Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
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Plasma-sprayed anisotropic mille-feuille-like porous 3.9YSZ coatings for solid oxide fuel cell electrodes
Hann-Pyng WUKuan-Zong FUNG
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2012 Volume 120 Issue 1401 Pages 186-192

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Abstract

A porous coating process is presented for solid oxide fuel cell electrodes that reduce manufacturing costs and production time. The process used aluminum as a pore-former for creating anisotropic mille-feuille-like porosity in plasma-sprayed 3.9 mol. % yttria-stabilized zirconia (3.9YSZ) coatings. After etching, almost no aluminum phase can be detected by X-ray diffraction and the porous coating hardness decreases to below 40 HR15Y. A porosity of between 44.5 and 50.4 vol. % is obtained in the etched porous plasma-sprayed coating. Most of the monoclinic phase originally in the 3.9YSZ feedstock powder is suppressed after plasma spraying.

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© 2012 The Ceramic Society of Japan
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