Thermal Stability and Mechanical Properties of Thermoelectric Tetrahedrite Cu12Sb4S13
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Tetrahedrite Cu12Sb4S13 was prepared by mechanical alloying and hot pressing, and its thermal stability and mechanical properties were examined. The phase transformation (decomposition), chemical composition, elemental redistribution, microstructure, hardness, and three-point bending strength were studied under various aging conditions (atmospheric, temperature, and time). Endothermic peaks were observed at temperatures from 845 K to 892 K and were found to be related to tetrahedrite decompositions. The Vickers hardness of the pristine specimen was 2.2 GPa on average, and did not significantly change with the aging conditions. The bending strength of the pristine specimen was 26.7 MPa on average, and it remarkably decreased to 6.2 MPa after aging at 723 K for 100 h in air. However, it was 21.4 MPa after aging at 723 K for 100 h in vacuum.
KeywordsTetrahedrite thermoelectric thermal stability mechanical
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This study was supported by a grant from the Industrial Core Technology Development Program (10083640) funded by the Ministry of Trade, Industry and Energy (MOTIE), Republic of Korea.
- 3.E. Makovicky and B.J. Skinner, Can. Mineral. 16, 611 (1978).Google Scholar
- 20.A.P. Gonçalves, E.B. Lopes, M.F. Montemor, J. Monnier, and B. Lenoir, J. Electron. Mater. 47, 2880 (2018).Google Scholar
- 22.K. Chen, Synthesis and Thermoelectric Properties of Cu-Sb-S Compounds, Ph. D. Thesis, p. 36, Queen Mary University of London, UK (2016).Google Scholar