T. Rouxel—contributing editor
Influence of Water on Crack Self-Healing in Soda-Lime Silicate Glass
Article first published online: 6 APR 2011
© 2011 The American Ceramic Society
Journal of the American Ceramic Society
Volume 94, Issue 8, pages 2402–2407, August 2011
How to Cite
Girard, R., Faivre, A. and Despetis, F. (2011), Influence of Water on Crack Self-Healing in Soda-Lime Silicate Glass. Journal of the American Ceramic Society, 94: 2402–2407. doi: 10.1111/j.1551-2916.2011.04517.x
- Issue published online: 9 AUG 2011
- Article first published online: 6 APR 2011
- Manuscript No. 28973. Received November 26 2010; approved February 15 2011.
The self-healing behavior of radial cracks generated by Vickers indentation in float glass is analyzed when heat treated at 620°C under various atmospheres. Results evidence that two main driving forces influence radial crack evolution: release of residual stresses induced by initial indentation and capillary forces due to surface energy minimization. Depending on the viscosity level, viscous flow allows crack morphological changes driven by capillarity forces or not. Our results evidence that at 620°C, the viscosity of the glass surrounding cracks can be significantly reduced by water diffusion and glass hydrolysis, or increased by glass des-hydration, as a function of the humidity level of the furnace atmosphere. Hydration and des-hydration of glass are shown to play a major role in the crack morphology changes during healing, respectively, favoring or impeding morphological changes driven by capillarity forces.