About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
|
| Symposium
|
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
|
| Presentation Title |
Binderless Additive Manufacturing of Ceramics by Selective Laser Flash Sintering |
| Author(s) |
Matthew Cassoli, Desiderio Kovar |
| On-Site Speaker (Planned) |
Matthew Cassoli |
| Abstract Scope |
Ceramic additive manufacturing processes use polymeric binders that are removed by pyrolysis before post-scan sintering. The time required for pyrolysis increases dramatically with part dimensions, which practically limits part size. Another challenge is that existing powder-based processes produce parts with limited relative densities, and thus relatively poor mechanical properties.
Selective laser flash sintering (SLFS) is a binderless, direct additive manufacturing process being developed to additively manufacture high density ceramic parts. SLFS leverages flash sintering to allow for lower process temperatures, but microscale defects may be induced by thermal shock after laser scanning. In this study, cooling rates in the powder bed are measured after scanning and strategies are studied that reduce thermal gradients that cause cracking. Sample parts were fabricated and mechanical strengths compared for parts produced using standard laser scan strategies and using the modified strategies. |
| Proceedings Inclusion? |
Undecided |