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shock-induced chemical reaction characteristics of PTFE-Al-Bi_(2)O_(3)reactive materials

Defence Technology（防务技术） 2024年第6期36卷 1-12页

作者： Chunlan Jiang Rong Hu Jingbo Zhang Zaicheng Wang Liang Mao State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

A ternary system of PTFE/Al/Bi_(2)O_(3)is constructed by incorporating PTFE-based reactive material and thermite for enhancing the energy release of the PTFE-based reactive *** effects of Bi_(2)O_(3)in the PTFE/Al/Bi_(2)O_(3)on both mechanical properties and the energy release were investigated through various tests such as thermogravimetry-differential scanning calorimetry,adiabatic oxygen bomb test and split Hopkinson pressure bar *** microstructure observed through scanning electron microscope and Xray diffraction results are used to analyze the ignition and reaction mechanism of PTFE/Al/Bi_(2)O_(3).The results indicate that the PTFE/Al/Bi_(2)O_(3)are capable of triggering the exothermic reaction of molten PTFE/Bi_(2)O_(3)and Al/Bi_(2)O_(3)over the PTFE/Al reactive materials,thereby promoting *** excessive aluminum in the ternary system is beneficial for increasing energy *** ignition of shock-induced chemical reactions in PTFE/Al/Bi_(2)O_(3)is closely related to the material *** dominant mechanism for hot-spot generation under Split Hopkinson Pressure Bar test is the frictional temperature rise at the microcrack after failure.

关键词： PTFE/Al/Bi_(2)O_(3) shock-induced chemical reaction Energy release

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Study on energy release characteristics of reactive material casings under explosive loading

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Defence Technology（防务技术） 2021年第5期17卷 1791-1803页

作者： Ning Du Wei Xiong Tao Wang Xian-feng Zhang Hai-hua Chen Meng-ting Tan School of Mechanical Engineering Nanjing University of Science&TechnologyNanjingXiaolingwei 200Jiangsu210094China School of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjingYudaojie 29Jiangsu211106China

Reactive Materials(RMs),a new material with structural and energy release characteristics under shockinduced chemical reactions,are promising in extensive applications in national defense and military *** can increase the lethality of warheads due to their dual *** paper focuses on the energy release characteristics of RM casings prepared by alloy melting and casting process under explosive *** experiments of RM and conventional 2A12 aluminum alloy casings were conducted in free field to capture the explosive fireballs,temperature distribution,peak overpressure of the air shock wave and the fracture morphology of fragments of reactive material(RM)warhead casings by using high-speed camera,infrared thermal imager temperature and peak overpressure testing and scanning electron *** showed that an increase of both the fireball temperature and air shock wave were observed in all RM casings compared to conventional 2A12 aluminum ally *** RM casings can improve the peak overpressure of the air shock wave under explosion loading,though the results are different with different charge *** to the energy release characteristics of the RM,increasing the thickness of RM casings will increase the peak overpressure of the near-field air shock wave,while reducing the thickness will increase the peak overpressure of the far-field air shock wave.

关键词： Reactive materials Explosive loading shock-induced chemical reaction Energy release characteristics Fragmentation

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