Hidden amorphous phase and reentrant supercooled liquid in Pd-Ni-P metallic glasses

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • S. Lan
  • Y. Ren
  • E. P. Gilbert
  • T. Shibayama
  • S. Watanabe
  • M. Ohnuma

Detail(s)

Original languageEnglish
Article number14679
Journal / PublicationNature Communications
Volume8
Publication statusPublished - 17 Mar 2017

Link(s)

Abstract

An anomaly in differential scanning calorimetry has been reported in a number of metallic glass materials in which a broad exothermal peak was observed between the glass and crystallization temperatures. The mystery surrounding this calorimetric anomaly is epitomized by four decades long studies of Pd-Ni-P metallic glasses, arguably the best glass-forming alloys. Here we show, using a suite of in situ experimental techniques, that Pd-Ni-P alloys have a hidden amorphous phase in the supercooled liquid region. The anomalous exothermal peak is the consequence of a polyamorphous phase transition between two supercooled liquids, involving a change in the packing of atomic clusters over medium-range length scales as large as 18 Å. With further temperature increase, the alloy reenters the supercooled liquid phase, which forms the room-temperature glass phase on quenching. The outcome of this study raises a possibility to manipulate the structure and hence the stability of metallic glasses through heat treatment.

Research Area(s)

Citation Format(s)

Hidden amorphous phase and reentrant supercooled liquid in Pd-Ni-P metallic glasses. / Lan, S.; Ren, Y.; Wei, X. Y.; Wang, B.; Gilbert, E. P.; Shibayama, T.; Watanabe, S.; Ohnuma, M.; Wang, X. L.

In: Nature Communications, Vol. 8, 14679, 17.03.2017.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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