| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Functional and Energy Materials
|
| Presentation Title |
3D Ink Printing of Thermoelectric Materials |
| Author(s) |
Christoph Kenel, David C. Dunand |
| On-Site Speaker (Planned) |
David C. Dunand |
| Abstract Scope |
Additive manufacturing of thermoelectric materials enables the production of shape conforming, geometrically complex and intricate components. With ongoing material development, Bi2Te3 remains among the most efficient materials for temperatures close to room temperature. Here, an ink-based approach is presented, where a powder-loaded ink containing binders is 3D ink extruded in the desired shape. After printing, the binders are thermally removed and the powders are sintered to yield a fully intermetallic part. The initial ink can be loaded with pre-alloyed Bi2Te3 powders, that are then directly sintered, or by blends of Bi2O3+3TeO2, that are co-reduced and reacted to form Bi2Te3 in situ during thermal treatment in a reducing H2 atmosphere. In-situ synchrotron x-ray diffraction elucidates the complex co-reduction of Bi2O3 and TeO2 requiring precise process control to obtain the desired Bi2Te3 phase. The presented approach is cost effective, versatile and foreseen to widen the range of 3D-printable thermoelectrics in the future. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |