纳米Al对RDX基炸药机械感度和火焰感度的影响

采用机械混合法制备了含纳米Al的RDX基混合炸药,测试了其机械感度和火焰感度,用扫描电镜表征了纳米Al及其炸药的表面形貌,分析了感度变化的原因。结果表明,加入纳米Al后,RDX基炸药的撞击感度、摩擦感度和火焰感度增大;随着纳米Al含量的增加,撞击感度、摩擦感度和火焰感度明显增大;且含纳米Al炸药的撞击感度、摩擦感度和火焰感度均高于含微米Al炸药。纳米Al及含纳米Al炸药均存在微量团聚现象,在一定程度上影响了含纳米Al的RDX基炸药的感度。

Influence of Nano Al on Mechanical Sensitivity and Flame Sensitivity of RDX-based Explosive

The RDX-based composite explosive with nano Al were prepared by the mixed mechanically method.The mechanical sensitivity and flame sensitivity of composite explosive were measured.The morphologies of nano Al and explosives were characterized and the cause of the sensitivity changes was analyzed.Results showed that adding nano Al to RDX-based explosives made the impact sensitivity,friction sensitivity and flame sensitivity of explosives increase.With increasing the content of nano Al,the impact sensitivity of explosive showed a increased tendency,and both friction sensitivity and flame sensitivity had also remarkably increased.The impact sensitivity,friction sensitivity and flame sensitivity of composite explosive containing nano Al were higher than explosive containing micron Al,Both nano Al and nano Al explosives had a small amount of aggregation,this phenomena influenced the sensitivity of nano Al explosives to some extent.