Oxidation and ablation behavior of ZrB2-SiC sharp leading edge under hypersonic environment

摘要：

Sharp leading edge produced by ZrB2-20vol％SiC ultra high temperature ceramics (UHTCs) was ablated under ground simulated hypersonic conditions using an archeated wind tunnel with the stagnation pressure and Mach number of 1.2 atm and 2.7 M, respectively, and sharp leading edge C/SiC sample was also ablated under the same condition for comparison. ZrB2-SiC composite exhibited an excellent thermal-oxidative and configurational stability in the simulated hypersonic environment compared with C/SiC material. Microstructure of the oxide scale of ZrB2-SiC composite after ablation was also investigated. The oxidation and ablation mechanism was also discussed.

关键词： UHTC Oxidation/Ablation behavior Microstructure

作者: Xinghong Zhang Ping Hu Jiecai Han

作者单位: Center for Composite Materials and Structure, Harbin Institute of Technology,Harbin 150001, PR China

会议类型: 国际会议

会议名称: The 3rd Sino-Italian Conference on Space Aerothermodynamics and Hot Structures(第三届中意航天飞行器气动热力学与热结构研讨会)

会议地点: 上海

会议语种:英文

页码: 68-73

在线出版日期: 2011-11-21（万方平台首次上网日期，不代表论文的发表时间）