Structural evolution during fragile-to-strong transition in CuZr(Al) glass-forming liquids

C. Zhou, L.N. Hu, Q.J. Sun, H.J. Zheng, C.Z. Zhang, Yuanzheng Yue

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In the present work, we show experimental evidence for the dynamic fragile-to-strong (F-S) transition in a series of CuZr(Al) glass-forming liquids (GFLs). A detailed analysis of the dynamics of 98 glass-forming liquids indicates that the F-S transition occurs around Tf-s ≈ 1.36 Tg. Using the hyperquenching-annealing-x-ray scattering approach, we have observed a three-stage evolution
pattern of medium-range ordering (MRO) structures during the F-S transition, indicating a dramatic change of the MRO clusters around Tf-s upon cooling. The F-S transition in CuZr(Al) GFLs is attributed to the competition among the MRO clusters composed of different locally ordering configurations. A phenomenological scenario has been proposed to explain the structural evolution from the fragile to the strong phase in the CuZr(Al) GFLs.
Original languageEnglish
Article number064508
JournalJournal of Chemical Physics
Issue number6
Number of pages9
Publication statusPublished - 14 Feb 2015


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