摘要
Abstract
In order to investigate the reaction characteristics of oxidizer-fuel composite materials with different particle sizes in constant-volume combustion,laser ignition and detonation environment of high energy explosive hexanitrohexaazaisowurtzitane(CL-20),three particle sizes of perfluoropolyether-functionalized micro/nano aluminum(nAl_150@x PFPE,μAl_1@x PFPE and μAl_5@x PFPE,where x=2.5%,5.0%,7.5%)was constructed by particle suspension method,and CL-20 based aluminized ex-plosive was prepared by kneading granulation method.The pressure-time curve,laser-induced ignition process,energy release rate and efficiency of samples in CL-20 were studied by means of closed constant-volume explosive device,laser ignition,deto-nation velocity and detonation heat test equipment,respectively.The results showed that with the increase of PFPE mass frac-tion,the peak pressure and pressurization rate of nAl_150@x PFPE samples and μAl_1@x PFPE samples increased gradually,while the peak pressure of μAl_1@7.5%PFPE sample reached 4138.4 kPa and its pressurization rate reached 0.216 MPa·ms-1.However,when the PFPE mass fraction exceeded 5.0%,the pressurization rate seemed to slow down.At the same time,with the increase of PFPE mass fraction,the burning rate of PFPE-functionalized micro/nano aluminum in CL-20 increased gradually.When x=7.5%,the burning rate of all the three samples with different particle sizes in CL-20 increased by 2.1 cm·s-1,1.8 cm·s-1 and 2.3 cm·s-1,respectively.In addition,four kinds of fuel-rich CL-20 based aluminized explosives were designed.Among them,the measured detonation velocity of JWL-3 explosive(62%CL-20/32%μAl_1@5.0%PFPE/6%binder)was 8125 m·s-1,the measured detonation heat was 8049.8 kJ·kg-1,and the energy release efficiency reached 86.10%(measured by detonation heat).关键词
六硝基六氮杂异伍兹烷(CL-20)/全氟聚醚(PFPE)功能化微/纳铝粉/定容燃烧/激光点火/爆轰环境Key words
hexanitrohexaazaisowurtzitane/perfluoropolyether-functionalized micro/nano aluminum/constant-volume combus-tion/laser ignition/detonation environment分类
武器工业
