About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Topological Transitions during Coarsening in Nanoporous Metals |
Author(s) |
Kate L. M. Elder, W. Beck Andrews, Markus Ziehmer, Alexander F. Chadwick, Erica T. Lilleodden, Katsuyo Thornton, Peter W. Voorhees |
On-Site Speaker (Planned) |
Kate L. M. Elder |
Abstract Scope |
Nanoporous metals are prototypical bicontinuous structures, consisting of pores and ligaments, that have a large surface area and coarsen by surface diffusion. Topological transitions, such as particle detachment, during coarsening have a large impact on mechanical properties of the microstructure and can lead to the formation of grain boundaries. Due to the length and time scales involved, most experimental nanoporous metal data is taken ex-situ, not allowing for constant observation of the microstructure during coarsening. An experimentally measured nanoporous gold structure is used as the initial condition for a phase field simulation of coarsening by surface diffusion. This modeling work confirms the presence of topological changes and curvature statistics provide insight into the morphology of the microstructure where a topological change would occur. |
Proceedings Inclusion? |
Planned: |