Publikationen

Mechanical properties of half-Heusler alloys

Autor(en)
G. Rogl, A. Grytsiv, Matthias Gürth, A. Tavassoli, C. Ebner, A. Wuenschek, S. Puchegger, V. Soprunyuk, W. Schranz, E. Bauer, H. Mueller, M. Zehetbauer, P. Rogl
Abstrakt

As half-Heusler compounds are promising candidates for environmentally friendly and low-cost thermoelectric materials, not only a high figure of merit and efficiency are necessary but also detailed knowledge of mechanical properties and thermal expansion is compulsory. Although these properties are quite important to evaluate mechanical stability of a thermoelectric device under mechanical stress in a temperature gradient, they have been scarcely reported in the literature. The present article comprises a series of new data of hardness and elastic moduli (in some cases in dependence on composition, density and/or temperature), fracture resistance and thermal expansion, measured with various methods and equipments, as well as a comprehensive compilation of mechanical properties of p- and n-type half-Heusler alloys hitherto available in the literature. Wherever available, experimental data are compared with those from DFT model simulations. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Organisation(en)
Institut für Materialchemie, Physik Nanostrukturierter Materialien, Fakultätszentrum für Nanostrukturforschung, Physik Funktioneller Materialien
Externe Organisation(en)
Christian Doppler Laboratory for Thermoelectricity, Technische Universität Wien, Universität Wien
Journal
Acta Materialia
Band
107
Seiten
178-195
Anzahl der Seiten
18
ISSN
1359-6454
DOI
https://doi.org/10.1016/j.actamat.2016.01.031
Publikationsdatum
04-2016
Peer-reviewed
Ja
ÖFOS 2012
Materialphysik, Materialchemie
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/mechanical-properties-of-halfheusler-alloys(c77466c8-3bfe-4042-957f-06cb99625b79).html