Title

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

Authors

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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