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1344 |
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Tuesday, June 03, 2008, Room 05 11:30 AM Case Studies and Further Applications 1 Showing the broad variety of thermal spraying in different examples, special processes and also specialized materials apart from standard coatings offer new possibilities and also new markets |
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Study on gas permeation behavior through atmospheric plasma sprayed yttria stabilized zirconia coating |
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Hanlin Liao / LERMPS - UTBM, France Chao Zhang / LERMPS, University of Technology of Belfort-Montbéliard, France G. Wei*/ , Christian Coddet/ LERMPS, University of Technology of Belfort-Montbéliard, France Changjiu Li/ State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , China C.-X. Li/ State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, China G.-J. Yang/ State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , China |
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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. 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 size of powders. 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. Relationship between gas permeation behaviour and coating microstructure is discussed in this article. |