Journal article

Publication year: 2020

Journal: Journal of Alloys and Compounds

Volume number: 845

ISSN: 0925-8388

eISSN: 1873-4669

Open access status: Green

DOI Link: https://doi.org/10.1016/j.jallcom.2020.156205

Publisher: Elsevier

Abstract: 

Knowledge of the mechanical properties of thermoelectric materials at high temperature is required for the modelling and optimization of a thermoelectric generator under application conditions. We present room and high temperature characterization of Young's modulus for Mg2Si, Mg2Sn and their solid solutions establishing a linear dependence, both on composition and on temperature.

Through the comparison of Resonant Ultrasound Spectroscopy and free vibration techniques, we measure the elastic moduli with high precision. The comparison of our results (E = 110 GPa for Mg2Si and 78 GPa for Mg2Sn) to first principles calculations and experimentally reported data shows good agreement. Additionally, by estimating the Poisson ratio, we calculate the temperature-dependent shear modulus G and finally provide a simple bilinear function for Young's and shear moduli as a function of temperature and composition. (C) 2020 Elsevier B.V. All rights reserved.

Harvard Citation style: Castillo-Hernandez, G., Yasseri, M., Klobes, B., Ayachi, S., Mueller, E. and de Boor, J. (2020) Room and high temperature mechanical properties of Mg₂Si, Mg₂Sn and their solid solutions, Journal of Alloys and Compounds, 845, Article 156205. https://doi.org/10.1016/j.jallcom.2020.156205

APA Citation style: Castillo-Hernandez, G., Yasseri, M., Klobes, B., Ayachi, S., Mueller, E., & de Boor, J. (2020). Room and high temperature mechanical properties of Mg₂Si, Mg₂Sn and their solid solutions. Journal of Alloys and Compounds. 845, Article 156205. https://doi.org/10.1016/j.jallcom.2020.156205