Gas permeation behaviour through atmospheric plasma-sprayed 8mol% yttria

stabilized zirconia electrolyte coating was studied experimentally. Yttria-stabilized

zirconia 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 yttria stabilized zirconia coating

was studied. Transition flow was compatible to gas permeation behaviour for all

three plasma-sprayed photoluminescence coatings.

Study on Gas Permeation Behaviour Through Atmospheric Plasma-Sprayed Yttria

Stabilized Zirconia Coating. C.Zhang, W.Y.Li, M.P.Planche, C.X.Li, H.Liao,

C.J.Li, C.Coddet: Surface and Coatings Technology, 2008, 202[20], 5055-61