TY - JOUR
T1 - Water vapor corrosion behaviours of nanostructured Yb2O3-Yb2SiO5/mullite/Si environmental barrier coatings
AU - Xiao, Fei
AU - Yan, Mufu
AU - Wang, You
AU - Tang, Shawei
AU - Liu, Ming
AU - Zhang, Xiaodong
N1 - Publisher Copyright:
© 2024 Elsevier Ltd and Techna Group S.r.l.
PY - 2025/1
Y1 - 2025/1
N2 - In this work, the nanostructured Yb2O3-Yb2SiO5/mullite/Si environmental barrier coatings (EBCs) were designed and prepared by atmospheric plasma spraying. The water vapor corrosion behavior of coatings was investigated at a temperature of 1350 °C for durations ranging from 100 to 500 h, and the influence of phase compositions, microstructure on this behavior was systematically investigated. The results indicate that phase transformation occurs during the water vapor corrosion process, and severe corrosion takes place at the Yb2O3-Yb2SiO5 top coating and the mullite intermediate layer. Obvious diffusion reaction between Yb2O3-Yb2SiO5 and mullite layers occurred without water vapor, while the diffusion reaction cannot be observed under water vapor. The water vapor corrosion mechanism of EBCs is mainly attributed to residual thermal mismatch stresses, phase transformation resulting from sintering of Yb2O3-Yb2SiO5, as well as the formation of TGO by oxidation.
AB - In this work, the nanostructured Yb2O3-Yb2SiO5/mullite/Si environmental barrier coatings (EBCs) were designed and prepared by atmospheric plasma spraying. The water vapor corrosion behavior of coatings was investigated at a temperature of 1350 °C for durations ranging from 100 to 500 h, and the influence of phase compositions, microstructure on this behavior was systematically investigated. The results indicate that phase transformation occurs during the water vapor corrosion process, and severe corrosion takes place at the Yb2O3-Yb2SiO5 top coating and the mullite intermediate layer. Obvious diffusion reaction between Yb2O3-Yb2SiO5 and mullite layers occurred without water vapor, while the diffusion reaction cannot be observed under water vapor. The water vapor corrosion mechanism of EBCs is mainly attributed to residual thermal mismatch stresses, phase transformation resulting from sintering of Yb2O3-Yb2SiO5, as well as the formation of TGO by oxidation.
KW - Atmospheric plasma spraying
KW - High temperature water vapor corrosion
KW - Nanostructured EBCs
KW - YbO-YbSiO
UR - http://www.scopus.com/inward/record.url?scp=85208761149&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2024.10.456
DO - 10.1016/j.ceramint.2024.10.456
M3 - Article
AN - SCOPUS:85208761149
SN - 0272-8842
VL - 51
SP - 279
EP - 289
JO - Ceramics International
JF - Ceramics International
IS - 1
ER -