Castillo-Hernandez, Gustavo und Yasseri, Mohammad und Ayachi, Sahar und de Boor, Johannes und Müller, Eckhard (2019) Hardness and fracture toughness of solid solutions of Mg2Si and Mg2Sn. Fizika i Tekhnika Poluprovodnikov. Izdatel'stvo Nauka. doi: 10.1134/s1063782619130098. ISSN 0015-3222.
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Kurzfassung
Thermoelectric material development typically aims at maximizing produced electrical power and efficiency of energy conversion, even though sometimes, this means adding expensive or toxic materials. An alternative is to use highly available and low toxic silicides. In fact, magnesium silicide and magnesium stannide have low densities (1.99 and 3.49 g/cm3 respectively), and exhibit good thermoelectric properties with their thermoelectric figure of merit zT>1 for n-type and near 0.6 for ptype Mg2Si-Mg2Sn solid solutions in the range of 723-773 K. These properties turn the materials into logical candidates for light-weight and efficient thermoelectric generators (TEG). The research on their mechanical properties is however lagging behind and little effort has been put into understanding them. In this work we study the effect of the composition over the Mg2Si-Mg2Sn solid solution series on hardness and fracture toughness values. Hardness ranges from 2.44-5.56 GPa whereas fracture toughness values are in a tighter range (0.64-0.88 MPam1/2). However, the highest value does not belong to binary Mg2Si but a composition within the solid solution that exhibits secondary phase nanostructuring.
elib-URL des Eintrags: | https://elib.dlr.de/130696/ | ||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||
Titel: | Hardness and fracture toughness of solid solutions of Mg2Si and Mg2Sn | ||||||||||||||||||||||||
Autoren: |
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Datum: | 2019 | ||||||||||||||||||||||||
Erschienen in: | Fizika i Tekhnika Poluprovodnikov | ||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||
DOI: | 10.1134/s1063782619130098 | ||||||||||||||||||||||||
Verlag: | Izdatel'stvo Nauka | ||||||||||||||||||||||||
ISSN: | 0015-3222 | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | Hardness; fracture toughness; solid solutions; Magnesium Silicide; Magnesium Stannide | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||
HGF - Programm: | Verkehr | ||||||||||||||||||||||||
HGF - Programmthema: | Straßenverkehr | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Verkehr | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | V ST Straßenverkehr | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | V - NGC Antriebssystem und Energiemanagement (alt) | ||||||||||||||||||||||||
Standort: | Köln-Porz | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Thermoelektrische Materialien und Systeme | ||||||||||||||||||||||||
Hinterlegt von: | Yasseri, Mohammad | ||||||||||||||||||||||||
Hinterlegt am: | 18 Nov 2019 11:12 | ||||||||||||||||||||||||
Letzte Änderung: | 08 Nov 2023 10:37 |
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