C/SiC-ZrB<sub>2</sub>-TiB<sub>2</sub>复合材料的双相流烧蚀性能及抗烧蚀机制

doi:10.19976/j.cnki.43-1448/TF.2023055

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Abstract The C/SiC-ZrB₂-TiB₂ composites were prepared by reactive melt infiltration process. The ablation properties of the composites were tested under a single plasma heat flow and a biphasic flow ablation environment in which the heat flow was coupled with the particle flow, respectively, and the ablation resistance mechanism of the composites was investigated. The results show that the C/SiC-ZrB₂-TiB₂ composites exhibit excellent ablation resistance in both thermal environments. The linear ablative rates of the composites are 0.38 μm/s and 19.80 μm/s under the action of single heat flow at ablation temperatures of 1 920 ℃ and 2 230 ℃, respectively, and a stable oxide layer consisting of Zr_xTi_1-_xO₂ skeleton and liquid filled phase is formed on the surface, which can slow down the ablation. The linear ablative rates of the composites under biphasic flow are 2.93 μm/s and 21.91 μm/s at ablation temperatures of 2 020 ℃ and 2 190 ℃, respectively. SiC-ZrB₂-TiB₂ ceramic matrix and its oxide layer can maintain sufficient strength at higher temperatures to resist particle exfoliation, and the carbon fibre ablation level is low, which can provide a better reinforcement and toughening effect.

Key words： plasma heat flow particle flow ablation property stable oxide layer exfoliation

Received: 24 May 2023 Published: 23 January 2024

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	ZHANG Jiancheng
	ZENG Yi
	HU Jinrun
	LI Tianyou
	WANG Jiajun

Cite this article:

ZHANG Jiancheng,ZENG Yi,HU Jinrun, et al. Biphasic flow ablation properties and ablation resistance mechanisms of C/SiC-ZrB₂-TiB₂ composites[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(6): 565-579.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2023055 OR http://pmbjb.csu.edu.cn/EN/Y2023/V28/I6/565

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