Abstract
Stress corrosion of glass proceeds with a chemical process which involves a stress enhanced chemical reaction between the reactant species and the highly stressed glass surface near the crack tip. In this paper, effect of surface charge formed at the glass/solution interface on subcritical crack growth was investigated in order to elucidate the mechanism of the stress corrosion of glass. Post-indentation slow crack growth in soda-lime silica glass in various aqueous RNO3(R; Li+,Na+,K+,Rb+) solutions was observed by measuring the crack length with time after indentation. The crack growth was found to depend on the pH, the concentration, and the nature of electrolytes. These behaviors suggested that the surface charge density which was controlled by the chemical composition of the solution affected the subcritical crack growth. In the pH range above 10 where the dissolution of the glass markedly occured, crack growth also depended on the surfece charge.
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