| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Coatings to Protect Materials from Extreme Environments
|
| Presentation Title |
Self-generated Tribo-coatings on Glass from Nano-dispersions in Aqueous Medium |
| Author(s) |
Sourav Sahoo, Om P. Khatri, N. M. Anoop Krishnan, Nitya Nand Gosvami |
| On-Site Speaker (Planned) |
Sourav Sahoo |
| Abstract Scope |
Glasses are constantly subjected to scratch-induced damage, which significantly reduces the surface integrity leading to failure. Here, we show that the interfacial friction on glasses during sliding in an aqueous medium can be significantly reduced using nano-dispersions. To this extent, the tribological generation of protective coatings during sliding of a spherical alumina probe over fused silica glass surface in an aqueous environment containing various nano-dispersions at ambient temperatures is investigated in this study. Such tribo-coatings are observed to reduce the shear-induced tensile stresses determining the initiation of partial Hertzian cone cracks. Micro-Raman spectroscopy analysis confirms the deposition of dense films derived from the dispersions within the wear track. The optical and SEM micrographs display clear differences in the crack density and severity of sliding with and without the presence of the tribo-coatings. The results provide new insights into the scratch-induced surface damage mechanisms of glasses in the presence of nano-dispersions. |