Influence of Substrate Shape and Roughness on Coating Microstructure in Suspension Plasma Spray

被引：14
作者：
Caio, Fernanda [1 ,2 ]
Moreau, Christian [1 ]
机构：
[1] Concordia Univ, Dept Mech Ind & Aerosp Engn, Montreal, PQ H3G 1M8, Canada
[2] Polycontrols Technol, Brossard, PQ J4Y 2Z2, Canada
来源：
COATINGS | 2019年 / 9卷 / 11期
关键词：
suspension plasma spray; substrate geometry; surface roughness; columnar structure; THERMAL BARRIER COATINGS; IN-FLIGHT PARTICLES; COLUMNAR MICROSTRUCTURE; PERFORMANCE;
D O I：
10.3390/coatings9110746
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study investigated the influence of the substrate shape and roughness on the microstructure of suspension plasma spray (SPS) coatings. For this purpose, an yttria-stabilized zirconia (YSZ) suspension was sprayed on flat and curved stainless-steel substrates by SPS. The suspension was composed of 20 wt.% YSZ particles in ethanol. After spraying, the morphology of the coatings was characterized by scanning electron microscopy (SEM). The results showed that the substrate shape influences the amount of coating material deposited and microstructural features of the coating. The amount of coating material deposited was seen to decrease as the radius of curvature decreased. Finally, the roughness was found to influence the formation of columnar structure.
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页数：18
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