Archivio Istituzionale della RicercaA Mg2Si-Mg2Sn based thermoelectric material (TE), with composition of Mg2Si0.487Sn0.5Sb0.013, produced by ball-milling combined with spark plasma sintering, is successfully coated with a new silica-based glass, which is specifically designed, characterised and tested as an oxidation protective coating for mid-temperature range (up to 500 °C) applications. Despite the relatively high coefficient of thermal expansion (CTE) of Mg2(Si,Sn) based materials, very good thermo-mechanical compatibility between the substrate and the coating material is obtained. Oxidation tests, performed at 500 °C for 120 hrs in air, demonstrate the effectiveness of the glass coating for the protection of Sb doped Mg2(Si,Sn) thermoelectric materials.
Oxidation protective glass coating for magnesium silicide based thermoelectrics / D'Isanto, Fabiana; Smeacetto, Federico; Reece, Michael John; Chen, Kan; Salvo, Milena. - In: CERAMICS INTERNATIONAL. - ISSN 0272-8842. - STAMPA. - 46:15(2020), pp. 24312-24317. [10.1016/j.ceramint.2020.06.212]
Oxidation protective glass coating for magnesium silicide based thermoelectrics
D'Isanto, Fabiana;Smeacetto, Federico;Salvo, Milena
2020
Abstract
A Mg2Si-Mg2Sn based thermoelectric material (TE), with composition of Mg2Si0.487Sn0.5Sb0.013, produced by ball-milling combined with spark plasma sintering, is successfully coated with a new silica-based glass, which is specifically designed, characterised and tested as an oxidation protective coating for mid-temperature range (up to 500 °C) applications. Despite the relatively high coefficient of thermal expansion (CTE) of Mg2(Si,Sn) based materials, very good thermo-mechanical compatibility between the substrate and the coating material is obtained. Oxidation tests, performed at 500 °C for 120 hrs in air, demonstrate the effectiveness of the glass coating for the protection of Sb doped Mg2(Si,Sn) thermoelectric materials.
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https://hdl.handle.net/11583/2837885