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

Journal Article · · Nature Communications
 [1];  [2];  [3];  [3];  [4];  [5];  [5];  [5];  [6]
  1. Nanjing Univ. of Science and Technology, Nanjing (China); City Univ. of Hong Kong, Hong Kong (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. City Univ. of Hong Kong, Hong Kong (China)
  4. Australian Nuclear Science and Technology Organization (ANSTO), Kirrawee, NSW (Australia)
  5. Hokkaido Univ., Sapporo (Japan)
  6. City Univ. of Hong Kong, Hong Kong (China); City Univ. of Hong Kong Shenzhen Research Institute, Shenzhen (China)

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 upon quenching. Finally, the outcome of this study raises a possibility to manipulate the structure and hence the stability of metallic glasses through heat-treatment.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division; National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1372661
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (11)

Two-way tuning of structural order in metallic glasses journal January 2020
Recent Advances in Metallic Glass Nanostructures: Synthesis Strategies and Electrocatalytic Applications journal December 2018
Non-thermal crystallization process in heterogeneous metallic glass upon deep cryogenic cycling treatment journal March 2019
Two-way tuning of structural order in metallic glasses journal January 2020
Engineering medium-range order and polyamorphism in a nanostructured amorphous alloy journal September 2019
Relaxation processes and physical aging in metallic glasses journal November 2017
Ab initio inversion of structure and the lattice dynamics of a metallic glass: the case of Pd 40 Ni 40 P 20 journal July 2019
Effect of nanocrystalline process on microstructure of Zr-based metallic glass journal November 2018
QUOKKA, the pinhole small-angle neutron scattering instrument at the OPAL Research Reactor, Australia: design, performance, operation and scientific highlights journal March 2018
Ab initio inversion of structure and the lattice dynamics of a metallic glass: The case of Pd40Ni40P20 text January 2019
Engineering medium-range order and polyamorphism in a nanostructured amorphous alloy text January 2019

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