|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications V
||Synthesis, Processing and Transport Properties of Metastable Phases in the Mg-Si-Sn System
||Pathikumar Sellappan, Anthony Fong, Masayuki Murata, Yasuhiro Kodera, Javier E Garay
|On-Site Speaker (Planned)
Compounds in the Mg-S-Sn recently attracted considerable attention as thermoelectric materials due to their low-cost, earth abundant, environmentally friendly constituents. We demonstrate the synthesis of trigonal form of Mg-Sn and Mg-Si-Sn, phases which are not found on the Mg-Sn or Mg-Si-Sn phase diagram. We investigated the phase transformation (cubic to trigonal) while increasing the Si content on the system and optimized the high-energy ball milling parameters. We employed current activated pressure assisted densification (CAPAD) on the phase transformed powder to consolidate them into a near theoretical dense form while maintaining the phase as well as fine nano-structure. We present the effect of CAPAD parameter on the density, microstructure and phase composition of the material. We also show the influence of processing parameters on the transport properties and thermoelectric properties.
||Planned: Supplemental Proceedings volume