Effect of Feedstock Powders on the Microstructural and Electrical Characteristics of 8 mol% Yttria-Stabilized Zirconia Plasma-Sprayed Coatings

Shri Prakash , B and Balaji, N and William Grips, VK and Aruna, ST (2011) Effect of Feedstock Powders on the Microstructural and Electrical Characteristics of 8 mol% Yttria-Stabilized Zirconia Plasma-Sprayed Coatings. Journal of Thermal Spray Technology, 21 (6). pp. 1300-1308. ISSN 1059 9630

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    Abstract

    Plasma-sprayed coatings of 8 mol% yttria-stabilized zirconia (YSZ) were fabricated using the feedstock powders obtained from co-precipitation (PPT) and spray-drying (SD) processes. Particle size and the specific mass (SM) of the feedstock powder were found to be the critical parameters that influence the microstructural and electrical properties of the coatings. While dense and larger particle-sized PPT powder resulted in a porous microstructure, dense coatings were obtained for SD powders with relatively lower SM. Electrical conductivity values of SD-coatings were found to be 30% higher than that of PPTcoatings. Electrical conductivity values of plasma-sprayed PPT-coatings improved significantly on decreasing the particles size. However, the size effect was only subtle in the case of SD coatings. PPTcoatings fabricated from smaller particle-sized powders had the necessary electrical conductivities appropriate for solid oxide fuel cell electrolyte applications

    Item Type: Journal Article
    Uncontrolled Keywords: co-precipitation, electrical conductivity, impedance spectroscopy, plasma spraying, solid oxide fuel cell
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Surface Engineering Division, Surface Engineering Division, Surface Engineering Division, Surface Engineering Division
    Depositing User: Ms Indrani V
    Date Deposited: 05 Dec 2012 11:53
    Last Modified: 05 Dec 2012 11:53
    URI: http://nal-ir.nal.res.in/id/eprint/11387

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