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Thermoelectric properties of half-Heusler high-entropy Ti2NiCoSn1-xSb1+ x (x = 0.5, 1) alloys with VEC>18
A. Karati, V.S. Hariharan, S. Ghosh, A. Prasad, M. Nagini, K. Guruvidyathri, R.C. Mallik, R. Shabadi, L. Bichler, Show More
Published in Acta Materialia Inc
Volume: 186
Pages: 375 - 380
A new set of half-Heusler high-entropy alloys Ti2NiCoSn1-xSb1+ x (x = 0.5, 1), with a valence electron count higher than 18, were investigated for thermoelectric applications. Vacuum arc melting was employed for synthesis. Atom probe analysis confirmed single-phase at atomic level. The alloys were subsequently ball milled for 1 h followed by spark plasma sintering for consolidation. In 1 h BM cases, the alloy with x = 0.5 exhibited a low lattice thermal conductivity of 2.48 Wm−1K−1, and a ZT of 0.29 at 873 K. © 2020
About the journal
JournalScripta Materialia
PublisherActa Materialia Inc