Thermoelectric properties of half-Heusler high-entropy Ti2NiCoSn1-xSb1+x (x = 0.5, 1) alloys with VEC>18. (September 2020) - Karati, Anirudha
ABSTRACT: A new set of half-Heusler high-entropy alloys Ti2 NiCoSn1-x Sb1+ 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 −1 K −1, and a ZT of 0.29 at 873 K. Graphical abstract: Image, graphical abstract