About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Electrostatic Powder Spreading (ESPS) as a Method to Build Multi-Material Powder Bed Fusion Parts |
Author(s) |
Eric S. Elton, Ziheng Wu, Michael J. Troksa, Gabe Guss |
On-Site Speaker (Planned) |
Eric S. Elton |
Abstract Scope |
Laser powder bed fusion processes rely on mechanically spreading each powder layer with a spreader bar, limiting the ability to deposit multiple materials on one layer. While methods to deposit more than one powder per layer exist, they are complicated and time consuming. Here we demonstrate electrostatic powder spreading (ESPS) as a new method to deposit metal powders for LPBF and enable multi-material LPBF builds. ESPS uses the electric field between a powder reservoir and a counter electrode to move powder from the reservoir to the bed with no contact to the powder bed. We demonstrate control over deposition rate and layer thickness and show parts built using ESPS. Finally, we demonstrate that ESPS can deposit powder layers with more than one material when an array of electrodes is used, pointing to a method to build metal parts with arbitrary 3D material gradients.
Prepared by LLNL under Contract DE-AC52-07NA27344. LLNL-ABS-833932 |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |