Effects of acid leaching treatment of soda lime silicate glass on crack initiation and fracture

Nisha Sheth, Carl Greenly, Raul Bermejo, John C. Mauro, Carlo G. Pantano, Seong H. Kim

Research output: Contribution to journalArticleResearchpeer-review


Water or acid soaking surface treatments have been shown to increase the mechanical strength of soda-lime silicate (SLS) glasses. This increase in strength has traditionally been attributed to effects related to residual stress or changes in fracture resistance. In this work, we report experimental data that cannot be explained based on the existing knowledge of glass surface mechanics. In dry environments, annealed and acid-leached SLS surfaces have comparable crack initiation stress and fracture stress as measured by Hertzian indentation and biaxial bending tests, respectively. Yet, in the presence of humidity, acid-leached surfaces have higher failure stress than the annealed surfaces. This apparent enhancement in the crack resistance of the acid-leached surface of SLS glass in humid environments supports the hypothesis that acid-leached surface chemistry can lower the transport kinetics of molecular water to critical flaws.

Original languageEnglish
Pages (from-to)4550-4558
JournalJournal of the American Ceramic Society
Early online date28 May 2021
Publication statusPublished - 2021

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