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Liquid–liquid transition in a strong bulk metallic glass-forming liquid

Author

Listed:
  • Shuai Wei

    (Saarland University)

  • Fan Yang

    (Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR))

  • Jozef Bednarcik

    (Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85)

  • Ivan Kaban

    (IFW Dresden, Institute for Complex Materials
    TU Dresden, Institute of Materials Science)

  • Olga Shuleshova

    (IFW Dresden, Institute for Complex Materials)

  • Andreas Meyer

    (Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR))

  • Ralf Busch

    (Saarland University)

Abstract

Polymorphic phase transitions are common in crystalline solids. Recent studies suggest that phase transitions may also exist between two liquid forms with different entropy and structure. Such a liquid–liquid transition has been investigated in various substances including water, Al2O3-Y2O3 and network glass formers. However, the nature of liquid–liquid transition is debated due to experimental difficulties in avoiding crystallization and/or measuring at high temperatures/pressures. Here we report the thermodynamic and structural evidence of a temperature-induced weak first-order liquid–liquid transition in a bulk metallic glass-forming system Zr41.2Ti13.8Cu12.5Ni10Be22.5 characterized by non- (or weak) directional bonds. Our experimental results suggest that the local structural changes during the transition induce the drastic viscosity changes without a detectable density anomaly. These changes are correlated with a heat capacity maximum in the liquid. Our findings support the hypothesis that the ‘strong’ kinetics (low fragility) of a liquid may arise from an underlying lambda transition above its glass transition.

Suggested Citation

  • Shuai Wei & Fan Yang & Jozef Bednarcik & Ivan Kaban & Olga Shuleshova & Andreas Meyer & Ralf Busch, 2013. "Liquid–liquid transition in a strong bulk metallic glass-forming liquid," Nature Communications, Nature, vol. 4(1), pages 1-9, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3083
    DOI: 10.1038/ncomms3083
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