| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kim, Seong H.
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Topics
Publications (6/6 displayed)
- 2023A tag-and-count approach for quantifying surface silanol densities on fused silica based on atomic layer deposition and high-sensitivity low-energy ion scatteringcitations
- 2021Effects of acid leaching treatment of soda lime silicate glass on crack initiation and fracturecitations
- 2021Effects of Al:Si and (Al + Na):Si ratios on the properties of the international simple glass, part II: Structurecitations
- 2020Near-field corrosion interactions between glass and corrosion resistant alloyscitations
- 2019Differences in surface failure modes of soda lime silica glass under normal indentation versus tangential shear: A comparative study on Na<sup>+</sup>/K<sup>+</sup>‐ion exchange effectscitations
- 2019Statistical Mechanical Model of Topological Fluctuations and the Intermediate Phase in Binary Phosphate Glassescitations
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article
Differences in surface failure modes of soda lime silica glass under normal indentation versus tangential shear: A comparative study on Na<sup>+</sup>/K<sup>+</sup>‐ion exchange effects
Abstract
<jats:title>Abstract</jats:title><jats:p>The effects of exchanging Na<jats:sup>+</jats:sup> with K<jats:sup>+</jats:sup> on the mechanical and mechanochemical properties of a soda lime silica (<jats:styled-content style="fixed-case">SLS</jats:styled-content>) glass were investigated. It is known that replacing smaller modifier ions with bigger ions in the silicate glass network, at temperatures below the glass transition (T<jats:sub>g</jats:sub>), produces a compressive stress in the subsurface region that enhances resistance to mechanical damages. This study found that when Na<jats:sup>+</jats:sup> ions in <jats:styled-content style="fixed-case">SLS</jats:styled-content> are exchanged with K<jats:sup>+</jats:sup> ions at 400°C, the hardness, indentation fracture toughness, and crack initiation load of the surface are increased, which is consistent with the chemical strengthening effect. However, the resistance to mechanochemical wear in a near‐saturation humidity condition (relative humidity <jats:styled-content style="fixed-case">RH</jats:styled-content> = 90%) is deteriorated. When K<jats:sup>+</jats:sup> ions are exchanged back with Na<jats:sup>+</jats:sup> ions at 350°C, the wear resistance in high humidity conditions is recovered. These results indicate that the improvement of mechanical properties under indentation normal to the surface is irrelevant with the resistance to mechanochemical wear under tangential shear at the surface. Based on the analysis of the surface chemical composition, silicate network structure, and hydrogen‐bonding interactions of hydrous species in the subsurface region, it is proposed that the leachable Na<jats:sup>+</jats:sup> associated with non‐bridging oxygen and subsurface hydrous species in the silicate network play more important roles in the mechanochemical wear of <jats:styled-content style="fixed-case">SLS</jats:styled-content> at high <jats:styled-content style="fixed-case">RH</jats:styled-content>.</jats:p>