Effect of in-flight particle velocity on the performance of plasma-sprayed YSZ electrolyte coating for solid oxide fuel cells

Effect of Microstructure on the Thermal Conductivity of Plasma Sprayed Y2O3 Stabilized Zirconia (8% YSZ)

“…found that, with increasing particle velocity and temperature, the coating is densified and the thermal conductivity increases [14,15]. The quantitative effect of grain boundaries on the thermal conductivity was analyzed, showing that the thermal conductivity of small grains is lower than that of large grains [16][17][18].…”

Deposition of nanostructured YSZ coating from spray-dried particles with no heat treatment

“…A theoretical study on the behaviour of porous particles in the plasma plume conducted by Hurevich et al [20] shows that the heat transfer between the plasma jet and in-flight particles was hindered by the porous nature of the agglomerated particles. Experimental studies regarding the influences of feedstock powder characteristics on particle temperature and velocity manifested that the size, shape, flow ability, and specific mass [21,22] of the feedstock powder greatly affects its aerodynamic behaviour, including the flattening degree of molten droplets, the adhesion/cohesion of splats, and, in the end, influences the coating structure [23][24][25]. Therefore, the characteristics of feedstock powder are also important factors in the retention of the original nanostructure in the as-sprayed coatings, which cannot be neglected.…”

Effect of Microstructure on the Thermal Conductivity of Plasma Sprayed Y₂O₃ Stabilized Zirconia (8 %YSZ)

“…The thermal conductivity of monoclinic zirconia is higher than the tetragonal and cubic phases [11][12][13] . Some studies investigated the relationship between the spray process and the microstructure of the thermal barrier coating 14,15 . It was found that with increasing particle velocity and temperature the coating is densified and the thermal conductivity increases 14,15 .…”

“…Some studies investigated the relationship between the spray process and the microstructure of the thermal barrier coating 14,15 . It was found that with increasing particle velocity and temperature the coating is densified and the thermal conductivity increases 14,15 . The quantitative effect of grain boundaries on the thermal conductivity was analyzed which shows that the thermal conductivity of small grains is lower compared to large grains [16][17][18] .…”