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Study on gas permeation behaviour through atmospheric plasma-sprayed yttria stabilized zirconia coating |
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| Authors: | Chao Zhang Wen-Ya Li Cheng-Xin Li Chang-Jiu Li |
| Affiliation: | a Laboratoire d'Etudes et de Recherches sur les Matériaux, les Procédés et les Surfaces, (LERMPS), Université de Technologie de Belfort-Montbéliard, 90010, Belfort, France b State Key Laboratory for Mechanical Behaviour of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, 710049, Shaanxi, China |
| Abstract: | Gas permeation behaviour through atmospheric plasma-sprayed 8 mol% yttria stabilized zirconia (YSZ) electrolyte coating was studied experimentally. YSZ coatings were fabricated using different powder feedstock. The temperature and velocity of in-flight particles during spraying were measured with a diagnostic system. The results showed that particle temperature and velocity were significantly influenced by the size of powders. The gas permeability of these coatings was estimated by a specific instrument with pure O2, N2 and H2. It was found that the gas permeability was reduced by decreasing the size of powder. Gas permeation behaviour through plasma-sprayed YSZ coating was studied. Transition flow was compatible to gas permeation behaviour for all three plasma-sprayed YSZ coatings. The relationship between gas permeation behaviour and coating microstructure is discussed in this article. |
| Keywords: | Zirconium oxide Plasma spraying Porosity Gas permeation behaviour |
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