Functionally Graded Oxide Scale on (Hf,Zr,Ti)B2 Coating with Exceptional Ablation Resistance Induced by Unique Ti Dissolving
Abstract Multicomponent Ti‐containing ultra‐high temperature ceramics (UHTCs) have emerged as more promising ablation‐resistant materials than typical UHTCs for applications above 2000 °C. However, the underlying mechanism of Ti improving the ablation performance is still obscure. Here, (Hf,Zr,Ti)B2...
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Wiley
2025-03-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202411292 |
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| author | Junshuai Lv Wei Li Yanqin Fu Menglin Zhang Lingxiang Guo Fanyu Lu Jiachen Li Tao Li Yulei Zhang Hejun Li |
| author_facet | Junshuai Lv Wei Li Yanqin Fu Menglin Zhang Lingxiang Guo Fanyu Lu Jiachen Li Tao Li Yulei Zhang Hejun Li |
| author_sort | Junshuai Lv |
| collection | DOAJ |
| description | Abstract Multicomponent Ti‐containing ultra‐high temperature ceramics (UHTCs) have emerged as more promising ablation‐resistant materials than typical UHTCs for applications above 2000 °C. However, the underlying mechanism of Ti improving the ablation performance is still obscure. Here, (Hf,Zr,Ti)B2 coatings are fabricated by supersonic atmospheric plasma spraying, and the effects of Ti content on the ablation performance under an oxyacetylene flame are investigated. The (Hf0.45Zr0.45Ti0.10)B2 coating shows superior ablation resistance and cycling reliability at ≈2200°C. A functionally graded oxide scale comprising an outer dense layer and an underlying fine granular layer formed. The former is a better oxygen barrier owing to fewer cracks and the latter has high strain tolerance due to finer grain size. The uniform dissolving of ≈4 mol% Ti in the inner layer results in grain refinement via sluggish diffusion and thus stress release. For the outer layer, Ti segregation at the nanoscale leads to a metastable cubic (Hf,Zr,Ti)O2 and local severe lattice distortion, inhibiting the propagation of cracks. Ti ions’ unique dissolving in the oxide scale enables a strong oxygen diffusion barrier with high strain tolerance, which is responsible for superior performance. This study provides new insights into the ablation behavior of Ti‐containing multicomponent UHTCs. |
| format | Article |
| id | doaj-art-d5b4cb52a64f437dbae56183c45f1a32 |
| institution | OA Journals |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Wiley |
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| series | Advanced Science |
| spelling | doaj-art-d5b4cb52a64f437dbae56183c45f1a322025-08-20T02:35:40ZengWileyAdvanced Science2198-38442025-03-011210n/an/a10.1002/advs.202411292Functionally Graded Oxide Scale on (Hf,Zr,Ti)B2 Coating with Exceptional Ablation Resistance Induced by Unique Ti DissolvingJunshuai Lv0Wei Li1Yanqin Fu2Menglin Zhang3Lingxiang Guo4Fanyu Lu5Jiachen Li6Tao Li7Yulei Zhang8Hejun Li9Shaanxi 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 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 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 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 ChinaAbstract Multicomponent Ti‐containing ultra‐high temperature ceramics (UHTCs) have emerged as more promising ablation‐resistant materials than typical UHTCs for applications above 2000 °C. However, the underlying mechanism of Ti improving the ablation performance is still obscure. Here, (Hf,Zr,Ti)B2 coatings are fabricated by supersonic atmospheric plasma spraying, and the effects of Ti content on the ablation performance under an oxyacetylene flame are investigated. The (Hf0.45Zr0.45Ti0.10)B2 coating shows superior ablation resistance and cycling reliability at ≈2200°C. A functionally graded oxide scale comprising an outer dense layer and an underlying fine granular layer formed. The former is a better oxygen barrier owing to fewer cracks and the latter has high strain tolerance due to finer grain size. The uniform dissolving of ≈4 mol% Ti in the inner layer results in grain refinement via sluggish diffusion and thus stress release. For the outer layer, Ti segregation at the nanoscale leads to a metastable cubic (Hf,Zr,Ti)O2 and local severe lattice distortion, inhibiting the propagation of cracks. Ti ions’ unique dissolving in the oxide scale enables a strong oxygen diffusion barrier with high strain tolerance, which is responsible for superior performance. This study provides new insights into the ablation behavior of Ti‐containing multicomponent UHTCs.https://doi.org/10.1002/advs.202411292ablation‐resistant materialsmulticomponent solid solutionsoxide scaleultra‐high temperature ceramics |
| spellingShingle | Junshuai Lv Wei Li Yanqin Fu Menglin Zhang Lingxiang Guo Fanyu Lu Jiachen Li Tao Li Yulei Zhang Hejun Li Functionally Graded Oxide Scale on (Hf,Zr,Ti)B2 Coating with Exceptional Ablation Resistance Induced by Unique Ti Dissolving Advanced Science ablation‐resistant materials multicomponent solid solutions oxide scale ultra‐high temperature ceramics |
| title | Functionally Graded Oxide Scale on (Hf,Zr,Ti)B2 Coating with Exceptional Ablation Resistance Induced by Unique Ti Dissolving |
| title_full | Functionally Graded Oxide Scale on (Hf,Zr,Ti)B2 Coating with Exceptional Ablation Resistance Induced by Unique Ti Dissolving |
| title_fullStr | Functionally Graded Oxide Scale on (Hf,Zr,Ti)B2 Coating with Exceptional Ablation Resistance Induced by Unique Ti Dissolving |
| title_full_unstemmed | Functionally Graded Oxide Scale on (Hf,Zr,Ti)B2 Coating with Exceptional Ablation Resistance Induced by Unique Ti Dissolving |
| title_short | Functionally Graded Oxide Scale on (Hf,Zr,Ti)B2 Coating with Exceptional Ablation Resistance Induced by Unique Ti Dissolving |
| title_sort | functionally graded oxide scale on hf zr ti b2 coating with exceptional ablation resistance induced by unique ti dissolving |
| topic | ablation‐resistant materials multicomponent solid solutions oxide scale ultra‐high temperature ceramics |
| url | https://doi.org/10.1002/advs.202411292 |
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