About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
Coarsening Kinetics in Surface-doped Nanoporous Metals |
Author(s) |
Luis Granadillo, Ian McCue |
On-Site Speaker (Planned) |
Luis Granadillo |
Abstract Scope |
Due to nanometer-scale features and high surface areas, nanoporous metals have the potential to be extremely radiation tolerant. However, these materials have intrinsically metastable morphologies and will degrade via coarsening during service. One potential mitigation strategy is to introduce impurities on the metal surface that inhibit diffusional transport – analogous to Zener pinning. While there have been a few instances of utilizing this strategy to improve morphological stability, there are no guiding principles regarding what fraction of impurities are required. To elucidate the relationship between impurity concentration and coarsening rate, we investigated the impact of trace surface dopants on the kinetics of coarsening in a nanoporous metal via kinetic Monte Carlo simulations. By applying kinetic analysis methods, we determined how the coarsening rate and rate-limiting site density was impacted by trace impurities. Insights from this work will have a measurable impact on the effort to develop morphologically stable nanostructure materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Nuclear Materials, Thin Films and Interfaces |