|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications IX
||Unique Influences of Laser Additive Manufacturing on Multiscale Structuring of Bismuth Telluride Thermoelectric Materials
||Saniya Leblanc, Ryan Welch, Bengisu Sisik
|On-Site Speaker (Planned)
Additive manufacturing can overcome challenges posed by traditional thermoelectric device. This talk will describe our progress in laser-based additive manufacturing of bismuth telluride using a laser additive process that locally melts successive layers of material powder to construct 3D objects. This technique could enable new device architectures and multiscale structuring. We will discuss the impact of laser-induced, rapid melting and solidification on nano-, micro- and meso-structure. We explain the relationship between laser processing parameters and the melt pool geometry, grain structure, and porosity. Transmission electron microscopy investigations of the nanostructure show disperse oxide inclusions that explain transport property measurement results. Investigation of processed material’s nanostructure also shows the unique grain boundaries and dislocations that result from laser processing. Finally, we show numerical modeling of different thermoelectric leg geometries enabled by additive manufacturing.