Fast preparation and thermal transport property of TiCoSb-based half-Heusler compounds

TiCoSb-based half-Heusler compounds with the substitution of Zr for Ti have been prepared quickly by combining high- nergy ball milling method with spark plasma sintering technique, and their thermal transport properties have been investigated. With the increase of the concentration of Zr, the thermal conductivity of Ti_1 - xZr_xCoSb compounds decreases significantly. Compared with the thermal conductivity of TiCoSb compound, that of Ti_0.5Zr_0.5CoSb decreases by 107% at 1000 K.