| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thin Films and Coatings: Properties, Processing and Applications
|
| Presentation Title |
Tribosintering of Nanocrystals – Manufacturing Wear-resistant TiO2 Coatings at Ambient Temperature |
| Author(s) |
Pranjal Nautiyal, Michael Moriarty, Parker LaMascus, Andrew Jackson, Robert J Wiacek, Robert W Carpick |
| On-Site Speaker (Planned) |
Pranjal Nautiyal |
| Abstract Scope |
Wear-resistant coatings are required to protect mechanical components from surface-initiated failures at harsh contacts. However, state-of-the-art coating technologies require extreme processing temperatures, inert chambers, or aggressive reactions, which makes them costly, energy-inefficient, and hazardous. Here, we exploit a friction-assisted sintering mechanism, tribosintering, to manufacture wear-resistant coatings on steel at room temperature. A pressurized sliding/rolling contact is run in a processing fluid containing dispersed TiO2 nanocrystals. The nanocrystals sinter on the contacting surfaces, forming surface-bound coatings within minutes. We employed a ball-on-disc tribometer equipped with an optical interferometer to study the deposition and durability of coatings in situ. The coatings sinter over a range of slide-roll-ratios (0 to 50%) representative of the contacts of bearings and gears. They resisted wear in 10-hour durability tests, exhibiting exceptional wear coefficients ~10-19-10-18 m3/N.m. We postulate their extraordinary wear resistance stems from effective sintering densification under compressive and shear stresses over thousands of contact cycles. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Nanotechnology, Mechanical Properties |