About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Tribology: Advances in Friction, Wear and Lubrication of Interfaces
|
| Presentation Title |
A Detailed Study of Water and Molybdenum Disulfide |
| Author(s) |
Michael Chandross, Scott Bobbitt, Tomas Babuska, John Curry |
| On-Site Speaker (Planned) |
Michael Chandross |
| Abstract Scope |
Molybdenum disulfide is a lamellar solid widely used as a solid lubricant in vacuum or other dry environments. The initial stages of sliding, (i.e., run-in), are crucial for the development of low friction films, but exposure to water significantly degrades the tribological response. Defect sites provide locations for chemical reactions with environmental species such as oxygen and water. We present the results of detailed simulations that study the binding of these species on pure and defective MoS2, and the ultimate effects on the tribological properties. Our results show that a major effect of the environmental species is the interruption of inter-flake bonding during run-in. We will also show calculated adsorption isotherms that give detailed information about the relationship between the ambient humidity in realistic atmospheres and the saturation of defect sites with water. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 (SAND2022-1056 A). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Mechanical Properties, Modeling and Simulation |