| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Optimization on Yield Production of Nanoporous Copper Powders via Chemical Dealloying |
| Author(s) |
Aishwarya Thotta Jayachandran, Laura Duenas Gonzalez, Natalya Kublik, Bruno Azeredo |
| On-Site Speaker (Planned) |
Aishwarya Thotta Jayachandran |
| Abstract Scope |
Nanoporous copper (np-Cu) powders are found to have significant applications in hierarchical electrodes fabrication as a feedstock in additive manufacturing and powder casting due to their high surface area (~12 m2/g) and size-dependent properties. However, its fabrication through chemical dealloying is largely limited by etching solution concentration, chemical kinetics, and mass diffusion. In this work, these fundamental issues have been analyzed to increase the yield of np-Cu powders fabrication without compromising their nanostructure or promote by-products by varying the molarity ratios of np-Cu precursor (CuAl) to etching solution (NaOH). The np-Cu yield mass to NaOH volume ratio was increased by 5 times with no undesirable precipitates, which also means that the stoichiometry ratio of NaOH used to NaOH required to etch all Aluminum in CuAl was reduced from 8.5 to ~1.6. This optimization consists of a significant step towards a more efficient and sustainable feedstock production for the aforementioned applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Powder Materials, Copper / Nickel / Cobalt, Nanotechnology |