About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Chemistry and Physics of Interfaces
|
Presentation Title |
Tribochemistry: How Evolving Chemistry, Structure and Composition Dynamically Change the Properties of Solid Materials in Unlubricated Sliding Interfaces |
Author(s) |
Brandon Krick |
On-Site Speaker (Planned) |
Brandon Krick |
Abstract Scope |
Surfaces are well known to be energetically less stable than bulk materials. Contact and sliding-induced shear stresses of tribological interfaces result in extreme conditions which can cause the surfaces to react with each other, react with the environment and reconfigure – a process known as tribochemistry. Tribochemical interactions result in a dynamically evolving surface composition, which, in turn, results in evolving surface properties. Sometimes, these interactions result in unexpectedly remarkable properties, as is the case for ultralow wear rate in certain PTFE-based composites or extraordinarily low friction coefficients of MoS2 and some carbon-catalyzing coatings. In most cases, these processes are the result of unpredicted exceptions to the “rules” of solid lubricants. Here, we present the case of tribochemistry for several solid lubricant materials, with the aims of understanding new design rules for ultralow wear and low friction materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Thin Films and Interfaces, Surface Modification and Coatings, Mechanical Properties |