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Thermoelectric properties of Fe-V-Al Heusler alloy with excess of Al and deficiency of Fe
Khovailo A. V.1, Kolesnikov E. A.
1, Argunov E. V.
1, Khovailo V. V.
1, Karpenkov D. Yu.
1
1National University of Science and Technology MISiS, Moscow, Russia
Email: khovailov2002@gmail.com, kolesnikov.ea@misis.ru, ef1m.shifreen@gmail.com, khovaylo@gmail.com, karpenkov.dy@misis.ru
The results of the experimental studies of the thermoelectric properties of a Fe1.68VAl1.32 p-type Heuser alloy are presented. A comparison of the electrical resistivity rho and the Seebeck coefficient S measured in a temperature range 300-475 K with data, published for other Fe-V-Al p-type with different chemical compositions, showed that Fe1.68VAl1.32 has the lowest rho and one of the highest values of S. This leads to one of the record values of the power factor value PF~1.7 mW/(m-1·K-2 (at T=384 K) in Fe1.68VAl1.32, which is an order of magnitude higher than that in the stochiometric PF. The results of thermal conductivity measurements showed high values of kappa (~11 11 W/(m-1·K-1)) in the studied compound, which is comparable to thermal conductivity of the stochiometric Fe2VAl. Keywords: Heusler alloys, arc melting, transport properties, power factor.
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