Microstructure and electrical properties of plasma sprayed Gd0.15Ce0.85O2-8 coatings from solution combustion synthesized flowable powders

Shri Prakash , B and Bera, Parthasarathi and Senthil Kumar, S and Aruna, ST (2016) Microstructure and electrical properties of plasma sprayed Gd0.15Ce0.85O2-8 coatings from solution combustion synthesized flowable powders. Journal of the European Ceramic Society, 37 . pp. 271-279. ISSN 0955-2219

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    Abstract

    tPowders of Gadolinia doped Ceria (Gd0.15Ce0.85O2-�(GDC)), a promising electrolyte material for inter-mediate temperature solid oxide fuel cell has been prepared by solution combustion (SC) synthesis.Variation of fuel to oxidizer ratio in the synthesis results in the GDC powder with varied powder charac-teristics. Fuel deficient combustion reaction results in GDC powder with smaller crystallites size but withlarger agglomerates; whereas reaction with near stochiometric amount of fuel leads to the GDC powderwith larger crystallite size and smaller agglomerates. Powders with large agglomerates possess requiredparticle size, shape and flowability characteristics appropriate for plasma spraying. Electrolyte coatingsfabricated from the synthesized plasma spray grade powders exhibit superior inter splat adhesion andconductivity (∼0.02 S/cm at 600◦C). Dense nature of the coating is ascribed to the complete melting ofthe porous GDC particles in the plasma flame. Powders prepared with stochiometric fuel are suitable fortape casting process.

    Item Type: Journal Article
    Additional Information: Copyright for this article belongs to M/s. Elsevier Science Ltd
    Uncontrolled Keywords: Solution combustion reaction;Agglomeration;Plasma spraying; Ionic conductivity
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    ENGINEERING > Electronics and Electrical Engineering
    Division/Department: Surface Engineering Division, Surface Engineering Division, Surface Engineering Division, Surface Engineering Division
    Depositing User: Ms. Alphones Mary
    Date Deposited: 17 Jan 2017 11:19
    Last Modified: 17 Jan 2017 11:19
    URI: http://nal-ir.nal.res.in/id/eprint/12525

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