The ultrastable kinetic behavior of an Au-based nanoglass

J. Q. Wang, N. Chen, P. Liu, Z. Wang, D. V. Louzguine-Luzgin, M. W. Chen, J. H. Perepezko

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90 Citations (Scopus)


Ultrastable glasses and nanoglasses are two emerging materials with novel properties that have been investigated separately. In order to explore the combined effect of ultrastable character and a nanoglass with a nanoglobular microstructure on the kinetic behavior, the glass transition and crystallization behaviors of an ultrastable nanoglass and a melt-spun ribbon of Au-based metallic glass were examined by differential scanning calorimetry at heating rates (φ) of up to 40,000 K s-1. The nanoglass shows ultrastable kinetic characters at low φ (e.g. 300 K s-1) and similar kinetic behaviors at high φ (e.g. 30,000 K s-1) compared to the melt-spun ribbon. The nanoglobular interfaces remain amorphous and appear to act as a kinetic constraint to induce a higher crystallization temperature compared to the melt-spun ribbon. The interface constraint effect disappears at 30,000 K s-1. These results indicate that the nanoglobular microstructure can act to increase metallic glass stability and provide another mechanism for the synthesis of ultrastable glass.

Original languageEnglish
Pages (from-to)30-36
Number of pages7
JournalActa Materialia
Publication statusPublished - 2014 Oct 15


  • Crystallization
  • Glass transition
  • Metallic glass
  • Ultrastable nanoglass


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