Ablation Processes for HfC-Coated 2.5D Needle-Punched Composites Used for Aerospace Engines Under Hypersonic Flight Conditions

作     者：ZHANG Ziyi SHI Zhenyu NI Jing WANG Jilai ZHANG Chengpeng ZHANG Ziyi;SHI Zhenyu;NI Jing;WANG Jilai;ZHANG Chengpeng

作者机构：Key Laboratory of High Efficiency and Clean Mechanical Manufacture(Ministry of Education)Shandong UniversityJinan 250061P.R.China School of Mechanical EngineeringShandong UniversityJinan 250061P.R.China State Key Laboratory of Reliability and Intelligence of Electrical EquipmentSchool of Mechanical EngineeringHebei University of TechnologyTianjin 300130P.R.China School of Mechanical EngineeringHangzhou Dianzi UniversityHangzhou 310012P.R.China 

出 版 物：《Transactions of Nanjing University of Aeronautics and Astronautics》 (南京航空航天大学学报（英文版）)

年 卷 期：2024年第41卷第5期

页      面：645-655页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Key R&D Program of China(No.2022YFB3-401900) the National Natural Science Foundation of China(No.U21A20134) the Shandong Provincial Natural Science Foundation(Excellent Young Fund,No.ZR2022YQ48) 

主　　题：2.5D needle-punched C/SiC composites ablation mechanism arc-heated wind tunnel experiment high enthalpy flow 

摘      要：The working environment of aerospace engines is extremely harsh with temperature exceeding 1700℃and accompanied by thermal coupling *** this condition,the materials employed in hypersonic aircraft undergo ablation issues,which can cause catastrophic *** 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 *** plasma-sprayed HfC-coated 2.5D needle-punched C/SiC composites are subjected to long-term dynamic testing,and their properties are ***,after the thermal assessment ablation experiment,the composite retains its overall structure and profile;the total mass ablation rate is 0.07445 g/s,the average linear ablation rate in the thickness direction is-0.0675μm/s,and the average linear ablation rate in the length direction is 13.907μm/*** verify that plasma-sprayed HfC coating exhibits excellent anti-oxidation and ablation resistance ***,the microstructure and ablation mechanism of the C/SiC composites are *** is believed that this work will offer guideline for the development of thermal protection materials and the assessment of structural thermal performance.