C/SiC-ZrB2-TiB2复合材料的双相流烧蚀性能及抗烧蚀机制

章俭诚; 曾毅; 胡锦润; 李天佑; 王佳骏

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

粉末冶金材料科学与工程 >

2023 , Vol. 28 >Issue 6: 565 - 579

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

工艺技术

C/SiC-ZrB₂-TiB₂复合材料的双相流烧蚀性能及抗烧蚀机制

章俭诚 ,
曾毅 ,
胡锦润 ,
李天佑 ,
王佳骏

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中南大学粉末冶金研究院,长沙 430081

收稿日期: 2023-05-24

修回日期: 2023-10-08

网络出版日期: 2024-01-23

基金资助

国家自然科学基金资助项目(51602349)

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Biphasic flow ablation properties and ablation resistance mechanisms of C/SiC-ZrB₂-TiB₂ composites

ZHANG Jiancheng ,
ZENG Yi ,
HU Jinrun ,
LI Tianyou ,
WANG Jiajun

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Powder Metallurgy Research Institute, Central South University, Changsha 430081, China

Received date: 2023-05-24

Revised date: 2023-10-08

Online published: 2024-01-23

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摘要

采用反应熔渗工艺制备C/SiC-ZrB₂-TiB₂复合材料,分别在单一等离子热流以及热流和粒子流相耦合的双相流烧蚀环境下,测试复合材料烧蚀性能,研究其抗烧蚀机制。结果表明：C/SiC-ZrB₂-TiB₂复合材料在两种热环境下均表现出优异的抗烧蚀性能。烧蚀温度为1 920 ℃和2 230 ℃时,复合材料在单一热流作用下的线烧蚀率分别为0.38 μm/s和19.80 μm/s,表面形成由Zr_xTi_1-_xO₂骨架和液态填充相组成的稳定氧化层,起到减缓烧蚀的作用。烧蚀温度为2 020 ℃和2 190 ℃时,复合材料在双相流作用下的线烧蚀率分别为2.93 μm/s和21.91 μm/s,SiC-ZrB₂-TiB₂陶瓷基体及其氧化层能在较高的温度下保持足够的强度,抵御粒子剥蚀,且碳纤维烧蚀程度较低,能起到较好的增强增韧效果。

关键词： 等离子热流; 粒子流; 烧蚀性能; 稳定氧化层; 剥蚀

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章俭诚 , 曾毅 , 胡锦润 , 李天佑 , 王佳骏 . C/SiC-ZrB₂-TiB₂复合材料的双相流烧蚀性能及抗烧蚀机制[J]. 粉末冶金材料科学与工程, 2023 , 28(6) : 565 -579 . DOI: 10.19976/j.cnki.43-1448/TF.2023055

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

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