Effect of Nb substitution for V on the thermoelectric properties of Fe2VAl

Kurosaki, Ken; Muta, Hiroaki; Endo, Yukio; Charoenphakdee, Anek; Uno, Masayoshi; Yamanaka, Shinşuke

doi:10.1016/j.jallcom.2009.06.202

Cited by 22 publications

(16 citation statements)

References 14 publications

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“…26 Lue et al report the effects of partial substitution of Nb onto the V sites of Fe 2 VAl by measuring the electrical resistivity, Seebeck coefficient, and thermal conductivity as a function of temperature. 27 The polycrystalline samples of Fe 2 V 1Àx Nb x Al were prepared and the thermoelectric properties were characterized by Kurosaki et al 28 We have calculated magnetic and optical properties of Fe 2 VAl and Fe 3 Al also. 29 The aim of our work is to present the results of a theoretical investigation of the thermoelectric performance for Heusler-type compounds Fe 2 V 1Àx Nb x Al based on the full potential linearized augmented plane wave (FPLAPW) method and the semi-classical Boltzmann theory.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric properties of Heusler-type compound Fe2V1−xNbxAl

Wang

Zhao

et al. 2011

Journal of Applied Physics

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The transport properties are calculated within the full-potential linearized augmented plane-wave method and the semi-classical Boltzmann theory on the Heusler-type compound Fe 2 V 1Àx Nb x Al. The obtained Seebeck coefficients are in reasonable agreement with experimental results. The majority carriers of stoichiometric Fe 2 VAl are holes. When V is slightly replaced by Nb, the Seebeck coefficient becomes negative rapidly resulting in the main carrier changing from hole to electron. r=s of stoichiometric Fe 2 VAl exhibits semiconductor behavior. However, it transits into semimetal when V is replaced by Nb at low temperature and all Nb-substituted samples exhibit semiconducting behavior above 100 K. The power factor S 2 r=s of stoichiometric Fe 2 VAl is relative small, and it increases greatly after Nb substitution below 360 K. The low temperature power factor of Fe 2 V 1Àx Nb x Al (x = 0) increases dramatically due to the enhanced Seebeck coefficient.

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Section: Introductionmentioning

confidence: 99%

Thermoelectric properties of Heusler-type compound Fe2V1−xNbxAl

Wang

Zhao

et al. 2011

Journal of Applied Physics

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“…c). This value is equivalent to those of other Al‐based TE materials (1.6 mW m −1 K −1 at 800 K for RuAl 2 and 1 mW m −1 K −1 at RT for Fe 2 VAl ).…”

Section: Resultsmentioning

confidence: 49%

“…3c). This value is equivalent to those of other Al-based TE materials (1.6 mW m À1 K À1 at 800 K for RuAl 2 [10] and 1 mW m À1 K À1 at RT for Fe 2 VAl [25]). Figure 3d shows the temperature dependence of the C P of Al 3 V. The C P values exceed the Dulong-Petit limit, because of the electronic and dilatation contributions.…”

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confidence: 51%

Reduction of lattice thermal conductivity of pseudogap intermetallic compound Al₃V

Kumagai

Kurosaki

Ohishi

et al. 2015

Physica Status Solidi (b)

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One of the obstacles to the widespread use of thermoelectric (TE) generators is the toxicity of current TE materials. Hence, we focused on Al-based materials as candidate low-toxicity TE materials. Although Al-based materials have high power factor (PF), the achievement of high TE performance is difficult because of the high lattice thermal conductivity (k lat ). The aims of the present study are to investigate the TE properties of Al 3 V, and to enhance TE performance by k lat reduction. We found that Ti substitution decreases the k lat and increases the PF of Al 3 V. 1 Introduction Thermoelectric (TE) power generation can directly convert waste heat into electric energy, and has attracted attention as an energy-saving technique [1]. The efficiency of TE generation is determined by the temperature difference applied to the TE generation module and the effectiveness of the TE materials. The effectiveness of TE materials is determined by the dimensionless figure of merit zT ¼ S

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Section: Effect Of Composition On Electrical Conductivity Seebeck Coe...mentioning

confidence: 99%

“…In the case of homogeneous solid solutions, the thermoelectric properties can be modulated on the basis of the fraction of the substituting elements. For example, the substitution effects are deeply known for the Fe 2 VAl and Fe 2 VAl-related FH compounds [36][37][38][39]. In fact, it is known that in multi-substituted Fe-based FH alloys, where the V atoms are replaced with isoelectronic elements (Nb and Ta), the thermoelectric performances result generally enhanced.…”

Section: Effect Of Composition On Electrical Conductivity Seebeck Coe...mentioning

confidence: 99%

Synthesis and Characterization of Thermoelectric Co2XSn (X = Zr, Hf) Heusler Alloys

Difalco

Aversano

Boldrini

et al. 2020

Metals

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In this work, we report the results of an experimental investigation on the synthesis, structure, microstructure, mechanical, electrical conductivity, and Seebeck coefficient of Co2XSn (X = Zr, Hf) alloys. In both the alloys, the main constituent is a full Heusler-type compound that coexists with small amounts of secondary phases. Both alloys show a rather high Vickers hardness (around 900 HV) and an indentation fracture toughness typical of ceramics (around 2 MPa·m1/2). The electronic transport properties of the two alloys were measured for the first time. The temperature dependence of both the Seebeck coefficient and the electrical conductivity of the two alloys shows a change in correspondence of the Curie temperature. The Seebeck coefficient reaches a constant plateau, while the electrical conductivities show a transition from metallic to semiconductor behavior. As a consequence, almost constant values of the power factor have been obtained for the power factor above the Curie temperature, which is promising for an efficient exploitation of thermal gradients of several hundreds of degree in waste heat harvesting applications. Finally, on the basis of results from this work and from the literature, the effect of the substitution of the X element on the electronic transport properties in the series Co2XSn (X = Ti, Zr, Hf) is discussed.

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Effect of Nb substitution for V on the thermoelectric properties of Fe2VAl

Cited by 22 publications

References 14 publications

Thermoelectric properties of Heusler-type compound Fe2V1−xNbxAl

Thermoelectric properties of Heusler-type compound Fe2V1−xNbxAl

Reduction of lattice thermal conductivity of pseudogap intermetallic compound Al₃V

Synthesis and Characterization of Thermoelectric Co2XSn (X = Zr, Hf) Heusler Alloys

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Effect of Nb substitution for V on the thermoelectric properties of Fe2VAl

Cited by 22 publications

References 14 publications

Thermoelectric properties of Heusler-type compound Fe2V1−xNbxAl

Thermoelectric properties of Heusler-type compound Fe2V1−xNbxAl

Reduction of lattice thermal conductivity of pseudogap intermetallic compound Al3V

Synthesis and Characterization of Thermoelectric Co2XSn (X = Zr, Hf) Heusler Alloys

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Reduction of lattice thermal conductivity of pseudogap intermetallic compound Al₃V