Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 33, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-648X/abbea4
Keywords
metallic glasses; high pressure; polyamorphism; synchrotron radiation
Categories
Funding
- National Natural Science Foundation of China [11904083/11747078]
- Foundation of He'nan Educational Committee [20A140016]
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The study investigated the structural evolution of Er55Al25Co20 metallic glasses under high pressure using synchrotron radiation. It discovered a reversible polyamorphic transition and irreversible densification of specimens, which was strongly correlated with electronic structural evolution. This research provides new insights into understanding the mechanisms of polyamorphism in metallic glasses.
The structural evolution of Er55Al25Co20 metallic glasses (MGs) at high pressure was studied through x-ray diffraction with synchrotron radiation. The compression ratio, differential structure factor, pair distribution function g(r), and relative resistance as functions of pressure were analyzed and discussed. A reversible polyamorphic transition with a clear hysteresis was detected in the Er55Al25Co20 MGs. The irreversible annihilation of free volume and voids led to a densification of the specimens. Electronic resistance measurements demonstrated that the transition was strongly correlated with the electronic structural evolution. The results provide a new insight into understanding the mechanisms of polyamorphism in MGs.
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