首页|Shock-induced chemical reaction characteristics of PTFE-Al-Bi2O3 reactive materials
Shock-induced chemical reaction characteristics of PTFE-Al-Bi2O3 reactive materials
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A ternary system of PTFE/Al/Bi2O3 is constructed by incorporating PTFE-based reactive material and thermite for enhancing the energy release of the PTFE-based reactive material.The effects of Bi2O3 in the PTFE/Al/Bi2O3 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 test.The microstructure observed through scanning electron microscope and X-ray diffraction results are used to analyze the ignition and reaction mechanism of PTFE/Al/Bi2O3.The results indicate that the PTFE/Al/Bi2O3 are capable of triggering the exothermic reaction of molten PTFE/Bi2O3 and Al/Bi2O3 over the PTFE/Al reactive materials,thereby promoting reactions.The excessive aluminum in the ternary system is beneficial for increasing energy release.The ignition of shock-induced chemical reactions in PTFE/Al/Bi2O3 is closely related to the material fracture.The dominant mechanism for hot-spot generation under Split Hopkinson Pressure Bar test is the frictional temperature rise at the microcrack after failure.
PTFE/Al/Bi2O3Shock-induced chemical reactionEnergy release
Chunlan Jiang、Rong Hu、Jingbo Zhang、Zaicheng Wang、Liang Mao
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State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China
National Natural Science Foundation of ChinaState Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology
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