TY - JOUR

T1 - Effects of acid leaching treatment of soda lime silicate glass on crack initiation and fracture

AU - Sheth, Nisha

AU - Greenly, Carl

AU - Bermejo, Raul

AU - Mauro, John C.

AU - Pantano, C.G.

AU - Kim, Seong H.

N1 - Publisher Copyright: © 2021 The American Ceramic Society

PY - 2021/9

Y1 - 2021/9

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85106740162&partnerID=8YFLogxK

U2 - 10.1111/jace.17840

DO - 10.1111/jace.17840

M3 - Article

VL - 104.2021

SP - 4550

EP - 4558

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 9

ER -