Abstract
Heusler-type Fe2AlVxTi1-x alloys offer an alternative solution for the generation of thermoelectric power near room temperature. In the current research, thermoelectric properties of the p-type Fe2AlV0.9Ti0.1 and Fe2AlV0.9Ti0.1/CNT alloys, prepared by SPS, were studied. Carbon nanotubes (CNT) were used as dopants to improve the seebeck coefficient and electrical conductivity. Upon doping with CNT, the thermal conductivity was significantly reduced, meanwhile, the value of the power factor increased from 0.45 to 1.55 mW/mK2 at around 330 K. The effect of CNT inclusions on the thermoelectric parameters of Fe2AlVxTi 1-x compounds was systematically studied. When compared to Fe2AlV0.9Ti0.1, which had a figure of merit of just 0.02 at 330 K, the CNT-containing samples showed a significantly improved figure of merit up to 0.07. We offer a novel technique to improve the performance of Fe2AlV alloys.
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