About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Presentation Title |
Control of Selective Laser Flash Sintering of Ceramics Using an AC Electric Field |
Author(s) |
David Khanan, Desiderio Kovar, Joseph Beaman |
On-Site Speaker (Planned) |
David Khanan |
Abstract Scope |
Selective laser flash sintering (SLFS) allows for the production of ceramic parts with complex shapes and quick post-processing times as pyrolysis is not required. During the SLFS process, an AC electric field is passed across the build surface while a laser scans at high speeds to heat the powder and afterwards a new layer can be applied. The effect of the large electric field strengths and localized heating from the laser combine to activate carriers in the scanned region. The resulting Joule heating produces further heating of the powder that bonds the particles at the contact points via necking. The effects of processing parameters were studied by passively and actively varying the AC electric field while measuring and controlling the local temperature in the laser scanned regions. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |