Variety Behavior in Spraying Process of Nanoparticles Agglomerated YSZ Powder by APS

In this paper, the variety behavior in spraying process of nanoparticle agglomerated ZrO2 −8% Y2O3 (YSZ)powder by air plasma spraying(APS) is studied. The morphology, microscopic structure and phase structure of sprayed powder were analyzed by SEM and XRD. The result indicates that the agglomerated particle surface happens to melt and be crystallization by APS sprayed, and the grain size is 0.5∼1.5μm. The molten zone thickness increases gradually as the particle diameter reduces. The particle inside still keeps nanoparticle structure. The phase structure accords with the powder before spraying.