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Observation of cavitation governing fracture in glasses

Crack propagation is the major vehicle for material failure, but the mechanisms by which cracks propagate remain longstanding riddles, especially for glassy materials with a long-range disordered atomic structure. Recently, cavitation was proposed as an underlying mechanism governing the fracture of...

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Autores principales: Shen, Lai-Quan, Yu, Ji-Hao, Tang, Xiao-Chang, Sun, Bao-An, Liu, Yan-Hui, Bai, Hai-Yang, Wang, Wei-Hua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8011974/
https://www.ncbi.nlm.nih.gov/pubmed/33789905
http://dx.doi.org/10.1126/sciadv.abf7293
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author Shen, Lai-Quan
Yu, Ji-Hao
Tang, Xiao-Chang
Sun, Bao-An
Liu, Yan-Hui
Bai, Hai-Yang
Wang, Wei-Hua
author_facet Shen, Lai-Quan
Yu, Ji-Hao
Tang, Xiao-Chang
Sun, Bao-An
Liu, Yan-Hui
Bai, Hai-Yang
Wang, Wei-Hua
author_sort Shen, Lai-Quan
collection PubMed
description Crack propagation is the major vehicle for material failure, but the mechanisms by which cracks propagate remain longstanding riddles, especially for glassy materials with a long-range disordered atomic structure. Recently, cavitation was proposed as an underlying mechanism governing the fracture of glasses, but experimental determination of the cavitation behavior of fracture is still lacking. Here, we present unambiguous experimental evidence to firmly establish the cavitation mechanism in the fracture of glasses. We show that crack propagation in various glasses is dominated by the self-organized nucleation, growth, and coalescence of nanocavities, eventually resulting in the nanopatterns on the fracture surfaces. The revealed cavitation-induced nanostructured fracture morphologies thus confirm the presence of nanoscale ductility in the fracture of nominally brittle glasses, which has been debated for decades. Our observations would aid a fundamental understanding of the failure of disordered systems and have implications for designing tougher glasses with excellent ductility.
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spelling pubmed-80119742021-04-13 Observation of cavitation governing fracture in glasses Shen, Lai-Quan Yu, Ji-Hao Tang, Xiao-Chang Sun, Bao-An Liu, Yan-Hui Bai, Hai-Yang Wang, Wei-Hua Sci Adv Research Articles Crack propagation is the major vehicle for material failure, but the mechanisms by which cracks propagate remain longstanding riddles, especially for glassy materials with a long-range disordered atomic structure. Recently, cavitation was proposed as an underlying mechanism governing the fracture of glasses, but experimental determination of the cavitation behavior of fracture is still lacking. Here, we present unambiguous experimental evidence to firmly establish the cavitation mechanism in the fracture of glasses. We show that crack propagation in various glasses is dominated by the self-organized nucleation, growth, and coalescence of nanocavities, eventually resulting in the nanopatterns on the fracture surfaces. The revealed cavitation-induced nanostructured fracture morphologies thus confirm the presence of nanoscale ductility in the fracture of nominally brittle glasses, which has been debated for decades. Our observations would aid a fundamental understanding of the failure of disordered systems and have implications for designing tougher glasses with excellent ductility. American Association for the Advancement of Science 2021-03-31 /pmc/articles/PMC8011974/ /pubmed/33789905 http://dx.doi.org/10.1126/sciadv.abf7293 Text en Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Shen, Lai-Quan
Yu, Ji-Hao
Tang, Xiao-Chang
Sun, Bao-An
Liu, Yan-Hui
Bai, Hai-Yang
Wang, Wei-Hua
Observation of cavitation governing fracture in glasses
title Observation of cavitation governing fracture in glasses
title_full Observation of cavitation governing fracture in glasses
title_fullStr Observation of cavitation governing fracture in glasses
title_full_unstemmed Observation of cavitation governing fracture in glasses
title_short Observation of cavitation governing fracture in glasses
title_sort observation of cavitation governing fracture in glasses
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8011974/
https://www.ncbi.nlm.nih.gov/pubmed/33789905
http://dx.doi.org/10.1126/sciadv.abf7293
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