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Construct a 3D microsphere of hmx/b/al/ptfe to obtain the high energy and combustion reactivity

Defence Technology（防务技术） 2024年第2期32卷 45-54页

作者： Jian Wang Jie Chen Yaofeng Mao Yongjun Deng Wei Cao Fude Nie Jun Wang Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621999PR China Shock and Vibration of Engineering Materials and Structures Key Lab of Sichuan Province Mianyang 621010PR China

Metal(aluminum and boron)based energetic materials have been wildly applied in various fields including aerospace,explosives and micro-devices due to their high energy ***,the low combustion efficiency and reactivity of metal fuels,especially boron(b),severely limit their practical ***,multi-component 3D microspheres of hmx/b/al/ptfe(HbA)have been designed and successfully prepared by emulsion and solvent evaporation method to achieve superior energy and combustion *** reactivity and energy output of HbA are systematically measured by ignitionburning test,constant-volume explosion vessel system and bomb *** to the increased interfacial contact and reaction area,HbA shows higher flame propagation rate,faster pressurization rate and larger combustion heat of 29.95 cm/s,1077 kPa/s,and 6164.43 J/g,which is 1.5 times,3.5 times,and 1.03 times of the physical mixed counterpart(HbA-P).Meanwhile,HbA also shows enhanced energy output and reactivity than 3D microspheres of hmx/b/ptfe(Hb)resulting from the high reactivity of *** reaction mechanism of 3D microspheres is comprehensively investigated through combustion emission spectral and thermal analysis(TG-DSC-MS).The superior reactivity and energy of HbA originate from the surface etching of fluorine to the inert shell(al_(2)O_(3) and b_(2)O_(3))and the initiation effect of al to *** work offers a promising approach to design and prepare high-performance energetic materials for the practical applications.

关键词： hmx/b/al/ptfe 3D microspheres Surface etching Reaction mechanism

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