典型储氢材料对RDX基温压炸药爆轰性能和热稳定性的影响研究
Effects of Typical Hydrogen Storage Materials on Detonation Performance and Thermal Stability of RDX-Based Thermobaric Explosives
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摘要:为探究典型储氢材料对RDX基温压炸药爆轰性能及热稳定性的影响，本研究通过空中爆炸实验与热分析实验，对分别添加MgH2、TiH2和ZrH2 3种储氢材料的RDX基温压炸药的爆轰特性及热分解行为进行了深入分析。实验结果显示：相较于纯RDX炸药，RDX/MgH2温压炸药展示出更高的冲击波峰值压力和正冲量，分别达到27.8 kPa和8.79 Pa·s，增幅分别为3.73%和5.52%；RDX/MgH2样品的热分解终止温度下降了7℃，活化能降低了9.7 kJ·mol-1；而RDX/TiH2和RDX/ZrH2样品的热分解终止温度分别提升了1.8 ℃和4.6 ℃，活化能分别升高了0.8 kJ·mol-1和5.2 kJ·mol-1。研究结果表明，MgH2能够显著增强RDX炸药的爆轰性能，但会对其热稳定性产生负面影响。相对而言，TiH2和ZrH2的加入则对RDX炸药的热稳定性有改善作用。
Abstract:To investigate the effects of typical hydrogen storage materials on the detonation performance and thermal stability of RDX-based thermobaric explosives, this study conducted air explosion experiments and thermal analysis on RDX explosives with the addition of MgH?, TiH?, and ZrH?. The experimental results show that compared to pure RDX explosive, the RDX/MgH? thermobaric explosive exhibits higher peak shock wave pressure and positive impulse, reaching 27.8 kPa and 8.79 Pa·s, the increases are 3.73% and 5.52% respectively. The termination temperature of RDX/MgH? sample is decreased by 7 ℃ , and its activation energy is decreased by 9.7 kJ·mol-1. In contrast, the termination temperatures of RDX/TiH? and RDX/ZrH? are increased by 1.8 ℃ and 4.6 ℃, respectively, and their activation energies are increased by 0.8 kJ·mol-1and 5.2 kJ·mol-1 respectively. The study demonstrates that MgH? significantly enhances the detonation performance of RDX but reduces its thermal stability, while TiH? and ZrH? improve thermal stability to some extent.
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