About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
Presentation Title |
High Absorptivity Nanotextured Powders for Metal 3D Printing |
Author(s) |
Adrian Lew, Ottman Tertuliano, Philip DePond, Andrew Lee, Jiho Hong, David Doan, Mark Brongersma, Wendy Gu, Manyalibo Matthews, Wei Cai |
On-Site Speaker (Planned) |
Adrian Lew |
Abstract Scope |
The widespread application of metal additive manufacturing (AM) is limited by the ability to control the complex interactions between the energy source and the feedstock material. Here we develop a scalable process to introduce nanoscale grooves to the surface of copper and tungsten powders which increases the powder absorptivity by up to 70% during laser powder bed fusion. The absorptivity increase enables printing of pure copper structures with densities up to 92% using laser energy densities as low as 82 J/mm3, and less porous tungsten structures for the same power density. Simulations show that the enhanced powder absorptivity results from plasmon-enabled light concentration in nanoscale grooves combined with multiple scattering events. The approach taken here demonstrates a general method to enhance the absorptivity and printability of reflective metal powders at low energy densities by changing the surface morphology of the feedstock without altering its composition. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, Copper / Nickel / Cobalt, Powder Materials |