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- W2035612462 abstract "Doped cobalt antimonides, are used as components of thermoelectric devices at temperatures not exceeding 450 °C because of poor thermal and chemical stability. In absence of oxygen they degrade by sublimation of antimony, while in air they easily oxidize to form volatile antimony oxides and non-volatile thick double oxide scales [1]. In both cases, protective coatings are indispensable to ensure safe performance of thermoelectric devices over extended times. The most promising solution, reported so far, is a thick aerogel coating, which practically stops antimony loss by sublimation. The assessment of coating effectiveness is generally based on thermogravimetric tests in vacuum, so permeability of oxygen and protection from oxidation cannot be evaluated. The paper presents investigations on the development of protective coatings, which would prevent oxidation of CoSb3. Two types of coatings were applied: magnetron sputtered Cr-Si thin layers [2] and thick enamel layers. Testing involved interrupted oxidation in air for 20-80 h at 500 °C and 600 °C. The Cr-Si thin layers appeared oxygen-tight at 500 °C while the enamel layers - even at 600 °C." @default.
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- W2035612462 date "2012-01-01" @default.
- W2035612462 modified "2023-09-23" @default.
- W2035612462 title "Oxidation resistant coatings for CoSb3" @default.
- W2035612462 doi "https://doi.org/10.1063/1.4731539" @default.
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