About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Self-organizing Nano-architectured Materials
|
Presentation Title |
Grain Boundary Formation through Particle Detachment during Coarsening of Nanoporous Metals |
Author(s) |
Kate L.M. Elder, W. Beck Andrews, Markus Ziehmer, Alexander Chadwick, Erica Lilleodden, Katsuyo Thornton , Peter W. Voorhees |
On-Site Speaker (Planned) |
Peter W. Voorhees |
Abstract Scope |
Grain boundary formation during coarsening of nanoporous gold (NPG) is investigated wherein a nanocrystalline structure can form by particles detaching and reattaching to the structure. Experiments show that an in-grain orientation spread develops as NPG is coarsened. The volume fraction of the NPG sample is near the limit of bicontinuity, at which simulations predict that a bicontinuous structure begins to fragment into independent particles during coarsening. We predict that up to ~5% of the NPG structure detaches during coarsening. The total volume detached is highly dependent on the volume fraction and volume fraction homogeneity of the nanostructure. As the void phase in the experiments cannot support independent particles, they must fall and reattach to the structure, a process that results in the formation of new grain boundaries. This particle reattachment process, along with other classical processes, leads to the formation of grain boundaries during coarsening in nanoporous metals. |
Proceedings Inclusion? |
Undecided |
Keywords |
Modeling and Simulation, Nanotechnology, |