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Relaxation oscillation of borosilicate glasses in supercooled liquid region

Most supercooled non-polymeric glass-forming melts exhibit a shear thinning phenomenon, i.e., viscosity decreases with increasing the strain rate. On compressing borosilicate glasses at high temperature, however, we discovered an interesting oscillatory viscous flow and identified it as a typical re...

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Detalles Bibliográficos
Autores principales: Liu, W. D., Zhang, L. C., Mylvaganam, K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5696471/
https://www.ncbi.nlm.nih.gov/pubmed/29158539
http://dx.doi.org/10.1038/s41598-017-16079-w
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author Liu, W. D.
Zhang, L. C.
Mylvaganam, K.
author_facet Liu, W. D.
Zhang, L. C.
Mylvaganam, K.
author_sort Liu, W. D.
collection PubMed
description Most supercooled non-polymeric glass-forming melts exhibit a shear thinning phenomenon, i.e., viscosity decreases with increasing the strain rate. On compressing borosilicate glasses at high temperature, however, we discovered an interesting oscillatory viscous flow and identified it as a typical relaxation oscillation caused by the peculiar structure of borosilicate glass. Specifically, the micro-structure of borosilicate glass can be divided into borate network and silicate network. Under loading, deformation is mainly localized in the borate network via a transformation from the three coordinated planar boron to trigonal boron that could serve as a precursor for the subsequent formation of a BO(4) tetrahedron, while the surrounding silicate network is acting as a stabilization/relaxation agent. The formation of stress oscillation was further described and explained by a new physics-based constitutive model.
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spelling pubmed-56964712017-11-29 Relaxation oscillation of borosilicate glasses in supercooled liquid region Liu, W. D. Zhang, L. C. Mylvaganam, K. Sci Rep Article Most supercooled non-polymeric glass-forming melts exhibit a shear thinning phenomenon, i.e., viscosity decreases with increasing the strain rate. On compressing borosilicate glasses at high temperature, however, we discovered an interesting oscillatory viscous flow and identified it as a typical relaxation oscillation caused by the peculiar structure of borosilicate glass. Specifically, the micro-structure of borosilicate glass can be divided into borate network and silicate network. Under loading, deformation is mainly localized in the borate network via a transformation from the three coordinated planar boron to trigonal boron that could serve as a precursor for the subsequent formation of a BO(4) tetrahedron, while the surrounding silicate network is acting as a stabilization/relaxation agent. The formation of stress oscillation was further described and explained by a new physics-based constitutive model. Nature Publishing Group UK 2017-11-20 /pmc/articles/PMC5696471/ /pubmed/29158539 http://dx.doi.org/10.1038/s41598-017-16079-w Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Liu, W. D.
Zhang, L. C.
Mylvaganam, K.
Relaxation oscillation of borosilicate glasses in supercooled liquid region
title Relaxation oscillation of borosilicate glasses in supercooled liquid region
title_full Relaxation oscillation of borosilicate glasses in supercooled liquid region
title_fullStr Relaxation oscillation of borosilicate glasses in supercooled liquid region
title_full_unstemmed Relaxation oscillation of borosilicate glasses in supercooled liquid region
title_short Relaxation oscillation of borosilicate glasses in supercooled liquid region
title_sort relaxation oscillation of borosilicate glasses in supercooled liquid region
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5696471/
https://www.ncbi.nlm.nih.gov/pubmed/29158539
http://dx.doi.org/10.1038/s41598-017-16079-w
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