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J. Korean Ceram. Soc. > Volume 61(3); 2024 > Article
Journal of the Korean Ceramic Society 2024;61(3): 500-506.
doi: https://doi.org/10.1007/s43207-024-00373-1
High-temperature oxidation-resistant glass–ceramic/YSZ composite coatings for gas turbine engine applications
K. Parthiban1,2, Sumana Ghosh1
1Bio-Ceramics and Coating Division, CSIR-Central Glass and Ceramic Research Institute (CSIR-CGCRI), 196, Raja S.C. Mullick Road, Kolkata 700032, India
2Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
Correspondence  Sumana Ghosh ,Email: sumana@cgcri.res.in
Received: July 31, 2023; Revised: January 9, 1949   Accepted: January 16, 2024.  Published online: February 22, 2024.
ABSTRACT
Oxidation behavior of a novel double-layered thermal barrier coating (TBC) system consisting of glass–ceramic–25 wt.% yttria-stabilized zirconia (YSZ) bond coat and 8 wt.% YSZ top coat was investigated at 900 °C and 1000 °C for 100 h. Developed TBC system showed changes in phase, microstructure, and mechanical properties with increasing temperature. Zircon formation in the glass–ceramic during oxidation (1000 °C, 100 h) enhanced oxidation resistance of the TBC system. Weight gain per unit surface area was about 0.085 mg/cm2 after 100 h at 1000 °C during oxidation test; whereas, it was much lower (~ 0.04 × 10–2  mg/cm2) at 900 °C after same period of time. Tetragonal zirconia (t-ZrO2) top coat changed to both cubic and tetragonal phases after 100-h exposure at 1000 °C. Nanohardness and Young’s modulus values of bond coat and top coat were increased with increasing temperature.
Key words: Glass–ceramics  · Composite  · Zircon  · Microstructure  · Mechanical property
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