| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Fabrication of Nanoporous Aluminum Powders via Thermal and Chemical Processing |
| Author(s) |
Jodie Baris, Jonah Erlebacher |
| On-Site Speaker (Planned) |
Jodie Baris |
| Abstract Scope |
Nanoporous aluminum possesses a highly reactive and high surface area, making it useful for many applications. Most current methods of fabricating nanoporous aluminum use electrochemical approaches that are energy intensive and require bulk metal precursors. Here, we present a new method to generate nanoporous aluminum powder from Zn50Al50 powder using a single-step heating process followed by chemical etching. This technique utilizes the miscibility gap in the phase behavior of the Zn-Al system to heat and anneal samples such that a solid solution forms, then quench the powders to drive phase separation via spinodal decomposition. This results in a bicontinuous microstructure with separate Al and Zn domains with length scales controllable between 30-100 nanometers. A combination of acid etchants can remove Zn to generate nanoporous Al powder with minimal residual surface oxide. Methods to process and tune the microstructure will be presented, along with characterization by SEM, EDS and TEM. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Nanotechnology, Powder Materials |