About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nano and Micro Additive Manufacturing
|
| Presentation Title |
Flow Analysis of Copper Hybrid Feedstock for Laser Powder Bed Fusion |
| Author(s) |
Ailyn Sofia Guerrero Gomez, Laura Duenas Gonzalez, Bruno Azeredo |
| On-Site Speaker (Planned) |
Ailyn Sofia Guerrero Gomez |
| Abstract Scope |
Laser Powder Bed Fusion (LPBF) offers a promising method for manufacturing copper-based microelectronics with complex geometries and excellent electrical and thermal conductivity. However, copper’s high reflectivity (>95% at 1070 nm) challenges LPBF, often requiring high energy densities (i.e., high power, low scan speeds), which enlarge the melt pool, reducing resolution essential for microscale features. It is proposed that incorporating nanoparticles into the copper powder feedstock decreases energy demand due to their lower melting point. However, nanoparticles typically exhibit low flowability, which hinders powder deposition in LPBF. This study analyzes the flowability of hybrid feedstocks containing nanoparticles of different sizes (40–60 nm vs. 300 nm) and volume contents (0.1-15.0 vol%) through single-layer deposition using the Doctor Blade method. The results show that increasing nanoparticle volume content diminishes the quality of powder deposition, with more pronounced effects for larger nanoparticles. Ongoing work aims to improve feedstock deposition by optimizing mixing parameters. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Powder Materials |