Effect of Aging on the Performances of TNT Based Melt-cast Explosives

Chinese Journal of Explosives and Propellants Pub Date : 2016-06-25 DOI:10.14077/j.issn.1007-7812.2016.03.009

Niu Guo-tao, Hao Jing, Jin Da-yong, Zhang Dong-mei, N. Lei, Cao Shao-ting

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Abstract

To research the effect of aging on the explosive performances,the accelerated aging test of three kinds of melt-cast explosives TNT/RDX,TNT/RDX/Al and TNT/HMX/Al stockpiled for a period of time were carried out.The micro morphology and safety properties of these explosives before and after aging were studied by scanning electron microscopy and vacuum stability test(VST).The mechanical sensitivities and detonation velocities of these explosives before and after aging were tested.The results show that after aging,the color of explosives becomes dark,the volume is expanded,and the mass is decreased.The amount of evolved gas of samples is less than 2mL/g.The thermal sensitivity of samples also has smaller change.The change in mechanical sensitivity is related to the components and aging mode of explosive.For the TNT/RDX,the detonation velocity gradually decreases with increasing the storage time,which is consistent with that of overall accelerated aging.The change trend of heat of detonation with increasing the storage time for the TNT/RDX/Al and TNT/HMX/Al is opposite,revealing that the aging mechanism may be different.

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老化对TNT熔铸炸药性能的影响

为研究时效对炸药性能的影响，对TNT/RDX、TNT/RDX/Al和TNT/HMX/Al三种熔铸炸药进行了贮存一段时间的加速时效试验。采用扫描电镜和真空稳定性试验(VST)研究了这些炸药老化前后的微观形貌和安全性能。对这些炸药老化前后的机械灵敏度和爆速进行了测试。结果表明:炸药老化后颜色变深，体积膨胀，质量减小;样品的出气量小于2mL/g。样品的热敏度变化也较小。机械灵敏度的变化与炸药的成分和老化方式有关。对于TNT/RDX，随着存放时间的增加，爆速逐渐降低，这与整体加速老化的规律一致。TNT/RDX/Al和TNT/HMX/Al的爆轰热随存放时间的增加变化趋势相反，说明两者的老化机理可能不同。

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Chinese Journal of Explosives and Propellants

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