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Evaluation of a Characteristic Temperature in the Relaxation of Metallic Glass Forming Liquids

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Abstract:

The high-temperature viscosity of metallic glass-forming liquids is investigated by using the Bond Strength-Coordination Number Fluctuation (BSCNF) model developed by the authors. For many glass-forming liquids, a salient change in the structural relaxation is observed above the melting point. The temperature dependence of the structural relaxation exhibits a deviation from an Arrhenius-like behavior, and upon cooling it transforms to a non-Arrhenius-like one. In the present study, we show that the BSCNF model describes well the high-temperature viscosity behaviors of metallic liquids. The analysis based on the BSCNF model also enables to extract a characteristic temperature at high temperature. The results of the present study show that such characteristic temperature can be a good indicator for the evaluation of the range of the transition from the Arrhenius-like to the non-Arrhenius-like relaxation behavior.

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Periodical:

Materials Science Forum (Volume 941)

Pages:

2331-2336

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.941.2331

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Online since:

December 2018

Authors:

Masaru Aniya*, Masahiro Ikeda

Keywords:

Arrhenius Temperature, BSCNF Model, Cooperativity, Metallic Glass Forming Liquids

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