About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VII
|
Presentation Title |
Operational and Environmental Conditions Regulate the Nanoscale Frictional Behavior of Two-dimensional Materials |
Author(s) |
Frank W. DelRio, Bien-Cuong Tran-Khac, Hyun-Joon Kim, Koo-Hyun Chung |
On-Site Speaker (Planned) |
Frank W. DelRio |
Abstract Scope |
The friction characteristics of atomically-thin h-BN, MoS2, and graphene were systematically investigated via friction force microscopy measurements at various operational (e.g., normal force and sliding speed) and environmental (e.g., relative humidity and thermal annealing) conditions. As normal force increased, the friction results indicated three different phases in surface damage evolution – an elastic regime with no changes in topography and friction, a plastic regime with notable changes in topography and friction and a delamination regime. The speed-dependent friction measurements similarly demonstrated two regimes – a logarithmic increase regime at smaller speeds and a plateau regime at larger speeds. Finally, friction was found to increase with humidity and decrease with annealing; the trends were attributed to the diffusion of water molecules, leading to an increase in the puckering effect and interaction potential corrugation. Overall, the findings enable a mechanistic understanding of friction characteristics for several classes of two-dimensional materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Thin Films and Interfaces, Nanotechnology |