Abstract
Oxide-based coating layers were investigated to suppress the oxidation of an intermediate temperature thermoelectric module that operates in a temperature range of 300–700°C. Four different oxides [alumina (Al2O3), yttria (Y2O3), 8mol% yttria-stabilized zirconia ((Y2O3)0.08(ZrO2)0.92, YSZ), and 20mol% samaria-doped ceria (Sm0.2Ce0.8O1.9, SDC)] were coated onto Mg2Si thermoelectric leg surfaces and their anti-oxidation characteristics were compared. While Al2O3, Y2O3, and SDC layers failed to prevent the progression of oxidation of the thermoelectric Mg2Si surface at 700°C, YSZ showed potential as an anti-oxidation coating layer for intermediate temperature thermoelectric modules. The apparent oxidation suppression characteristics of the YSZ layer on the Mg2Si thermoelectric material were studied by a microstructural investigation of the interface between the coated layer and the thermoelectric material. The reliability of the YSZ coating structure was investigated via thermal cycling tests from room temperature to 600°C. The practical adaptability of the YSZ anti-oxidation coating in terms of use for thermoelectric power-generation modules is discussed in detail with the results of variation in contact resistance.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
