Nano-sized aluminum (Nano-Al) powders hold promise in enhancing the total energy of explosives and the metal acceleration ability at the same time. However, the near-detonation zone effects of reaction between Nano-Al with detonation products remain unclear. In this study, the overall reaction process of 170 nm Al with RDX explosive and its effect on detonation characteristics, detonation reaction zone, and the metal acceleration ability were comprehensively investigated through a variety of experiments such as the detonation velocity test, detonation pressure test, explosive/window interface velocity test and confined plate push test using high-resolution laser interferometry. Lithium fluoride (LiF), which has an inert behavior during the explosion, was used as a control to compare the contribution of the reaction of aluminum. A thermochemical approach that took into account the reactivity of aluminum and ensuing detonation products was adopted to calculate the additional energy release by afterburn. Combining the numerical simulations based on the calculated afterburn energy and experimental results, the parameters in the detonation equation of state describing the Nano-Al reaction characteristics were calibrated. This study found that when the 170 nm Al content is from 0% to 15%, every 5% increase of aluminum resulted in about a 1.3% decrease in detonation velocity. Manganin pressure gauge measurement showed no significant enhancement in detonation pressure. The detonation reaction time and reaction zone length of RDX/Al/wax/80/15/5 explosive is 64 ns and 0.47 mm, which is respectively 14% and 8% higher than that of RDX/wax/95/5 explosive (57 ns and 0.39 mm). Explosive/window interface velocity curves show that 170 nm Al mainly reacted with the RDX detonation products after the detonation front. For the recording time of about 10 μs throughout the plate push test duration, the maximum plate velocity and plate acceleration time accelerated by RDX/Al/wax/80/15/5 explosive is 12% and 2.9 μs higher than that of RDX/LiF/wax/80/15/5, respectively, indicating that the aluminum reaction energy significantly increased the metal acceleration time and ability of the explosive. Numerical simulations with JWLM explosive equation of state show that when the detonation products expanded to 2 times the initial volume, over 80% of the aluminum had reacted, implying very high reactivity. These results are significant in attaining a clear understanding of the reaction mechanism of Nano-Al in the development of aluminized explosives.

纳米铝粉有望同时提高炸药的总能量和金属的加速能力。然而，纳米铝与爆轰产物之间反应的近爆轰区影响尚不清楚。在这项研究中，我们通过各种实验（如爆震速度测试，爆震压力测试，使用高分辨率激光干涉仪的炸药/窗口界面速度测试和密闭板推力测试。氟化锂（LiF）在爆炸过程中具有惰性行为，被用作对照来比较铝反应的贡献。采用了一种热化学方法，该方法考虑了铝的反应性和随之产生的爆炸产物，以计算余燃引起的额外能量释放。结合基于计算出的余燃能量和实验结果的数值模拟，校准了描述纳米铝反应特性的爆轰状态方程中的参数。这项研究发现，当170 nm Al含量从0％到15％时，铝每增加5％会使爆速降低约1.3％。锰压力计的测量结果表明，爆炸压力没有显着提高。RDX / Al / wax / 80/15/5炸药的爆炸反应时间和反应区长度分别为64 ns和0.47 mm，比RDX / wax / 95/5炸药的爆炸反应时间和反应区长度分别高14％和8％（57 ns和0.39毫米）。爆炸/窗口界面速度曲线表明，在爆炸前沿之后，170 nm Al主要与RDX爆炸产物发生反应。在整个推板测试期间大约10μs的记录时间中，RDX / Al / wax / 80/15/5炸药所加速的最大板速度和板加速时间比RDX / LiF高12％和2.9μs。 / wax / 80/15/5，分别表明铝的反应能显着增加了金属的加速时间和炸药的能力。用JWLM爆炸状态方程进行的数值模拟表明，当爆炸产物扩展到初始体积的2倍时，超过80％的铝会发生反应，这表明反应性非常高。