Design and preparation of multilayer TaC/HfC coating: Ablation behavior under oxyacetylene flame with different heat flux. (1st August 2022)

• Record Type: Journal Article
• Authors: Zhang, Jian; Zhang, Yulei; Zhu, Xiaofei; Fu, Yanqin; Chen, Ruicong; Gai, Wenhan
• Is Part Of: Corrosion science. Volume 204(2022)
• Publication Date: 2022-08-01
• Subjects: C/C composites -- Multilayer -- HfC and TaC coating -- Ablation resistances -- Different heat flux; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110385
• Languages: English
• ISSNs: 0010-938X

Abstract

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/m 2, the formation of dense Hf-Ta-O solid solution phase tightly adhered on substrate. As heat flux increased to 4.2 MW/m 2, 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. Highlights: 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.