| About this Abstract |
| Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
| Symposium
|
Materials
|
| Presentation Title |
Characterization of n-type Bismuth Telluride Manufactured via Selective Laser Melting |
| Author(s) |
Ryan Welch, Dean Hobbis, George Nolas, Saniya LeBlanc |
| On-Site Speaker (Planned) |
Ryan Welch |
| Abstract Scope |
Thermoelectric modules are devices that use the Seebeck or Peltier effect to generate power or pump heat. A thermoelectric module consists of n- and p-type legs connected thermally in parallel and electrically in series. Thermoelectric materials usually have high electrical conductivity and low thermal conductivity. The structure of the material — porosity, grain structure, and dislocations — influence the material transport properties. In this work, we manufactured ingots of n-type bismuth telluride from dry powder via selective laser melting. The structure and composition of the laser melted samples were compared to a traditionally manufactured, melt grown sample. The results indicated a high porosity, high aspect-ratio grain structure, and bismuth and tellurium rich areas throughout the sample. We concluded that the powder morphology and build direction influenced the porosity and the grain structure, respectively, while oxidation caused variations in constituent elements within the samples. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |