Relaxation study of pre-densified silica glasses under 2.5 MeV electron irradiation

Abstract We examined the “relaxation properties” of pre-densified synthetic fused silica glass under 2.5 MeV electron irradiation. The densification of the glass was either obtained by hot compression (5 GPa-350 °C and 5 GPa-1000 °C) or via a thermal treatment increasing its fictive temperature (Tf ...

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Autores principales:	Nadège Ollier, Matthieu Lancry, Christine Martinet, Valérie Martinez, Sylvie Le Floch, Daniel Neuville
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e40bf5b7a9544ad2a811a8c7007482db
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spelling	oai:doaj.org-article:e40bf5b7a9544ad2a811a8c7007482db2021-12-02T16:08:44ZRelaxation study of pre-densified silica glasses under 2.5 MeV electron irradiation10.1038/s41598-018-37751-92045-2322https://doaj.org/article/e40bf5b7a9544ad2a811a8c7007482db2019-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-37751-9https://doaj.org/toc/2045-2322Abstract We examined the “relaxation properties” of pre-densified synthetic fused silica glass under 2.5 MeV electron irradiation. The densification of the glass was either obtained by hot compression (5 GPa-350 °C and 5 GPa-1000 °C) or via a thermal treatment increasing its fictive temperature (Tf = 1050, 1250 and 1400 °C). Under irradiation, the pre-densified silica glasses exhibit a relaxation of their macroscopic density with increasing integrated dose. Density was reduced for hot compressed silica and increased for Tf samples with different relaxation rates but it is remarkable that all sample densities follow a trend towards the same equilibrium value around 2.26 for a dose larger than 10 GGy despite a different final topology. After irradiation of hot compressed silica, the Raman spectra display a significant increment of 4 and almost 3-membered rings whereas they exhibit a glass density reduction; demonstrating that a D2 band increase cannot be considered as an absolute marker of the glass compaction. The correlation between density and D2 intensity remains valid until silica density remains lower than 2.26. In contrast, the FWHM of the main band peaking at 440 cm−1 appears to remain correlated to the silica glass density for all investigated samples.Nadège OllierMatthieu LancryChristine MartinetValérie MartinezSylvie Le FlochDaniel NeuvilleNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-8 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nadège Ollier Matthieu Lancry Christine Martinet Valérie Martinez Sylvie Le Floch Daniel Neuville Relaxation study of pre-densified silica glasses under 2.5 MeV electron irradiation
description	Abstract We examined the “relaxation properties” of pre-densified synthetic fused silica glass under 2.5 MeV electron irradiation. The densification of the glass was either obtained by hot compression (5 GPa-350 °C and 5 GPa-1000 °C) or via a thermal treatment increasing its fictive temperature (Tf = 1050, 1250 and 1400 °C). Under irradiation, the pre-densified silica glasses exhibit a relaxation of their macroscopic density with increasing integrated dose. Density was reduced for hot compressed silica and increased for Tf samples with different relaxation rates but it is remarkable that all sample densities follow a trend towards the same equilibrium value around 2.26 for a dose larger than 10 GGy despite a different final topology. After irradiation of hot compressed silica, the Raman spectra display a significant increment of 4 and almost 3-membered rings whereas they exhibit a glass density reduction; demonstrating that a D2 band increase cannot be considered as an absolute marker of the glass compaction. The correlation between density and D2 intensity remains valid until silica density remains lower than 2.26. In contrast, the FWHM of the main band peaking at 440 cm−1 appears to remain correlated to the silica glass density for all investigated samples.
format	article
author	Nadège Ollier Matthieu Lancry Christine Martinet Valérie Martinez Sylvie Le Floch Daniel Neuville
author_facet	Nadège Ollier Matthieu Lancry Christine Martinet Valérie Martinez Sylvie Le Floch Daniel Neuville
author_sort	Nadège Ollier
title	Relaxation study of pre-densified silica glasses under 2.5 MeV electron irradiation
title_short	Relaxation study of pre-densified silica glasses under 2.5 MeV electron irradiation
title_full	Relaxation study of pre-densified silica glasses under 2.5 MeV electron irradiation
title_fullStr	Relaxation study of pre-densified silica glasses under 2.5 MeV electron irradiation
title_full_unstemmed	Relaxation study of pre-densified silica glasses under 2.5 MeV electron irradiation
title_sort	relaxation study of pre-densified silica glasses under 2.5 mev electron irradiation
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/e40bf5b7a9544ad2a811a8c7007482db
work_keys_str_mv	AT nadegeollier relaxationstudyofpredensifiedsilicaglassesunder25mevelectronirradiation AT matthieulancry relaxationstudyofpredensifiedsilicaglassesunder25mevelectronirradiation AT christinemartinet relaxationstudyofpredensifiedsilicaglassesunder25mevelectronirradiation AT valeriemartinez relaxationstudyofpredensifiedsilicaglassesunder25mevelectronirradiation AT sylvielefloch relaxationstudyofpredensifiedsilicaglassesunder25mevelectronirradiation AT danielneuville relaxationstudyofpredensifiedsilicaglassesunder25mevelectronirradiation
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Relaxation study of pre-densified silica glasses under 2.5 MeV electron irradiation

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