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<identifier>oai:HAL:hal-00407634v1</identifier>
<datestamp>2018-01-11</datestamp>
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<metadata><dc>
<publisher>HAL CCSD</publisher>
<title lang=en>Stress-enhanced ion diffusion at the vicinity of a crack tip as evidenced by atomic force microscopy in silicate glasses</title>
<creator>Celarie, F.</creator>
<creator>Ciccotti, M.</creator>
<creator>Marliere, Christian</creator>
<contributor>nstitute of Non-Metallic Materials, Clausthal-Zellerfeld ; Université du Québec</contributor>
<contributor>Laboratoire des colloïdes, verres et nanomatériaux (LCVN) ; Université Montpellier 2 - Sciences et Techniques (UM2) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<source>ISSN: 0022-3093</source>
<source>Journal of Non-Crystalline Solids</source>
<publisher>Elsevier</publisher>
<identifier>hal-00407634</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00407634</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00407634</source>
<source>Journal of Non-Crystalline Solids, Elsevier, 2007, 353 (1), pp.51-68. 〈10.1016/j.jnoncrysol.2006.09.034〉</source>
<identifier>DOI : 10.1016/j.jnoncrysol.2006.09.034</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jnoncrysol.2006.09.034</relation>
<language>en</language>
<subject lang=en>silicate glasses</subject>
<subject lang=en>crack</subject>
<subject lang=en>stress-enhanced ion</subject>
<subject>[PHYS.MECA.SOLID] Physics [physics]/Mechanics [physics]/Mechanics of the solides [physics.class-ph]</subject>
<subject>[SPI.MECA.SOLID] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of the solides [physics.class-ph]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>The slow advance of a crack in soda-silicate glasses was studied at nanometer scale by in-situ and real-time atomic force microscopy (AFM) in a well-controlled atmosphere. An enhanced diffusion of sodium ions in the stress-gradient field at the sub-micrometric vicinity of the crack tip was revealed through several effects: growth of nodules in AFM height images, changes in the AFM tip–sample energy dissipation. The nodules patterns revealed a dewetting phenomenon evidenced by ‘breath figures'. Complementary chemical micro-analyses were done. These experimental results were explained by a two-step process: (i) a fast migration (typical time: few milliseconds) of sodium ions towards the fracture surfaces as proposed by Langford et al. [J. Mat. Res. 6 (1991) 1358], (ii) a slow backwards diffusion of the cations as evidenced in these AFM experiments (typical time: few minutes). Measurements of the diffusion coefficient of that relaxing process were done at room temperature. Our results strengthen the theoretical concept of a near-surface structural relaxation due to the stress-gradient at the vicinity of the crack tip. The inhomogeneous migration of sodium ions might be a direct experimental evidence of the presence of sodium-rich channels in the silicate structure [A. Meyer et al., Phys. Rev. Let. 93 (2004) 027801].</description>
<date>2007</date>
</dc>
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