【摘 要】
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It has been confirmed that glass-forming ability (GFA) of supercooled liquids is related to not only liquid phase stability but also the crystallization resista
【机 构】
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Institute of Materials Science and Engineering,Center for Nanoscience and Nanotechnology,National Su
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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-T2)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 ε=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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