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 |
Powder Packing and Part Removal in Compressed Powder Beds |
Author(s) |
David Khanan, Joseph J Beaman, Desiderio Kovar, Matthew Cassoli |
On-Site Speaker (Planned) |
Matthew Cassoli |
Abstract Scope |
The final density of fired ceramics can be enhanced by increasing the relative density of ceramic powders prior to sintering. For selective laser flash sintering (SLFS), higher powder bed density is attained by applying a pressure to increase the relative density of the powder prior to laser scanning and post-process firing. In this study, the consistency of packing layers of 8YSZ onto an existing 8YSZ substrate was studied by first uniaxially pressing 8YSZ powders into a pellet. Additional powder was then spread over the existing sample and uniaxially pressed again. Metrics for characterizing the powder compaction and repeatability of adding additional layers, as required for additive manufacturing, were studied. After laser scanning, the part must be removed from the compressed, but unscanned regions. Methods were studied to separate the scanned regions including sonication, abrasion, and dispersion. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |