Oxidation resistance of iron-based coatings by supersonic arc spraying at high temperature
作者： Yujie Li , Tianquan Liang , Run Ao , Hang Zhao , Xiyong Chen
DOI: 10.1016/J.SURFCOAT.2018.04.024
关键词:
摘要: Abstract The high-temperature oxidation behavior of three kinds iron-based coatings prepared by supersonic arc spraying (HVAS) was investigated in this paper. characterization the microstructures, surface morphologies and chemical compositions for before after high temperature at 800 °C 900 °C were analyzed optical microscopy (OM), scanning electron (SEM), energy-dispersive spectroscope (EDS) X-ray diffraction (XRD). It illustrated that FeCrAlTiCRE coating had best resistance among coatings. After oxidation, a dense compact oxide layer formed on coating, which composed Cr2O3 Al2O3. film mainly Fe2O3 100 h 800 °C, while it Fe3O4, Al2O3 exposure 100 h. FeCr(C, RE) spinel crystal FeCr2O4 also showed protective effect temperature. Fe(Cr3C2, loose porous Fe3O4 small amount because there little Cr Al. mechanism, thermodynamic kinetic analysis during failure process discussed.
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