Back to Search Start Over

Structural rejuvenation of a well-aged metallic glass.

Authors :
Yang Gao
Cheng Yang
Gan Ding
Lan-Hong Dai
Min-Qiang Jiang
Source :
Fundamental Research. Sep2024, Vol. 4 Issue 5, p1266-1271. 6p.
Publication Year :
2024

Abstract

Rejuvenation of glassy structures in general is characterized by the exothermic enthalpy prior to the glass transition. In the present work, we find that this situation is not applicable to a heavily-aged Zr-based metallic glass that rejuvenates by anelastic deformation before yield. Instead, its rejuvenation can be precisely captured by the low-temperature boson heat capacity peak as well as the effective enthalpy change with the glass-to-liquid transition. These results demonstrate that a structurally stable glass could rejuvenate by decreasing mechanical stability of its basin of potential energy landscape, but without changing the basin's energy level. The underlying mechanism points toward the redistribution of the atomic free volume with a constant system-averaged value. We further find that the rejuvenation limit of this glass is its steady-flow state with self-similar inherent structures at both short- and long-time scales. Our findings refresh the understanding of glass rejuvenation and suggest that the boson peak is a better probe for the structural rejuvenation of glasses. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20969457
Volume :
4
Issue :
5
Database :
Academic Search Index
Journal :
Fundamental Research
Publication Type :
Academic Journal
Accession number :
180312285
Full Text :
https://doi.org/10.1016/j.fmre.2022.12.004