| In order to explore the application of Mg(BHx)_y in nitrate ester explosives and to improve the energy characteristics of nitrate ester explosive,Mg(BHx)_y was added to nitrate ester explosive.Throgh oxygen bomb calorimeter test,underwater explosion test,high speed photography experiment,scanning electron microscope experiment,characteristic fall height test,thermogravimetric and differential scanning calorimetric experiment(TG-DSC)and adiabatic accelerating rate calorimetry experiment(ARC),the energy characteristics,after burning effects,explosive detonation theory,dispersion properties,mechanical impact sensitivity,thermal decomposition performance and thermal hazard of six kinds nitrate ester explosive were studied.In the detonation process,the nitrate matrix detonated firstly,and released large amounts of energy,Mg(BHx)_y decomposed,and the heat release significantly improved the energy characteristics of explosives.In oxygen bomb calorimeter test,the Mg(BHx)_y could not completely react,and the energy increase was less than the theoretical calculation.But in the underwater explosion,the total energy of nitrate ester explosive with Mg(BHx)_y was increased by 17.56%than the same system explosive with Al.And in the after burning effect experiment,the tatal energy of nitrate ester explosive with Mg(BHx)_y was increased by 100%.In TG-DSC test,Mg(BHx)_y could make the heat release peak move rearward.Due to explosive had negative oxygen balance and explosive was not completed combustion,the heat release was decreased,and the weight loss rate increased.When the temperatxxre reached 500°C,Mg(BHx)_y did not decompose,the temperature reached 900 ?,Mg(BHx)_y could not burn without oxygen.In ARC experiment,Mg(BHx)_y could improve the initial decomposition temperature of the nitrate matrix,increased the apparent activation energy,and increase the thermal decomposition rate of nitrate ester explosive. |
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