Microstructure and electrical properties of plasma sprayed Gd0.15Ce0.85O2-8 coatings from solution combustion synthesized flowable powders
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
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Title |
Microstructure and electrical properties of plasma sprayed Gd0.15Ce0.85O2-8 coatings from solution combustion synthesized flowable powders
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Creator |
Shri Prakash , B
Bera, Parthasarathi Senthil Kumar, S Aruna, ST |
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Subject |
Chemistry and Materials (General)
Electronics and Electrical Engineering |
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Description |
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.
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Publisher |
Elsevier Science Ltd
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Date |
2016
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Type |
Journal Article
PeerReviewed |
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Format |
application/pdf
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Identifier |
http://nal-ir.nal.res.in/12525/1/JECS%2Dpublished_paper.pdf
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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Relation |
http://dx.doi.org/10.1016/j.jeurceramsoc.2016.07.030
http://nal-ir.nal.res.in/12525/ |
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