 、 Crystal 、 Materials science
摘要: The crystal growth velocity of spherulitic As2Se3 in a supercooled melt the same composition was studied by optical microscopy and thermoanalytical methods isothermal nonisothermal conditions. time dependence size is linear, which suggests controlled interface kinetics. Crystal determined as slope these linear dependences. experimental results presented this paper considerably extend previously reported range velocity. All data can be well described standard two-dimensional surface nucleated model (2Dsg) including viscosity decoupling (ξ = 0.647). activation energy for microscopic experiments good agreement with values obtained from experiments, ratio viscous flow corresponds to an independently de...
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