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Dynamics of crystallization with fractal geometry: Extended KJMA approach in glasses

Authors

  • Koichi Shimakawa

    Corresponding author
    1. Center of Innovative Photovoltaic Systems, Gifu University, Gifu 501-1193, Japan
    2. Nagoya Industrial Science Institute, Nagoya 460-0008, Japan
    • Phone: +81-58-241-2185, Fax: +81-58-241-2185
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  • Dedicated to Stanford R. Ovshinsky on the occasion of his 90th birthday

Abstract

Although the kinetics of crystallization under isothermal annealing conditions in glassy materials is fairly well understood by the Kolmogorov–Johnson–Mehl–Avrami (KJMA) formalism, there is still a matter of debate on its applicability. By introducing a fractal geometry and the Meyer–Neldel rule on thermally activated processes into the KJMA theory, we can overcome some of the difficulties with the classical KJMA mode, with maintaining its intuitive simplicity. Very reasonable physical parameters are deduced from the extended KJMA theory

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