Tailoring ablation resistance of(Hf,Zr,Ta)C coatings above 2000℃:Critical role of Ta contentOA
Multicomponent(Hf,Zr,Ta)C ceramics are promising candidates for ablation-resistant coating materials applied in ultrahightemperature environments.However,the influence of compositional variations on their ablation behavior remains insufficiently understood.In this study,the effect of Ta content on the ablation resistance of(Hf,Zr,Ta)C coatings was systematically investigated.Moderate Ta addition promotes the densification of oxide scales,whereas excessive Ta reduces the thermochemical stability of the oxide scale,leading to increased ablation damage.The optimized composition,the T15 coating,exhibits superior ablation resistance,maintaining structural integrity for 300 s under an~2160℃oxyacetylene flame.This enhancement is attributed to the co-formation of the(Hf,Zr,Ta)O_(2)and(Hf,Zr)_(6)Ta_(2)O_(17)phases.Ta5+partially dissolves into(Hf,Zr)O_(2)(~5 at%),reducing the oxygen vacancy concentration and improving the oxidation resistance.Additionally,the Ta-rich liquid phase generated from the decomposition of(Hf,Zr)_(6)Ta_(2)O_(17)enhances oxide scale densification and contributes to structural stability during cooling through peritectic transformation.These results demonstrate that non-equimolar multicomponent carbides offer a feasible strategy for improving the ablation resistance of ultrahigh-temperature coatings.
Jianhua Zhang;Yanqin Fu;Junshuai Lv;Junhao Zhao;Sen Yang;Pei Wang;Jie Xu;Tao Li;Yulei Zhang
Henan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,China Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education,Harbin Institute of Technology,Harbin 150001,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,ChinaShaanxi Key Laboratory of Fiber Reinforced Light-Weight Composites,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,ChinaShaanxi Key Laboratory of Fiber Reinforced Light-Weight Composites,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,ChinaKey Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education,Harbin Institute of Technology,Harbin 150001,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,ChinaHenan Key Laboratory of High Performance Carbon Fiber Reinforced Composites,Institute of Carbon Matrix Composites,Henan Academy of Sciences,Zhengzhou 450046,China Shaanxi Key Laboratory of Fiber Reinforced Light-Weight Composites,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China
通用工业技术
carbon/carbon compositesmulticomponent(Hf,Zr,Ta)C solid solution ceramicscoatingablation resistanceoxide scale
《Journal of Advanced Ceramics》 2026 (1)
P.117-129,13
supported by the National Key R&D Program of China(No.2021YFA0715803)the National Natural Science Foundation of China(Nos.52293373,52302091,and 52130205)the Joint Fund of Henan Province Science and Technology R&D Program(Nos.225200810002 and 235200810030)the Fundamental Research Funds of Henan Academy of Sciences(No.240621061).
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