固体火箭技术2025，Vol.48Issue(1)：62-67,6.DOI:10.7673/j.issn.1006-2793.2025.01.007
Al-2.5Li合金对高燃速丁羟推进剂燃烧性能的影响
Influence of Al-2.5Li alloy on combustion characteristics of high burning rate HTPB propellant
摘要
Abstract
The microstructure,thermal decomposition properties and combustion characteristics of Al-2.5Li alloy(the mass frac-tion of Li is 2.3%)were characterized by SEM,ICP,DTA and high-speed camera.The effect of Al-2.5Li alloy on the mechanical properties,burning rate and pressure exponent of high burning rate hydroxyl-terminated polybutadiene(HTPB)propellant was inves-tigated by means of electronic universal testing machine and underwater acoustic emission combustion rate tester.The results show that highly active Al-2.5Li alloy can be observed obvious micro-explosion phenomenon in combustion process.Replacing 50%Al powder in the formulation with Al-2.5Li alloy,the tensile strength of high burning rate HTPB propellant at room and low temperature are decreased by 8.7%and 2.1%respectively,the elongation,burning rate and pressure exponent at 1～24 MPa keep basically no change.Replacing all Al powder in the formulation with Al-2.5Li alloy,the tensile strength of high burning rate HTPB propellant at room and low temperature are decreased by 18.4%and 6.6%respectively,the elongation keeps basically no change,the burning rate is increased by 16.5%at 9 MPa,the pressure exponent increases from 0.368 to 0.407 at 1～9 MPa and decreases from 0.478 to 0.313 at 9～24 MPa.关键词
Al-2.5Li合金/丁羟推进剂/力学性能/燃速/压强指数Key words
Al-2.5Li alloy/HTPB propellant/mechanical property/burning rate/pressure exponent分类
航空航天引用本文复制引用
周鹏,刘云杰,陈德洋,牟国柱,孟嘉鑫,张晨,张天福..Al-2.5Li合金对高燃速丁羟推进剂燃烧性能的影响[J].固体火箭技术,2025,48(1):62-67,6.基金项目
国家自然科学基金项目(NSFC21905084). （NSFC21905084）
