About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Tribology: Advances in Friction, Wear and Lubrication of Interfaces
|
| Presentation Title |
Evaluating the Frictional Performance of Carbon Coatings Applied to Ni-Invar and Ti-6Al-4V Alloys |
| Author(s) |
Fatemeh Ghajari, Mobin Vandadi, Nima Rahbar |
| On-Site Speaker (Planned) |
Fatemeh Ghajari |
| Abstract Scope |
Sustainable carbon coatings were deposited on Ni-Invar and Ti-6Al-4V using pack carburization with cassava leaves. Ni-Invar developed turbostratic multilayer graphene, exhibiting ultra-low coefficients of friction (0.08 macro-scale, 0.0033 nano-scale). Ti-6Al-4V formed disordered carbon structures rich in titanium carbide, resulting in higher friction (0.1 macro-scale, 0.0147 nano-scale). Monte Carlo simulations showed island growth on Ni-Invar due to strong carbon-carbon interactions, while Ti-6Al-4V exhibited uniform growth from stronger carbon-substrate affinity. DFT calculations confirmed Ti's strong affinity for graphene (−1.1440×10^3 eV), contrasting with Ni and Fe's stronger self-affinity. These findings underscore the critical role of substrate chemistry in carbon coating morphology and tribological behavior, highlighting Ni-Invar's potential for superlubricity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Surface Modification and Coatings, Thin Films and Interfaces |