New criterion in predicting glass forming ability of various glass-forming systems
X. H. Du(杜兴蒿)a)b)† and J. C. Huang(黄志青)a)
a Institute of Materials Science and Engineering, Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, Taiwan 804, China; b Department of Materials Engineering, Shenyang Institute of Aeronautical Engineering, Shenyang 110034, China
Abstract It has been confirmed that glass-forming ability (GFA) of supercooled liquids is related to not only liquid phase stability but also the crystallization resistance. In this paper, it is found that the liquid region interval ($T_{\rm l}-T_{\rm g})$ characterized by the normalized parameter of $T_{\rm g}$/$T_{\rm l}$ could reflect the stability of glass-forming liquids at the equilibrium state, whilst the normalization of supercooled liquid region $\Delta T_{\rm x}$=($T_{\rm x}-T_{\rm g})$, i.e. $\Delta T_{\rm x}$/$T_{\rm x}$ (wherein $T_{\rm l}$ is the liquidus temperature, $T_{\rm g}$ the glass transition temperature, and $T_{\rm x}$ the onset crystallization temperature) could indicate the crystallization resistance during glass formation. Thus, a new parameter, defined as $\xi =T_{\rm g}$/$T_{\rm l}+\Delta T_{\rm x}$/$T_{\rm x}$ is established to predict the GFA of supercooled liquids. In comparison with other commonly used criteria, this parameter demonstrates a better statistical correlation with the GFA for various glass-forming systems including metallic glasses, oxide glasses and cryoprotectants.
Fund: Project supported by National
Science Council, Taiwan, China (Grant No NSC 94-2216-E-110-010) and
post-doc sponsorship from National Science Council, Taiwan, China
(Grant No NSC 95-2816-E-110-001).
Cite this article:
X. H. Du(杜兴蒿) and J. C. Huang(黄志青) New criterion in predicting glass forming ability of various glass-forming systems 2008 Chin. Phys. B 17 249
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