南京航空航天大学学报（英文版）2024，Vol.41Issue(5)：645-655,11.DOI:10.16356/j.1005-1120.2024.05.009
用于高超声速飞行条件下航天发动机的HfC涂层2.5D针刺复合材料烧蚀过程研究
Ablation Processes for HfC-Coated 2.5D Needle-Punched Composites Used for Aerospace Engines Under Hypersonic Flight Conditions
摘要
Abstract
The working environment of aerospace engines is extremely harsh with temperature exceeding 1 700℃and accompanied by thermal coupling effects.In this condition,the materials employed in hypersonic aircraft undergo ablation issues,which can cause catastrophic accidents.Due to the excellent high-temperature stability and ablation resistance,HfC exhibits outstanding thermal expansion coefficient matching that of C/SiC composites.2.5D needle-punched C/SiC composites coated with HfC are prepared using a plasma spraying process,and a high-enthalpy arc-heated wind tunnel is employed to simulate the re-entry environment of aircraft at 8 Mach and an altitude of 32 km.The plasma-sprayed HfC-coated 2.5D needle-punched C/SiC composites are subjected to long-term dynamic testing,and their properties are investigated.Specifically,after the thermal assessment ablation experiment,the composite retains its overall structure and profile;the total mass ablation rate is 0.074 45 g/s,the average linear ablation rate in the thickness direction is-0.067 5 μm/s,and the average linear ablation rate in the length direction is 13.907 μm/s.Results verify that plasma-sprayed HfC coating exhibits excellent anti-oxidation and ablation resistance properties.Besides,the microstructure and ablation mechanism of the C/SiC composites are studied.It is believed that this work will offer guideline for the development of thermal protection materials and the assessment of structural thermal performance.关键词
2.5D针刺C/SiC复合材料/烧蚀机理/电弧加热风洞实验/高焓流Key words
2.5D needle-punched C/SiC composites/ablation mechanism/arc-heated wind tunnel experiment/high enthalpy flow分类
通用工业技术引用本文复制引用
张子怡,史振宇,倪敬,王继来,张成鹏..用于高超声速飞行条件下航天发动机的HfC涂层2.5D针刺复合材料烧蚀过程研究[J].南京航空航天大学学报（英文版）,2024,41(5):645-655,11.基金项目
This work was financially supported by the National Key R&D Program of China(No.2022YFB3-401900),the National Natural Science Foundation of China(No.U21A20134),and the Shandong Provincial Natural Science Foundation(Excellent Young Fund,No.ZR2022YQ48). （No.2022YFB3-401900）
