Model on thermal conductivity prediction of quasi-columnar structured coating by plasma spray physical vapor deposition

Firstly, the yttria-stabilized zirconia (YSZ) coating and gadolinium zirconate (GZO) with quasi-columnar structure were manufactured by plasma spray physical vapor deposition. At same time, a novel three-dimensional geometrical model was established that could satisfactorily reflect such structural characteristics. Then, based on this model, spatial distribution of pores porosity coatings thermal resistance behaviors structured analyzed. Later on, thermodynamic to estimate conductivity at different temperatures. Finally, for predicting effective GZO/YSZ double-layer validated account effects variable thickness ratios GZO top layer YSZ inner layer.