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

Singh, Virendra and Karakoti, Ajay and Kumar, Amit and Saha, Abhishek and Basu, Saptarshi and Seal, Sudipta (2010) Precursor Dependent Microstructure Evolution and Nonstoichiometry in Nanostructured Cerium Oxide Coatings Using the Solution Precursor Plasma Spray Technique. In: Journal of the American Ceramic Society, 93 (11). pp. 3700-3708.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1551-...

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 Ce3+ (up to 0.32) in the coating prepared by SPPS. The processing and microstructure evolution of cerium oxide coatings with high nonstoichiometry are reported.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 21 Dec 2010 09:22
Last Modified: 21 Dec 2010 09:22
URI: http://eprints.iisc.ernet.in/id/eprint/34559

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