| New criterion in predicting glass forming ability of various glass-forming systems |
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| 作者姓名： | 杜兴蒿 黄志青 |
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| 作者单位： | Institute of Materials Science and Engineering,
Center for Nanoscience and Nanotechnology, National Sun Yat-Sen
University, Kaohsiung,
Taiwan 804, China\;Department of Materials Engineering, Shenyang Institute
of Aeronautical Engineering, Shenyang 11003;Institute of Materials Science and Engineering,
Center for Nanoscience and Nanotechnology, National Sun Yat-Sen
University, Kaohsiung,
Taiwan 804, China |
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| 基金项目： | 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). |
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| 摘 要： | 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 （T1 - Tg） characterized by the normalized parameter of Tg/T1 could reflect the stability of glass-forming liquids at the equilibrium state, whilst the normalization of supercooled liquid region △Tx=（Tx - Tg）, i.e. △Tx/Tx （wherein T1 is the liquidus temperature, Tg the glass transition temperature, and Tx the onset crystallization temperature） could indicate the crystallization resistance during glass formation. Thus, a new parameter, defined as ζ = Tg/T1＋△Tx/Tx 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.
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| 关 键 词： | 玻璃成形系统 玻璃形成能力 判断依据 结晶作用 |
| 收稿时间： | 2007-03-31 |
| 修稿时间： | 2007-04-29 |
New criterion in predicting glass forming ability of various glass-forming systems |
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| X. H. Du and J. C. Huang.New criterion in predicting glass forming ability of various glass-forming systems[J].Chinese Physics B,2008,17(1):249-254. |
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| Authors: | X H Du and J C Huang |
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| Institution: | Institute of Materials Science and Engineering,
Center for Nanoscience and Nanotechnology, National Sun Yat-Sen
University, Kaohsiung,
Taiwan 804, China; Institute of Materials Science and Engineering,
Center for Nanoscience and Nanotechnology, National Sun Yat-Sen
University, Kaohsiung,
Taiwan 804, China\;Department of Materials Engineering, Shenyang Institute
of Aeronautical Engineering, Shenyang 11003 |
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| 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. |
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| Keywords: | glass-forming systems glass
forming ability criterion |
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