|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing for Energy Applications IV
||3D Ink-extrusion Printing of Thermoelectric Materials onto Heat Exchangers
||Alexander Proschel, Donna P. Guillen, Dennis Tucker, David Dunand
|On-Site Speaker (Planned)
||Donna P. Guillen
Thermoelectric materials can convert rejected heat into electrical energy, thus augmenting the utility of heat exchangers. However, conventionally manufactured thermoelectric devices are restricted by geometric and manufacturing limitations. The development of ink-based additive manufacturing (AM) techniques could overcome these restrictions and expand the potential applications of thermoelectric generation. This talk will describe a 3D ink-extrusion technique developed for printing half-Heusler thermoelectric materials using a low-cost 3D printer. This approach suspends metallic powder precursors in a viscous polymer solution to print continuous struts forming microlattice structures. A subsequent heat treatment step vaporizes the remaining polymer and binder while simultaneously densifying the powders. Afterwards, the printed part is infiltrated with a liquid metal precursor to form the desired thermoelectric phase. This AM approach offers the potential to print thermoelectric materials directly onto heat exchangers improving efficiency, cost and performance.