Ingegrated Study of APS YSZ Coatings with Different Spray Angle

Spray parameters play an important role in the property of plasma sprayed coatings during coating deposition, such as spray distance, plasma gas flow and current, raster speed and spray angle. In this paper, an integrated study about effect of spray angle on property of YSZ coating was carried out, with 90°, 75°, 60° and 45° being chosen to investigate its influences. In situ coating property sensor (ICP) was applied during coating deposition to measure residual stresses and elastic moduli in the coating, combined with other characterization tools for thermophysical property and microstructure analysis, such as laser flash and SEM. It turned out that the coating with 75° spray angle had the highest elastic modulus and largest deposition efficiency (DE). This work is aiming to explain the mechanism for this effect and is expected to provide a valid approach to the study of other important spray parameters in thermal spray.