Insight into the Interaction between Water and Ion-Exchanged Aluminosilicate Glass by Nanoindentation

Abstract

This work aims to explore the interaction between water and ion-exchanged aluminosilicate glass. The surface mechanical properties of ion-exchanged glasses after different hydration durations are investigated. The compressive stress and depth of stress layer are determined with a surface stress meter on the basis of photo-elasticity theory. The hardness and Young’s modulus are tested through nanoindentation. Infrared spectroscopy is used to determine the variation in surface structures of the glass samples. The results show that hydration has obvious effects on the hardness and Young’s modulus of the raw and ion-exchanged glasses. The hardness and Young’s modulus decrease to different extents after different hydration times, and the Young’s modulus shows some recovery with the prolonging of hydration time. The ion-exchanged glasses are more resistant to hydration. The tin side is more resistant to hydration than the air side. The results are expected to serve as reference for better understanding the hydration process of ion-exchanged glass.

Surface Hardness and Abrasion Threshold of Chemically Strengthened Soda-Lime Silicate Glasses After Steam Processing

“…While the detailed mechanism of surface softening in steam-treated IOX glass remains unresolved, it is clearly associated with stress relaxation [29], [52], proton exchange reactions leading to reduced stuffing levels [48], [49], [53] and indeed hydration of the top surface [45], [51], [54], [55]. As a result, autoclave steam-treatment presents a way to partially compensate the enhanced surface brittleness accompanying IOX.…”

“…2B; the average scattered intensity S is estimated for the visible spectral range of 400-800 nm via S = 1-T-R, with direct optical transmittance T and specular reflection R). Both, steam treatment and weathering in the climate control chamber, result in higher surface roughness in SLS glass [6], [44], [45]. For the IOX glass, this effect is much weaker, assumedly as a result of improved resistance to surface degradation following potassium-for-sodium exchange and the higher solubility of potassium carbonates in water.…”

Compositional changes by SIMS and XPS analyses on fresh and aged Roman-like glass

“…6) because, in addition to the main component related to adventitious carbon contamination usually falling in a wide range of BE (roughly between 284-286 eV [21,22]; in our It is well-known that humid air and water are the first cause of degradation of glass, inducing a decrease in alkali ion concentration and increasing the local pH value (see, for instance, [12,28,29]). Considering the XPS experimental findings in this work, we suggest the following possible corrosion mechanism starting at the glass surface and involving water and CO 2 from the atmosphere, in addition to H + ↔Na + ion exchange at the first few nm of the sample surface [30,31]:…”