About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering IX
|
| Presentation Title |
High-Temperature Tribological Performance of Nanodiamond-Reinforced Titanium Coatings Fabricated via Shrouded Plasma Spray |
| Author(s) |
Neha Jha, Dip Prakash Samajdar |
| On-Site Speaker (Planned) |
Neha Jha |
| Abstract Scope |
The tribological limitations of plasma-sprayed titanium coatings restrict their application in demanding engineering environments. This study investigates the synergistic effect of nanodiamond (ND) reinforcement on the microstructure and tribological performance of titanium coatings fabricated by shrouded plasma spraying. Pure Ti, Ti–0.5D, and Ti–1D coatings were deposited on stainless steel under an inert atmosphere. ND addition improved powder flowability, resulting in uniform deposition and reduced porosity. During spraying, in-situ TiC formation and grain refinement enhanced the coating microstructure. Tribological testing demonstrated reduced wear volume and coefficient of friction for Ti–1D compared to pure Ti. Raman spectroscopy, XPS, and TEM confirmed partial ND graphitization, TiC formation, and the development of carbon-rich tribofilms promoting self-lubrication. Elemental mapping further revealed controlled oxidation and reduced material transfer. The combined effects of TiC reinforcement, retained ND, and graphitic tribofilms significantly enhanced the tribological performance of the coatings, demonstrating their potential for aerospace and automotive applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Mechanical Properties, Composites |