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

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

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
Volume79
DOIs
Publication statusPublished - 2014 Oct 15

Keywords

  • Crystallization
  • Glass transition
  • Metallic glass
  • Ultrastable nanoglass

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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