About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Tribology: Advances in Friction, Wear and Lubrication of Interfaces
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| Presentation Title |
Macroscale Superlubricity of Graphene-like coatings on selected metallic substrates |
| Author(s) |
Tabiri Kwayie Asumadu, Mobin Vandadi, Desmond Klenam, Kwadwo Adinkrah-Appiah , Emmanuel Gikunoo, Kwadwo Mensah-Darkwa, Samuel Kwofie, Nima Rahbar, Winston Wole Soboyejo |
| On-Site Speaker (Planned) |
Tabiri Kwayie Asumadu |
| Abstract Scope |
Globally, ~100 million terajoule of energy is required to reduce friction, accounting to a fifth of energy generated annually. Variants of Graphene are known to achieve superlubricity at the micron and nano scales. The mechanisms of superlubricity at macroscale is yet to be fully understood. In this work, graphene crystals were deposited on 1045 steel, Ni invar, CP Ti and Ti6Al4V alloys, using a novel low-cost high temperature biowaste treatment at 900oC. Wear and friction behaviour using ball-on-disk configuration on the bulk coated metallic substrates were investigated. The results showed remarkable ~95.20% reduction in coefficient of friction (~0.0015) and ~88% decreased wear rate for substrates treated for 5 hours at 900°C. This was attributed to graphene nanocomposite films that led to multiple micro-contact points for superlubricity. The underlying tribocatalysis and stress induced tribo-transformation interactions are elucidated, before exploring the implications for the design of robust next generation multifunctional carbon-based coatings. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Thin Films and Interfaces, Nanotechnology |