Oxidation of Co- and Ce-nanocoated FeCr steels: A microstructural investigation
作者： S. Canovic , J. Froitzheim , R. Sachitanand , M. Nikumaa , M. Halvarsson
DOI: 10.1016/J.SURFCOAT.2012.08.096
关键词:
摘要: The effect of novel Co and Ce nanocoatings on oxidation behaviour chromium volatilization from a commercial Fe-22Cr steel (Sanergy HT) developed for solid oxide fuel cell interconnect applications is investigated. Three different coatings (10 nm Ce, 640 10 + Co) are studied. Uncoated nanocoated samples exposed isothermally at 850 C in the air with 3% H2O 168 h. detailed microstructure surface morphology scales characterized by using scanning electron microscopy (SEM), transmission (TEM), (STEM) energy dispersive X-ray analysis (EDX). Cross-section TEM thin foils prepared combined FIB/SEM (focused ion beam/scanning microscope) instrument. A cobalt coating strongly inhibits Cr but has only minor effects rate. In contrast, decreases rate no significant volatilization. Combining two coatings, i.e., applying top effectively reduces evaporation slows down alloy oxidation.
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