| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nano and Micro Additive Manufacturing
|
| Presentation Title |
Agglomerate Formation and Flowability Analysis of Hybrid Feedstocks Containing Micron-sized Nanoporous Copper Powders and Nanoparticles for Laser Powder Bed Fusion Printing |
| Author(s) |
Laura Duenas Gonzalez, Natalya Kublik, Bruno Azeredo |
| On-Site Speaker (Planned) |
Laura Duenas Gonzalez |
| Abstract Scope |
Spherical, Micron-sized, and Nanoporous Copper powders (np-Cu) can be used as feedstock in Laser Powder Bed Fusion due to both their low reflectivity which results from nanopore light-entrapment and low-oxygen content, and their capacity to transfer their inherent size-dependent properties, such as high reactivity and surface-area into the manufactured part. Nonetheless, feedstocks must achieve well-packed and uniform layers during printing. This work presents a comprehensive analysis of agglomerate formation during the hybrid feedstock preparation of chemically etched np-Cu and copper nanoparticles and its impact on flowability and layer coating to ensure homogeneous voxels during prints at various volumetric energy densities. Preliminary data of single-layer beds (90x90x0.35mm3) deposited by the Doctor Blade method shows that spreadability is negatively affected by increasing speeds during ball-mill mixing, humidity, and nanoparticle content. Near future work comprehends the analysis of particle size and agglomerates by automated imaging particle size analyzer and Hall/Carney flowability measurements. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Powder Materials |