Abstract The use of metal powder as a fuel in the high-energy materials (HEMs) for the propulsion is the most energy-efficient method to increase the specific impulse and improve the combustion characteristics in the chamber. HEMs typically contain aluminum powders with different particle size distribution. To improve the ignition characteristics of the Al-based HEMs, it is advisable to use nonmetals, metals or their oxides as a catalyst. This paper presents the experimental data on the thermal decomposition and ignition of HEM samples based on ammonium perchlorate, butadiene rubber containing nanopowders (NP) of Alex aluminum, amorphous boron, iron, titanium, and copper. Additives of 2 wt% iron and copper NP in the HEM sample with Alex decrease the ignition delay time by 11–16% when the sample is ignited by a CO2 laser in the range of heat flux density of 60–200 W/cm2. They also increase the recoil force of the gasification products outflow with the HEM surface by 1.3–1.5 times due to reduced temperatures of the onset and intense decomposition of HEM under heating. The partial replacement of Alex by a 5 wt% boron NP in the HEM sample reduces the ignition delay time by up to 20%.

中文翻译：

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B、Fe、Ti、Cu纳米粉体对铝基高能材料激光点火的影响

摘要 在高能材料（HEMs）中使用金属粉末作为燃料进行推进是增加比冲和改善燃烧室燃烧特性最节能的方法。HEM 通常包含具有不同粒度分布的铝粉。为了提高铝基 HEM 的点火特性，建议使用非金属、金属或其氧化物作为催化剂。本文介绍了基于高氯酸铵、含有亚历克斯铝、无定形硼、铁、钛和铜的纳米粉末 (NP) 的丁二烯橡胶的 HEM 样品的热分解和点火实验数据。当样品被 CO2 激光器在 60-200 W/cm2 的热通量密度范围内点燃时，在带有 Alex 的 HEM 样品中添加 2 wt% 的铁和铜 NP 添加剂可将点火延迟时间减少 11-16%。由于加热下 HEM 的起始温度降低和强烈分解，它们还将随 HEM 表面流出的气化产物的反冲力增加了 1.3-1.5 倍。在 HEM 样品中用 5 wt% 的硼 NP 部分替代 Alex 可将点火延迟时间减少多达 20%。