Reduced Lattice Thermal Conductivity for Half-Heusler ZrNiSn through Cryogenic Mechanical Alloying

Bahrami A, Ying P, Wolff U, Rodriguez NP, Schierning G, Nielsch K, He R (2021)
ACS applied materials & interfaces 13(32): 38561–38568.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Bahrami, Amin; Ying, Pingjun; Wolff, Ulrike; Rodriguez, Nicolas Perez; Schierning, GabiUniBi; Nielsch, Kornelius; He, Ran
Abstract / Bemerkung
The ZrNiSn-based half-Heusler compounds are promising for thermoelectric applications in the mid-to-high temperature range. However, their thermoelectric performance was greatly limited due to the remaining high thermal conductivity, especially the lattice thermal conductivity. Herein, we report the synthesis of pristine half-Heusler ZrNiSn through direct mechanical alloying at a liquid nitrogen temperature (i.e., cryomilling) followed by spark plasma sintering. It is shown that the onset sintering temperature is greatly reduced for the cryomilled powders with a high density. A reduced thermal conductivity is subsequently realized from room temperature to 700 °C in the cryomilled samples than the one that was differently prepared (from 7.3 to 4.5 W/m K at room temperature). The pronounced reduction in thermal conductivity of ZrNiSn yields a maximum zT of 0.65 at 700 °C. Our study shows the possibility of cryomilling in advancing the thermoelectric performance through enhanced phonon scattering.
Erscheinungsjahr
2021
Zeitschriftentitel
ACS applied materials & interfaces
Band
13
Ausgabe
32
Seite(n)
38561–38568
eISSN
1944-8252
Page URI
https://pub.uni-bielefeld.de/record/2956897

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Bahrami A, Ying P, Wolff U, et al. Reduced Lattice Thermal Conductivity for Half-Heusler ZrNiSn through Cryogenic Mechanical Alloying. ACS applied materials & interfaces. 2021;13(32):38561–38568.
Bahrami, A., Ying, P., Wolff, U., Rodriguez, N. P., Schierning, G., Nielsch, K., & He, R. (2021). Reduced Lattice Thermal Conductivity for Half-Heusler ZrNiSn through Cryogenic Mechanical Alloying. ACS applied materials & interfaces, 13(32), 38561–38568. https://doi.org/10.1021/acsami.1c05639
Bahrami, A., Ying, P., Wolff, U., Rodriguez, N. P., Schierning, G., Nielsch, K., and He, R. (2021). Reduced Lattice Thermal Conductivity for Half-Heusler ZrNiSn through Cryogenic Mechanical Alloying. ACS applied materials & interfaces 13, 38561–38568.
Bahrami, A., et al., 2021. Reduced Lattice Thermal Conductivity for Half-Heusler ZrNiSn through Cryogenic Mechanical Alloying. ACS applied materials & interfaces, 13(32), p 38561–38568.
A. Bahrami, et al., “Reduced Lattice Thermal Conductivity for Half-Heusler ZrNiSn through Cryogenic Mechanical Alloying”, ACS applied materials & interfaces, vol. 13, 2021, pp. 38561–38568.
Bahrami, A., Ying, P., Wolff, U., Rodriguez, N.P., Schierning, G., Nielsch, K., He, R.: Reduced Lattice Thermal Conductivity for Half-Heusler ZrNiSn through Cryogenic Mechanical Alloying. ACS applied materials & interfaces. 13, 38561–38568 (2021).
Bahrami, Amin, Ying, Pingjun, Wolff, Ulrike, Rodriguez, Nicolas Perez, Schierning, Gabi, Nielsch, Kornelius, and He, Ran. “Reduced Lattice Thermal Conductivity for Half-Heusler ZrNiSn through Cryogenic Mechanical Alloying”. ACS applied materials & interfaces 13.32 (2021): 38561–38568.

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