Relationshipbetweenmicrostructuresofnano-TATB andshockinitiationthresholdsofitscomposites
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摘要: 采用电爆炸箔驱动飞片加载方式,测试了纳米TATB与某敏感炸药复合体系的50%冲击起爆电 压阈值,讨论了TATB微观结构参数与复合物冲击起爆阈值之间关系的几种观点。采用造型粉数学建模-表 面形貌表征-冲击起爆阈值实验验证的方法,探讨了复合体系的起爆机制。结果表明:复合体系中各组分的分 布方式与纳米网格TATB聚集体尺寸大小密切相关,决定了复合物中敏感炸药所受短脉冲作用的压力大小 和时间长短,这可能是导致50%起爆阈值变化的关键因素。Abstract: Theshockinitiationthresholdundertheconditionof50%initiationprobabilitywasmeasuredforthecomposites, whichwerecomposedofnano-TATBandonesensitiveexplosive,underthe impactofathinplasticflayerplateacceleratedbyelectricallyexplodingfoils.Severalviewpointswere discussedontherelationshipbetweenthemicrostructuralparametersofnano-TATBandtheshockinitiationthresholdofitscomposites. Numericalmodelingofgranulatingprocesses,topographycharacterizationofmoldingpowdersurfacesandshockinitiationthresholdtestswerecarriedouttoexplore thedetonationprocessofthecompositeexplosive.Researchedresultsindicatethatthedistributionof sensitiveexplosiveparticlesonthesurfaceofcompositesmoldingpowderandthesizeofnano-gridding- TATBconglomerationmaybethemostimportantfactorofdeterminingtheshort-pulsepress andtimeactingonthesensitiveexplosiveparticles.
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