Study on gas permeation behaviour through atmospheric plasma-sprayed yttria stabilized zirconia coating

  • Chao Zhang
  • , Wen Ya Li
  • , Marie Pierre Planche
  • , Cheng Xin Li
  • , Hanlin Liao
  • , Chang Jiu Li
  • , Christain Coddet

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

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.

Original languageEnglish
Pages (from-to)5055-5061
Number of pages7
JournalSurface and Coatings Technology
Volume202
Issue number20
DOIs
StatePublished - 15 Jul 2008
Externally publishedYes

Keywords

  • Gas permeation behaviour
  • Plasma spraying
  • Porosity
  • Zirconium oxide

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