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Thermoelectric properties of Ti0.3Zr0.35Hf0.35Ni1.005Sn half-Heusler alloy
Journal of Applied Physics, 2019Thermoelectrics enabling a direct conversion of waste heat into useful electricity is widely investigated for renewable energy applications. n-type half-Heusler (HH) MNiSn (M = Ti,Zr,Hf) thermoelectric (TE) elements are known as attractive semiconducting candidates for such purposes.
Oshrat Appel +4 more
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Nanosized precipitates in half-Heusler TiNiSn alloy
Applied Physics Letters, 2012The microstructure of half-Heusler TiNiSn alloy has been investigated in this study. A high density of coherent nanosized Heusler precipitates was found within the half-Heusler matrix. Formation of these Heusler precipitates occurs by a phase separation process, where a single phase solid solution (half-Heusler-Heusler) decomposes into an equilibrium ...
Yaw Wang Chai, Yoshisato Kimura
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Dilute Magnetic Semiconductors Based on Half-Heusler Alloys
Journal of the Physical Society of Japan, 2007We have investigated the electronic structure and magnetism of Mn-doped half-Heusler alloys by using the Korringa–Kohn–Rostoker coherent potential approximation (KKR-CPA) method within the local density approximation (LDA). Half-Heusler compounds can be attractive for spintronic applications because the crystal structure and lattice constant of these ...
Tetsuya Fukushima +3 more
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Iron‐based Semiconducting Half‐Heusler Alloys for Thermoelectric Applications
ChemNanoMat, 2022AbstractIron‐based half‐Heusler alloys constitute an emerging class of semiconducting intermetallics for scalable and efficient thermoelectric conversion, owing to their remarkably high‐power factor, abundance, and low cost. This review encompasses the recent advances in materials synthesis and evolving aspects of optimization pathways in pre‐existing ...
Nagendra S. Chauhan, Yuzuru Miyazaki
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Thermoelectric properties of Bi-doped half-Heusler alloys
Eighteenth International Conference on Thermoelectrics. Proceedings, ICT'99 (Cat. No.99TH8407), 2003Based on our preliminary promising results for Sb-doped ZrNiSn-type half-Heusler intermetallics, we made a new series of Bi-doped samples Zr/sub 0.5/Hf/sub 0.5/NiSn/sub 1-x/Bi/sub x/ with concentrations x in the range 0/spl les/x/spl les/0.02. While the isoelectronic alloying of Zr and Hf reduces the lattice thermal conductivity, doping on the Sn site ...
C. Uher, J. Yang, G.P. Meisner
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Magnetic behavior of half-Heusler alloy CuxNi1−xMnSb
Journal of Magnetism and Magnetic Materials, 2005Abstract We have investigated the effects on the magnetic properties of NiMnSb alloys with the substitution of Cu for Ni. The half-Heusler type alloys, CuxNi1−xMnSb compounds, are fabricated by the arc-melting method and are subsequently annealed at a temperature of 1050 K for 24 h.
S.K. Ren +5 more
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Thermoelectric properties of half-Heusler alloys
International Materials ReviewsHalf-Heusler alloys (HHs) as medium- and high-temperature thermoelectric materials have attracted increasing considerable attention, owing to their excellent mechanical properties and thermal stability. Nonetheless, the intercoupling between the Seebeck coefficient and electrical conductivity, and their high thermal conductivity limit the furthermore ...
Rongchun Chen +6 more
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Thermoelectric Properties of NbCoSn-based Half-Heusler Alloys
2006 25th International Conference on Thermoelectrics, 2006Thermoelectric properties of doped half-Heuslers, NbCoSn1-x Sbx and Nb0.99Ti0.01CoSn1-x Sbx, have been studied in the temperature range from 320 K to 850 K. These half-Heuslers were synthesized by the arc-melting of pure metals followed by annealing for one week at 1123 K in vacuum.
Yasuhiro Ono +3 more
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A search for half metallicity in half Heusler alloys
Journal of Magnetism and Magnetic Materials, 2019Abstract The structural, electronic, mechanical, magnetic and thermodynamic properties of XFeBi (X = Hf and Ti) alloys using the density functional theory as implemented in quantum espresso code are investigated. Both alloys are observed to have ferromagnetic character and are also half-metallic with a small band gap in their spin up channel.
M.I. Babalola, B.E. Iyorzor
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Microstructure evolution of nanoprecipitates in half-Heusler TiNiSn alloys
Acta Materialia, 2013Abstract The microstructures of thermoelectric TiNiSn half-Heusler alloys have been studied in detail. For concentration ratios that are slightly rich in Ni, a high density of Heusler-phase nanosized precipitates tended to precipitate within a half-Heusler matrix.
Yaw Wang Chai, Yoshisato Kimura
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