Effect of Water on the Inert Strength of Silica Glass: Role of Water Penetration
Article first published online: 5 NOV 2012
Published 2012. This article is a U.S. Government work and is in the public domain in the USA.
Journal of the American Ceramic Society
Volume 95, Issue 12, pages 3847–3853, December 2012
How to Cite
Fett, T., Rizzi, G., Hoffmann, M. J., Wagner, S., Wiederhorn, S. M. (2012), Effect of Water on the Inert Strength of Silica Glass: Role of Water Penetration. Journal of the American Ceramic Society, 95: 3847–3853. doi: 10.1111/jace.12041
- Issue published online: 5 DEC 2012
- Article first published online: 5 NOV 2012
- Manuscript Accepted: 19 SEP 2012
- Manuscript Received: 30 MAY 2012
The effect of water diffusion on the strength of silica glass is discussed. When silica glass is immersed in hot water and held there for an extended period, its strength increases over that of freshly damaged glass. We propose that this increase in strength is due to water diffusion into exposed surfaces of the test specimen, resulting in swelling of the glass and a fracture mechanics shielding of cracks present in the glass surface. In the present paper, we show that the shielding may be broken down into two parts, that associated with the crack itself and that associated with the free surface of the specimen. The explanation proposed here has been neglected in earlier studies. The approach allows us to obtain a reasonable quantitative explanation for the strengthening of silica glass by soaking in hot water.