Investigation of Plasma Coatings Manufactured from Synthesized Zirconia
Keywords:ceramic powder, YSZ, plasma spraying, coating, microstructure.
This paper studies the influence of feedstock material characteristics on the plasma coating properties. Yttria-stabilized zirconia (YSZ) coatings with the thickness up to 60 μm were prepared by plasma-spray technique on the stainless steel substrates employing non-equilibrium plasma spray technology at atmospheric pressure. The precipitation method has been used to prepare precursor ceramic powder. The characteristics of synthesized powders and sprayed samples were evaluated depending on the calcination temperature of synthesized initial powder. The data of scanning electron microscopy (SEM) revealed uniform fine-grained microstructure with grain size < 0.5 μm. The cubic phase with nano-sized crystalittes has been found to dominate in the plasma sprayed coatings
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