1. Design and preparation of multilayer TaC/HfC coating: Ablation behavior under oxyacetylene flame with different heat flux.
- Author
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Zhang, Jian, Zhang, Yulei, Zhu, Xiaofei, Fu, Yanqin, Chen, Ruicong, and Gai, Wenhan
- Subjects
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HEAT flux , *SURFACE coatings , *MULTILAYERED thin films , *SOLID solutions , *FLAME - Abstract
The design of a new multilayer anti-ablation coating is inseparable from the performance assessment in multiple environments. This work investigates the effects of different ablation flux on the microstructure evolution and phase composition of multilayer TaC/HfC coating. The results show that the different temperature regions were generated on ablated coating surface, resulting in the formation of different oxidation products. At heat flux of 2.4 MW/m2, the formation of dense Hf-Ta-O solid solution phase tightly adhered on substrate. As heat flux increased to 4.2 MW/m2, a large amount of molten oxidation phase was produced in the central area, which caused secondary damage to the coating under the action of high-speed flame. • Different temperature regions were formed on the coating surface under different heat flux. • The generation of a large amount of molten oxide phase caused secondary damage to the coating. • The ablation process of the TaC/HfC multi-layer coating can be divided into two stages. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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