About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Ceramic-Based Materials: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
Multi-Material Direct Ink Writing for Ceramic Nuclear Fuel Applications |
| Author(s) |
Patrick L. Snarr, Corson Cramer, Chris Petrie, Andrew Nelson |
| On-Site Speaker (Planned) |
Patrick L. Snarr |
| Abstract Scope |
Direct ink writing (DIW) is an extrusion-based AM process that excels at multi-material printing as multiple extrusion nozzles can be installed on the same gantry system. However, co-sintering of multi-material ceramic parts is a large challenge as different sintering behavior between the two materials leads to stress build up resulting in part failure. This work aims to quantify the allowable mismatch to avoid part cracking in solid solution forming multi-material systems and discusses best strategies to reduce the mismatch during co-sintering. Engineering each DIW ink to match sintering behavior as well as using discrete and continuous multi-material gradients were explored to reduce sintering mismatch. It was found ~1% of mismatch is tolerable during debind cycles, and ~5% mismatch is manageable during sintering cycles after slurries are thermally matched. Use of continuous gradients is shown to reduce sintering mismatch, although geometric resolution may be lost due to solid solution formation. |