|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
|A-1: 3D Ink-Extrusion Printing of NbFeSb Thermoelectric Legs with Complex Shape
|Alexander Proschel, Duncan Zavanelli, Jeffery C Snyder, David C. Dunand
|On-Site Speaker (Planned)
Current manufacturing processes for brittle, thermoelectric (TE) materials limit material shape and device geometry, limiting both performance and utility. Also, current processes such as ball milling and hot pressing are time consuming and unsuitable for continuous processing and they require subsequent slicing steps increasing cost due to kerf loss of high purity TE material. Thus, the development of additive manufacturing synthesis techniques for TE legs is important for widespread implementation. This talk will present a 3D ink-extrusion procedure for printing NbFeSb, one of the highest performing p-type half Heusler thermoelectric based on inexpensive Fe, and with excellent mechanical stability. This synthesis approach utilizes metallic precursor powders suspended in a polymer ink, which is 3D printed at ambient temperature and subsequently sintered at high temperature, allowing for manufacturing of geometrically-complex NbFeSb legs with minimal material loss, and without issues of evaporation, cracking and lack of fusion associated with laser-based additive manufacturing.
|Additive Manufacturing, Other, Other