| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Ceramic Materials and Processing
|
| Presentation Title |
Eco-friendly Additive Manufacturing of Si₃N₄ Aqueous Suspensions via Robocasting |
| Author(s) |
Flavie Lebas, Elisa Jaumouille, Sylvain Marinel, Romuald Herbinet, Loïc Le Pluart, Charles Manière |
| On-Site Speaker (Planned) |
Flavie Lebas |
| Abstract Scope |
Si₃N₄ is an advanced ceramic highly attractive for applications in aeronautics, aerospace, and other industries. Traditional manufacturing processes involve extensive green machining followed by post-sintering corrective machining. Replacing these high-precision processes with faster methods, coupled with post-sintering machining, represents a promising alternative. In this context, robocasting, which is based on the extrusion of low organic aqueous suspensions, is well-suited for the rapid printing of large shapes. The optimal quantities of dispersant, ceramic loading rate, and organic binders were determined to achieve rheological properties suitable for robocasting. Thinner and more complex parts than those previously reported in the literature were printed with a 45.90% vol solid loading. These parts were sintered at 1850°C, exhibited a distinctive microstructure with highly non-equiaxed Si₃N₄ grains (needles), and achieved a microhardness value of 1505 HV, comparable to Si₃N₄ ceramics fabricated through conventional processing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Ceramics, Shaping and Forming |