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 Y_(4)...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 Y_(4)Al_(2)O_(9)(YAM)/Y_(2)O_(3)composite was designed and fabricated from dense samples via the hot-pressing method.The interactions and mechanisms between the Y_(4)Al_(2)O_(9)/Y_(2)O_(3)composite and CMAS at 1300 and 1500℃for durations of 1,4,25,and 50 h were thoroughly explored.The results revealed that Y_(4)Al_(2)O_(9)/Y_(2)O_(3)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.展开更多
基金supported by the National Key R&D Program of China(No.2024YFB3714503)the National Natural Science Foundation of China(Nos.52130204 and U21A2063)+1 种基金the LiaoNing Revitalization Talents Program(No.XLYC2203090)the International Partnership Program of the Chinese Academy of Sciences(No.172GJHZ2022094FN).
文摘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 Y_(4)Al_(2)O_(9)(YAM)/Y_(2)O_(3)composite was designed and fabricated from dense samples via the hot-pressing method.The interactions and mechanisms between the Y_(4)Al_(2)O_(9)/Y_(2)O_(3)composite and CMAS at 1300 and 1500℃for durations of 1,4,25,and 50 h were thoroughly explored.The results revealed that Y_(4)Al_(2)O_(9)/Y_(2)O_(3)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.
