Characterization of ceria–yttria stabilized zirconia plasma-sprayed coatings

✍ Scribed by Bin Ma; Yao Li; Ke Su

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 157 KB
• Volume: 255
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2009.03.071

✦ Synopsis

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 8C for 15 h. From the XRD patterns, the solid solution of CeO 2 -Y 2 O 3 -ZrO 2 formed in the CYSZ coatings because of the lack of any features from Y 2 O 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 .