Affiliation:
1. Shenyang University of Technology
Abstract
The coating was made of base coating (NiCrAlY) and superficial coating (ZrO2 + Y2O3) by plasma spray. The microstructure and phase structure of the coating were investigated by using the scanning electron microscope and the X-ray diffraction. The oxidation process can be divided into three stages: The main oxidation products is θ-Al2O3 but not continuous α-Al2O3 film in oxidation prophase; Continuous α-Al2O3 film generated quickly with the transition of θ-Al2O3 to α-Al2O3 in the oxidation reaction. The oxidation reaction becomes complicated when the content of Al decrease and Ni is also oxidized to NiO. Oxidation kinetics curves of 1200°C is basically accord with parabolic law.
Publisher
Trans Tech Publications, Ltd.
Reference6 articles.
1. J. W. Fairbanks and R. J. Hecht, Mater. Sci. Eng Vol. 88 (1987), p.321.
2. R. Keribar and T. Morel, Surf. Coatings Technol Vol. 30 (1987), p.63.
3. D. J. Wortman, B. A. Nagaraj, and E. C. Duderstadt, Mater. Sci. Eng Vol. 121 (1989), p.433.
4. Jiacai An, Sanming Du, Hongbin Xiao. China surface engineering Vol. 24 (2011), pp.20-23.
5. Guo S, Kagawa Y. Ceramics International Vol. 32(3) 2006, pp.263-270.