Journal of Inorganic Materials ›› 2010, Vol. 25 ›› Issue (8): 860-864.doi: 10.3724/SP.J.1077.2010.00860

• Research Paper • Previous Articles     Next Articles

Preparation and High-temperature Properties of Nanostructured CeO2/ZrO2-Y2O3 Thermal Barrier Coating

GONG Wen-Biao1, LI Yu-Peng1, LIU Wei1, SUN Da-Qian2, WANG Wen-Quan2   

  1. (1. Key Laboratory of Advanced Structrural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China; 2. School of Materials Science and Engineering, Jilin University, Changchun 130025, China)
  • Received:2009-11-09 Revised:2010-03-11 Online:2010-08-20 Published:2010-07-19
  • Contact: GONG Wen-Biao E-mail:gwbiao@sina.com

Abstract:

The nanosized ZrO2-8wt%Y2O3 (YSZ) and CeO2/ZrO2-8wt%Y2O3(CYZ) particles were agglomerated as powder feedstocks. Thermal barrier coatings were prepared on the GH30 high temperature alloy surface by atmospheric plasma spray. The microstructures of the agglomerated powders doped with 25wt% CeO2 particles and the coating were characterized using scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD) technology. The thermal shocks resistance of the ZrO2-8wt%Y2O3 (YSZ) and CeO2/ZrO2-8wt%Y2O3 (CYZ) coatings were tested at 900℃,1100℃ and 1300℃. The oxidation resistance testing of coatings were tested at 1050℃ for 100h. The results show that the nano-powder by agglomerated treatment is porous spherical. The phase compositons of the nano-CYZ coating are relatively stable t phase (t-ZrO2, t-Zr0.82Y0.18O1.91, t-Zr0.82Ce0.18O2) and c phase (c-CeO2). The average grain size of the CYZ coating is about 45nm. The nanostructured CeO2/ZrO2-Y2O3 coating exhibit higher thermal-shock and oxidation resistances than those of the nano-YSZ coating.

Key words: thermal barrier coatings, plasma spray, nanostructured, thermal shocks resistance, isothermal oxidation

CLC Number: 

  • TB383