Cover Image

Impact of High Pressure on Reversible Structural Relaxation of Metallic Glass

The temperature dependence of the reversible structural relaxation time and diffusion constant of metallic glasses under pressure is theoretically investigated. The compression not only changes the glassy dynamics, but also generates a metastable state along with a higher-energy state where the syst...

Full description

Saved in:
Bibliographic Details
Main Authors: Nguyen K. Ngan, Anh D. Phan, Alessio Zaccone
Format: Bài trích
Language:eng
Published: Rapid Research Letter 2021
Online Access:https://onlinelibrary.wiley.com/doi/10.1002/pssr.202100235
https://dlib.phenikaa-uni.edu.vn/handle/PNK/2829
https://doi.org/10.1002/pssr.202100235
Tags: Add Tag
No Tags, Be the first to tag this record!
id oai:localhost:PNK-2829
record_format dspace
spelling oai:localhost:PNK-28292022-08-17T05:54:46Z Impact of High Pressure on Reversible Structural Relaxation of Metallic Glass Nguyen K. Ngan Anh D. Phan Alessio Zaccone The temperature dependence of the reversible structural relaxation time and diffusion constant of metallic glasses under pressure is theoretically investigated. The compression not only changes the glassy dynamics, but also generates a metastable state along with a higher-energy state where the system can rejuvenate. The relaxation times for forward and backward transitions in this two-state system are nearly identical and much faster than the relaxation time without accounting for barrier recrossing. At ambient pressure, the expected irreversible relaxation process is recovered, and the numerical results agree well with prior experimental results. An increase in pressure has a minor effect on the relaxation time and diffusion constant that one computes without considering the influence of the metastable state, but it leads to a large reduction of the reversible relaxation time computed upon considering the metastable state. The presence of external compression is also shown to trigger a fragile-to-strong crossover in metallic glasses. 2021-09-13T04:24:48Z 2021-09-13T04:24:48Z 2021 Bài trích https://onlinelibrary.wiley.com/doi/10.1002/pssr.202100235 https://dlib.phenikaa-uni.edu.vn/handle/PNK/2829 https://doi.org/10.1002/pssr.202100235 eng Rapid Research Letter
institution Digital Phenikaa
collection Digital Phenikaa
language eng
description The temperature dependence of the reversible structural relaxation time and diffusion constant of metallic glasses under pressure is theoretically investigated. The compression not only changes the glassy dynamics, but also generates a metastable state along with a higher-energy state where the system can rejuvenate. The relaxation times for forward and backward transitions in this two-state system are nearly identical and much faster than the relaxation time without accounting for barrier recrossing. At ambient pressure, the expected irreversible relaxation process is recovered, and the numerical results agree well with prior experimental results. An increase in pressure has a minor effect on the relaxation time and diffusion constant that one computes without considering the influence of the metastable state, but it leads to a large reduction of the reversible relaxation time computed upon considering the metastable state. The presence of external compression is also shown to trigger a fragile-to-strong crossover in metallic glasses.
format Bài trích
author Nguyen K. Ngan
Anh D. Phan
Alessio Zaccone
spellingShingle Nguyen K. Ngan
Anh D. Phan
Alessio Zaccone
Impact of High Pressure on Reversible Structural Relaxation of Metallic Glass
author_facet Nguyen K. Ngan
Anh D. Phan
Alessio Zaccone
author_sort Nguyen K. Ngan
title Impact of High Pressure on Reversible Structural Relaxation of Metallic Glass
title_short Impact of High Pressure on Reversible Structural Relaxation of Metallic Glass
title_full Impact of High Pressure on Reversible Structural Relaxation of Metallic Glass
title_fullStr Impact of High Pressure on Reversible Structural Relaxation of Metallic Glass
title_full_unstemmed Impact of High Pressure on Reversible Structural Relaxation of Metallic Glass
title_sort impact of high pressure on reversible structural relaxation of metallic glass
publisher Rapid Research Letter
publishDate 2021
url https://onlinelibrary.wiley.com/doi/10.1002/pssr.202100235
https://dlib.phenikaa-uni.edu.vn/handle/PNK/2829
https://doi.org/10.1002/pssr.202100235
_version_ 1751856264503099392
score 8.891053

Similar Items