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Viscosity anomaly of a metallic glass-forming liquid under high pressure

Journal Article · · Journal of Non-Crystalline Solids
 [1];  [2];  [3];  [4];  [2];  [5]
  1. Southeast University, Nanjing (China); Center for High Pressure Science and Technology Advanced Research, Shanghai (China)
  2. Center for High Pressure Science and Technology Advanced Research, Shanghai (China)
  3. Ehime University, Matsuyama (Japan); Carnegie Institution of Washington, Argonne, IL (United States)
  4. Carnegie Institution of Washington, Argonne, IL (United States); Okayama University, Misasa, Tottori (Japan)
  5. Southeast University, Nanjing (China); Center for High Pressure Science and Technology Advanced Research, Shanghai (China); Shanghai Advanced Research in Physical Sciences (SHARPS), Pudong, Shanghai, PR (China)
Viscosity, as a critical property closely associated with the glass-forming ability of a liquid, has been extensively studied with varying temperatures. However, its pressure dependence has not been well explored yet due to experimental difficulties. Here, we measured the viscosity of a metallic glass-forming liquid, Zr46Cu37.6Ag8.4Al8, at pressures up to 6.1 GPa above the melting points by falling-sphere viscometry with ultrafast synchrotron x-ray imaging. Overall, the viscosity increases with pressure, while surprisingly, there is an abrupt drop between 3.2 GPa and 3.7 GPa, indicating the possible existence of a pressure-induced liquid-to-liquid transition. Pressure could change the short- and medium-range orders in the multicomponent glass-forming liquid, as suggested by the different crystalline outcomes after cooling to room temperature at high- and low-pressure ranges. In conclusion, our work extended the viscosity investigation of metallic glass-forming liquids to the high-pressure regime, which will expand our understanding of liquid-liquid transitions and metallic glass formation.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Natural Science Foundation of China; Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments; Shanghai Science and Technology Committee; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2423734
Journal Information:
Journal of Non-Crystalline Solids, Journal Name: Journal of Non-Crystalline Solids Vol. 615; ISSN 0022-3093
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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