Characterization of the thermo-mechanical properties of p-type (MnSi1.77) and n-type (Mg2Si0.6Sn0.4) thermoelectric materials

SCRIPTA MATERIALIA

卷:172

Article

Mejri, M.¹  Thimont, Y.¹  Malard, B.²  Estournes, C.¹ 

[1] Univ Toulouse 3 Paul Sabatier, Univ Toulouse, CNRS, CIRIMAT, 118 Route Narbonne, F-31062 Toulouse, France

[2] Univ Toulouse, CNRS, CIRIMAT, INP ENSIACET, 4 Allee Emile Monso BP44362, F-31030 Toulouse, France

关键词: Silicide;    Hardness;    Toughness;    Young's modulus;    Thermal expansion coefficient;    Emissivity;    Spark plasma sintering;   

DOI  :  10.1016/j.scriptamat.2019.06.037

来源: Elsevier

【 摘 要 】

The thermoelectric generators reliability is highly sensitive to the materials they are made off. This work aims to characterize the structure, microstructure, emissivity and thermo-mechanical properties of p-type (MnSi1.77) and n-type (Mg2Si0.6Sn0.4) highly promising thermoelectric materials. In particular, the temperature dependence of the Young's modulus, evaluated by impulse excitation technique, shows for both materials values higher than those reported in literature. Fracture toughness measured by both single edge notched beam and indentation methods exhibits similar values to those reported in the literature. Micro-indentation measurements reveal that the hardness values of the MnSi1.77 are significantly higher than the Mg2Si0.6Sn0.4 one. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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