@article{f31386bc65ea45af8d7dacef349e4d97,
title = "Influence of acid leaching surface treatment on indentation cracking of soda lime silicate glass",
abstract = "Past work has shown that water or acid soaking treatments can increase the mechanical strength of soda lime silicate (SLS) glasses. In this work, we show that acid leaching treatments result in an increase in the apparent crack resistance of the acid-leached surface of SLS glass during indentation. Vickers indentation tests in controlled environments show a humidity dependence of radial cracking, suggesting that the transport of water through the leached layer plays a critical role in the propagation of cracks to the glass surface. Molecular dynamics simulations with reactive force fields indicate that the leached surface layer can undergo pressure-induced mechanochemical reactions during indentation, which increases the bridging oxygen connectivity in the silica network of the leached layer. Such structural changes can hinder transport of water molecules from the environment to the subsurface crack tip. Based on experimental observations and simulation results, a new hypothesis is proposed that mechanochemical restructuring in the leached layer in response to the applied load may lower the transport kinetics of molecular water to critical flaws, resulting in an apparent enhancement in the crack resistance of the acid-leached surface of SLS glass.",
author = "Nisha Sheth and Hahn, {Seung Ho} and Dien Ngo and Alexandra Howzen and Raul Bermejo and {van Duin}, {Adri C.T.} and Mauro, {John C.} and Pantano, {Carlo G.} and Kim, {Seong H.}",
note = "Funding Information: This work was supported by the Usable Glass Strength Coalition (UGSC) and the National Science Foundation USA (DMR-1609107). The SE measurements were performed with the support from the Center for Performance and Design of Nuclear Waste Forms and Containers, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under award #DE-SC0016584. N.S. received the Graduate Research Fellowship from NSF USA (grant no. DGE-1255832). AH received a summer support from Glass Committee of the International Windows Cleaning Association (IWCA). The green bottles used in this study were generously provided by Owens-Illinois Inc. Funding Information: This work was supported by the Usable Glass Strength Coalition (UGSC) and the National Science Foundation USA ( DMR-1609107 ). The SE measurements were performed with the support from the Center for Performance and Design of Nuclear Waste Forms and Containers, an Energy Frontier Research Center funded by the U.S. Department of Energy , Office of Science , Basic Energy Sciences under award #DE-SC0016584. N.S. received the Graduate Research Fellowship from NSF USA (grant no. DGE-1255832 ). AH received a summer support from Glass Committee of the International Windows Cleaning Association (IWCA). The green bottles used in this study were generously provided by Owens-Illinois Inc. Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",
year = "2020",
month = sep,
day = "1",
doi = "10.1016/j.jnoncrysol.2020.120144",
language = "English (US)",
volume = "543",
journal = "Journal of Non-Crystalline Solids",
issn = "0022-3093",
publisher = "Elsevier",
}