|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||General Poster Session
||O-48: Study of Temperature Dependent Elastic Properties of SnSe Using Resonant Ultrasound Spectroscopy
||Ashoka Karunarathne, Joseph R. Gladden, Gautam Priyadarshan, Pai-Chun Wei, Yang-Yuan Chen, Sriparna Bhattacharya, Apparao Rao
|On-Site Speaker (Planned)
A study of the room temperature thermal conductivity of SnSe using elastic measurements will aid in a better understanding of thermoelectric efficiency and fracture strength. Resonant Ultrasound Spectroscopy (RUS) is a widely used experimental technique for investigating the elasticity of solid materials. RUS can determine the elastic stiffness tensor of materials by using the vibrational resonance spectrum of a polished sample and can be applied over a range of temperatures and hydrostatic pressures. SnSe is a widely studied thermoelectric material which exhibits a structural phase transition from Pnma to Cnma at ~800 K. The anisotropic layered orthorhombic crystal structure of SnSe results in nine independent elastic constants. In this study, RUS was used to determine the temperature dependent elastic properties of polycrystalline SnSe through its phase transition temperature. Elastic constants of SnSe single crystals measured at room temperature are comparable to about ~ 35% of theoretical reported values.
||Planned: Supplemental Proceedings volume