Articles
  • ZrO2 and Y2O3-stablized ZrO2 coatings deposited using an arc ion plating technique
  • Qi Min Wanga,b,*, Jun Gonga, Chao Suna, Hyung Woo Leeb and Kwang Ho Kimb,*
  • aDivision of Surface Engineering Materials, Institute of Metal Research, 72 Wenhua Road, Shenyang, P.R. China bNational Core Research Center for Hybrid Materials Solution, Pusan National University, Busan 609-735, South Korea
Abstract
ZrO2 and Y2O3-stablized ZrO2 (YSZ) coatings were deposited on NiCoCrAlY coated superalloys using an arc ion plating system. The crystalline structure, chemical composition, and morphology of the coatings were systematically investigated using X-ray diffraction, X-ray photoelectron spectroscopy, as well as scanning electron microscopy. The thermal stability of YSZ coatings were investigated by oxidation and thermal shock tests. The results showed that near-stoichiometric ZrO2 coatings can be obtained at a relatively large range of O2 flow rates (134-400 sccm), with the main phase of monolithic zirconia being identified. YSZ coatings exhibited excellent thermal stability in the oxidation and thermal shock tests. Before and after thermal tests, only the tetragonal zirconia (t-ZrO2) phase was identified in the YSZ coatings.

Keywords: ZrO2 coating, Arc ion plating, Phase structure,; Thermal stability, Thermal shock resistance.

This Article

  • 2011; 12(3): 259-264

    Published on Jun 30, 2011

Correspondence to

  • E-mail: