High temperature interaction of Y4Al2O9/Y2O3 under CMAS exposure: Mechanism of outstanding corrosion resistance through composition design to accelerate reaction-induced CMAS consumption
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...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Tsinghua University Press
2025-07-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2025.9221106 |
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| Summary: | 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. |
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| ISSN: | 2226-4108 2227-8508 |