High-temperature oxidation behavior of solution precursor plasma sprayed nanoceria coating on martensitic steels

    Authors

    V. Viswanathan; R. Filmalter; S. Patil; S. Deshpande;S. Seal

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    THERMAL BARRIER COATINGS; CORROSION; PROTECTION; DEPOSITION; MECHANISMS; PRESSURE; IRON; Materials Science, Ceramics

    Abstract

    Solution precursor plasma spray (SPPS) is used to deposit nanoceria coating on a 410 martensitic stainless steel. The process of pyrolysis in converting the cerium nitrate solution to cerium oxide, the microstructure and the surface chemistry is confirmed by thermodynamic calculations, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction. Subsequent exposure of the coated steel in atmospheric air to cyclic oxidation at 1000 degrees C revealed excellent corrosion resistance of the steel in presence of the SPPS-processed nanoceria coating. The formation of the nanostructured (10-100 nm) ceria coating is studied using transmission electron microscopy. Relative Ce4+ and Ce3+ concentration in the coating was determined from XPS high-resolution spectrum. Cross-section scanning electron microscopy showed the presence of an impervious nature of the protective layer with reduced scale thickness in the coated-oxidized sample. After a pre-oxidation treatment at 1273 K of the coated specimen, the oxidation kinetics showed a significant decrease as compared with the uncoated martensitic steel.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    90

    Issue/Number

    3

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    870

    Last Page

    877

    WOS Identifier

    WOS:000244720100032

    ISSN

    0002-7820

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