Characterization of ceria–yttria stabilized zirconia plasma-sprayed coatings

Abstract

Ceria–yttria stabilized zirconia (CYSZ) coatings were prepared by air plasma-sprayed on the nickel alloy. The as-sprayed CYSZ coatings and heat-treated CYSZ coatings were characterized by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The XPS data indicated the coexistence of Ce 3+, Ce 4+, Y 3+ and Zr 4+ ions near the surface of the as-sprayed CYSZ coatings and the disappearance of Ce 3+ ions in the CYSZ coatings after thermal treatment at 1000 °C for 15 h. From the XRD patterns, the solid solution of CeO 2–Y 2O 3–ZrO 2 formed in the CYSZ coatings because of the lack of any features from Y 2O 3 and ZrO 2 single phases. After thermal treatment, the main phases of all the samples were consistent with the characteristic peaks of cubic ZrO 2.