Sol-gel synthesis and characterization of ZrO2-25wt.%CeO2-2.5wt.%Y2O3 (CYSZ) nanoparticles

This study is intended to improve the high-temperature properties of micro-CYSZ: ZrO2-25 wt%CeO2-2.5 wt%Y2O3 in order to apply it in new generation of thermal barrier coatings (TBCs) through substituting micro-CYSZ with nano-CYSZ. Nano-CYSZ was synthesized by sol-gel method followed by calcination f...

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Bibliographic Details
Published in:Ceramics international 2020-09, Vol.46 (13), p.21284-21291
Main Authors: Keyvani, A., Bahamirian, M., Esmaeili, B.
Format: Article
Language:English
Subjects:
Phase stability
Sol-gel method
T'-ZrO2
Thermal barrier coatings (TBCs)
ZrO2-25wt.%CeO2-2.5wt.%Y2O3
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Summary:This study is intended to improve the high-temperature properties of micro-CYSZ: ZrO2-25 wt%CeO2-2.5 wt%Y2O3 in order to apply it in new generation of thermal barrier coatings (TBCs) through substituting micro-CYSZ with nano-CYSZ. Nano-CYSZ was synthesized by sol-gel method followed by calcination for 3 h at 1000 °C, and subsequently underwent a heat treatment at 1300 °C for 50 h. Results obtained from Fourier-transform infrared spectroscopy (FTIR) and thermogravimetry/differential scanning calorimetry (TGA/DSC) indicated the formation of Zr–Y–Ce bonds, and proper calcination at 1000 °C, respectively. The microstructure and morphology of the product was studied by field emission scanning electron microscopy (FESEM), revealing the formation of CYSZ nanoparticles with the mean size of 40 nm. X-ray diffraction (XRD) and Raman analysis also confirmed the formation of non-transformable (t') ZrO2 phase (ca2
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2020.05.219