Performance Optimization of Core-Shell HMX@(Al@GAP) Aluminized Explosives
Performance Optimization of Core-Shell HMX@(Al@GAP) Aluminized Explosives
复制标题
核壳HMX@(Al@GAP)含铝炸药性能优化
DOI：
10.1016/j.cej.2020.126360
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发表时间：
--
影响因子：
15.1
通讯作者：
Yushi Wen
中科院分区：
文献类型：
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作者：
Chengcheng Zeng;Zhijian Yang;Yushi Wen
铝粉的聚集阻碍了含铝炸药的能量释放，尤其是纳米铝粉。制备了铝含量为 5 wt% 至 15 wt% 的核壳 HMX@(Al@GAP) 炸药，并系统研究了其形貌、力学性能、热分解、燃烧和爆轰性能。与物理混合物相比，具有核壳结构的含铝炸药表现出更好的抗蠕变性能和机械强度。由于Al@GAP颗粒良好的分散性，核壳HMX@(Al@GAP)中HMX的热分解稍微提前。核壳炸药在燃烧过程中出现了延迟但更剧烈和更长的燃烧。 HMX@15wt%(Al@GAP)含铝炸药的爆速和比动能分别为8567m/s和1.412kJ/g，分别比相应的物理混合物高1.3%和5.1%。通过ReacFF-/g力场计算了核壳HMX@(Al@GAP)和物理混合物的反应，显示出平均温度对微观结构的显着依赖性。目前的研究可能为协同改善含铝炸药的机械和爆炸性能提供新的见解。
The energy release of aluminized explosives was impeded by the aggregation of aluminum powders, especially for nano-aluminum powders. The core-shell HMX@(Al@GAP) explosives with 5 wt% to 15 wt% aluminum were fabricated, with systematical investigation of morphology, mechanical properties, thermal decomposition, combustion and detonation properties. Compared with the physical mixtures, the aluminized explosives with core-shell microstructure showed better creep resistance and mechanical strength. The thermal decomposition of HMX in core-shell HMX@(Al@GAP) was slightly advanced due to good dispersion of Al@GAP particles. Delayed but more vigorous and longer burning during combustion process was witnessed for the core-shell explosive. For HMX@15 wt%(Al@GAP) aluminized explosives, the detonation velocity and specific kinetic energy was 8567 m/s and 1.412 kJ/g, which was 1.3% and 5.1% higher than the corresponding physical mixtures. The reaction of the core-shell HMX@(Al@GAP) and the physical mixtures were calculated by ReacFF-/g force field, showing remarkable dependent of the average temperature on the microstructure. Present research might provide new insight for synergistically improvement of mechanical and detonation properties in aluminized explosives.