About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Poster Session
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Presentation Title |
Using Acoustic Sensors to Review Sample Integrity During Selective Laser Flash Sintering of Ceramics |
Author(s) |
Christina L. Nissen, Deborah Hagen, Desiderio Kovar, Joseph J. Beaman |
On-Site Speaker (Planned) |
Christina L. Nissen |
Abstract Scope |
Current production Solid Freeform Fabrication (SFF) in ceramics involves the use of added polymers which must be removed in later stages of fabrication through pyrolysis, as without these added polymers ceramic is subject to the effects of thermal shock during fabrication. This added stage makes the process inefficient, and additionally limits the thickness of parts that can be produced. Current research in this area is looking to remove these polymers from the process entirely, so that ceramic powders are sintered directly, removing the time intensive pyrolysis from the process. The integrity of the sintered sample must be reviewed individually after each attempt as efforts to measure current and temperature alone of samples in situ have not been enough to determine part integrity. Our current research reviews the application of an acoustic wave time-of-flight measurement system in situ to detect process-initiated defects in Selective Laser Flash Sintered (SLFS) ceramics, as both a research aid and an improvement to overall process control during the SLFS process. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |