|About this Abstract
||MS&T23: Materials Science & Technology
||Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
||Investigating the Effect of Part Geometry on Microstructure for Laser Powder Bed Fusion of Bismuth Telluride using In-Situ Process Monitoring
||Clayton Perbix, Nellie Pestian, Joe Walker, Saniya LeBlanc, Joy Gockel
|On-Site Speaker (Planned)
Bismuth Telluride (Bi<sub>2</sub>Te<sub>3</sub>) is a promising material for thermoelectric applications. However, little is currently known about the effect on microstructure and ultimately thermoelectric performance when the material is additively manufactured using laser powder bed fusion (PBF-LB). In this study, we investigate the effect of various build parameters and part geometries on the microstructure development of Bi<sub>2</sub>Te<sub>3</sub>. Additionally, in-situ process monitoring is performed using long-wavelength infrared imaging (LWIR) to provide localized temperature data to be correlated to input factors and resultant properties of a given part. Preliminary results suggest that PBF-LB Bi<sub>2</sub>Te<sub>3</sub> parts exhibit a large range of thermoelectric properties and microstructural features that are dependent on processing inputs. These findings also suggest that LWIR data can be used to infer the results of a given set of process inputs or build geometries, and that optimizing PBF-LB process parameters can lead to improved Bi<sub>2</sub>Te<sub>3</sub> thermoelectric performance.