Precursor Dependent Microstructure Evolution and Nonstoichiometry in Nanostructured Cerium Oxide Coatings Using the Solution Precursor Plasma Spray Technique

    Authors

    V. Singh; A. Karakoti; A. Kumar; A. Saha; S. Basu;S. Seal

    Comments

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    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    THERMO-PHYSICAL PROCESSES; BARRIER COATINGS; MIXED OXIDES; DROPLETS; CEO2; DECOMPOSITION; NANOPARTICLES; ELECTROLYTES; SUSPENSION; PARTICLES; Materials Science, Ceramics

    Abstract

    A solution precursor plasma spray (SPPS) technique has been used for direct deposition of cerium oxide nanoparticles (CNPs) from various cerium salt solutions as precursors. Solution precursors were injected into the hot zone of a plasma plume to deposit CNP coatings. A numerical study of the droplet injection model has been employed for microstructure development during SPPS. The decomposition of each precursor to cerium oxide was analyzed by thermogravimetric-differential thermal analysis and validated by thermodynamic calculations. The presence of the cerium oxide phase in the coatings was confirmed by X-ray diffraction studies. Transmission electron microscopy studies confirmed nanocrystalline (grain size < 14 nm) characteristic of the coatings. X-ray photoelectron spectroscopy studies indicated the presence of a high concentration of Ce(3+) (up to 0.32) in the coating prepared by SPPS. The processing and microstructure evolution of cerium oxide coatings with high nonstoichiometry are reported.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    93

    Issue/Number

    11

    Publication Date

    1-1-2010

    Document Type

    Article

    Language

    English

    First Page

    3700

    Last Page

    3708

    WOS Identifier

    WOS:000283987400037

    ISSN

    0002-7820

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