In order to explore the thermal decomposition and combustion performances of zirconium powder(Zr)with high-energy oxidant composite,the thermal decomposition behavior,combustion heat and ignition combustion process of four kinds of energetic materials(EMs)of AP,CL-20,HMX,DAP-4 and Zr/EMs samples were compared and analyzed by using differen-tial scanning calorimetry,automatic calorimetry and self-built combustion experimental system.Some combustion products were collected and characterized.The combustion mechanism of Zr/DAP-4 was analyzed.Results show that the thermal stabil-ity and combustion heat release of DAP-4 are better than that of the other three EMs samples.The addition of Zr leads to a higher combustion heat and a lower Ea value of the sample,the thermal decomposition temperature remains at 373.8 ℃,and the combustion performance is better than that of pure DAP-4.Compared with the thermal decomposition of Zr/CL-20 and Zr/HMX,Zr/DAP-4 has a higher initial decomposition temperature and peak temperature,a lower apparent activation energy Ea(138.7kJ/mol),and a higher combustion heat(17 134J/g).The entire combustion time of Zr/DAP-4 composite is only 170ms,indicating a rapid and intense combustion reaction and its flame intensity is also superior to the other three samples.The combustion products of Zr/DAP-4 include solid products such as ZrO2 and gas products such as H2O and HCl.Zr/DAP-4 composite energetic material has higher energy characteristics and better combustion performances,which make it has great potential for application in the formulation design of propellants.
关键词
物理化学/DAP-4/锆粉/热分解/燃烧性能/释能/高能氧化剂
Key words
physical chemistry/DAP-4/Zr powder/thermal decomposition/combustion performance/energy release/high energy oxidizer
维普
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