Solution precursor thermal spraying of gadolinium zirconate for thermal barrier coating

Leng, K.; Rincon Romero, A.; Venturi, F.; Ahmed, I.; Hussain, T.

doi:10.1016/j.jeurceramsoc.2021.11.050

Solution precursor thermal spraying of gadolinium zirconate for thermal barrier coating

Leng, K.; Rincon Romero, A.; Venturi, F.; Ahmed, I.; Hussain, T.

Authors

K. Leng

A. Rincon Romero

Dr FEDERICO VENTURI FEDERICO.VENTURI@NOTTINGHAM.AC.UK
Assistant Professor in Materials & Aerospace Engineering

Professor IFTY AHMED ifty.ahmed@nottingham.ac.uk
PROFESSOR OF MATERIALS SCIENCE AND ENGINEERING

Professor TANVIR HUSSAIN TANVIR.HUSSAIN@NOTTINGHAM.AC.UK
PROFESSOR OF COATINGS AND SURFACE ENGINEERING

Abstract

Gadolinium zirconate (GZ) is an attractive material for thermal barrier coatings (TBCs). However, a single layer GZ coating has poor thermal cycling life compared to Yttria Stabilized Zirconia (YSZ). In this study, Solution Precursor High Velocity Oxy-Fuel (SP-HVOF) thermal spray was used to produce a double layer GZ/YSZ TBC and compared the thermal cycling performance with the single layer YSZ TBC. The temperature behaviour of the solution precursor GZ was studied, and single splat tests were carried out to obtain an optimised spray parameter. In thermal cycling tests, the single-layer YSZ reached 20 % failure at 85 ± 5 cycles, whereas the double-layer GZ/YSZ was at 70 ± 15 cycles. The single-layer failed at the topcoat/TGO interface, whereas the double-layer failed at GZ/YSZ interface and topcoat/TGO interface. Moreover, Gd diffusion occurred near the GZ/YSZ interface, resulting in porosities in the GZ layer.

Citation

Leng, K., Rincon Romero, A., Venturi, F., Ahmed, I., & Hussain, T. (2022). Solution precursor thermal spraying of gadolinium zirconate for thermal barrier coating. Journal of the European Ceramic Society, 42(4), 1594-1607. https://doi.org/10.1016/j.jeurceramsoc.2021.11.050

Journal Article Type	Article
Acceptance Date	Nov 23, 2021
Online Publication Date	Nov 25, 2021
Publication Date	2022-04
Deposit Date	Dec 10, 2021
Publicly Available Date	Dec 10, 2021
Journal	Journal of the European Ceramic Society
Print ISSN	0955-2219
Electronic ISSN	1873-619X
Publisher	Elsevier
Peer Reviewed	Peer Reviewed
Volume	42
Issue	4
Pages	1594-1607
DOI	https://doi.org/10.1016/j.jeurceramsoc.2021.11.050
Keywords	Materials Chemistry; Ceramics and Composites
Public URL	https://nottingham-repository.worktribe.com/output/6916273
Publisher URL	https://www.sciencedirect.com/science/article/pii/S095522192100858X?via%3Dihub