期刊
SCRIPTA MATERIALIA
卷 157, 期 -, 页码 129-134出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.08.008
关键词
Spark plasma sintering; Thermoelectric materials; Thermal conductivity
类别
资金
- National Natural Science Foundation of China [51101103, 51571144]
- Shenzhen Science and Technology innovation commission [JCYJ20150827155136104, JCYJ20150324141711684]
Nb1-xMxFeSb (M = Hf, Zr, Mo, V, Ti; equimolar) thermoelectric materials were prepared by arc melting and subsequent spark plasma sintering. NbFeSb-based half-Heusler phases with a high-entropy lattice were obtained by replacing the Nb sites with multielement M atoms. The lattice thermal conductivity decreased as the M content increased, which mainly resulted from the high entropy effect. A low lattice thermal conductivity of 2.5 W/m K and a high figure of merit of 0.88 were obtained at 873 K, showing the great promise of the high entropy strategy for reducing the lattice thermal conductivity and enhancing the thermoelectric performance. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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