@article{Li2025, 
author = {Jie Li and Luchao Sun and Tiefeng Du and Yang Cui and Jialin Li and Jingyang Wang},
title = {High temperature interaction of Y4Al2O9/Y2O3 under CMAS exposure: Mechanism of outstanding corrosion resistance through composition design to accelerate reaction-induced CMAS consumption},
year = {2025},
journal = {Journal of Advanced Ceramics},
volume = {14},
number = {7},
pages = {9221106},
keywords = {environmental barrier coating (EBC), corrosion mechanism, Y4Al2O9 (YAM)/Y2O3, calcium–magnesium–alumino–silicate (CMAS)},
url = {https://www.sciopen.com/article/10.26599/JAC.2025.9221106},
doi = {10.26599/JAC.2025.9221106},
abstract = {The search for new materials with reliable molten calcium–magnesium–alumino–silicate (CMAS) resistance at elevated temperatures is important for the development of advanced aeroengines. In the present study, a novel Y4Al2O9 (YAM)/Y2O3 composite was designed and fabricated from dense samples via the hot-pressing method. The interactions and mechanisms between the Y4Al2O9/Y2O3 composite and CMAS at 1300 and 1500 °C for durations of 1, 4, 25, and 50 h were thoroughly explored. The results revealed that Y4Al2O9/Y2O3 exhibited substantial resistance to CMAS infiltration at both temperatures, without notable grain-boundary penetration by CMAS glass. More importantly, the incorporation of reaction-active components in the composite accelerated the consumption of molten CMAS constituents and reduced their corrosive activity, which is recognized as the crucial principle for the composition design of anti-CMAS materials. This work provides valuable insights that can guide the design of the composition and advancement of superior CMAS-resistant materials.}
}