Fine‐grained Fe−Al energetic materials have high reaction enthalpies, and the release energy of the iron phase and a large portion of the active aluminium phase in sintered materials enables the replacement of conventional materials in new types of weapons. To study the energy release characteristics of fine‐grained Fe−Al energetic jets under impact loading, a dynamic energy acquisition system is established to quantify the energy generated by the response of fine‐grained Fe−Al energetic jets to impact targets. The pressure‐time curves of fine‐grained Fe−Al energetic jets with different ratios under different impact conditions are obtained, and a method for calculating the pressure differential value is proposed to quantitatively determine the energy release values of fine‐grained Fe−Al energetic jets. The energy release mechanism of the Fe−Al energetic jet is analysed at the micro‐level by recovering the reaction products. The results show that there is an optimal Fe−Al ratio that attains the greatest energy release effect from fine‐grained Fe−Al energetic jets. With increasing impact energy, the energy released by energetic jets tends to increase, and an impact energy threshold that saturates the chemical reaction of energetic materials in the jets exists. The relationship between the impact conditions and the energy release value of fine‐grained Fe−Al energetic jets is established.

中文翻译：

---

细粒铁铝高能射流冲击能释放特性的研究

细颗粒的Fe-Al高能材料具有很高的反应焓，并且烧结材料中铁相和大部分活性铝相的释放能使得可以在新型武器中替代常规材料。为了研究冲击载荷下细颗粒的Fe-Al高能射流的能量释放特性，建立了一个动态能量采集系统，以量化由细颗粒的Fe-Al高能射流对撞击目标的响应所产生的能量。得到了不同冲击条件下不同比例的细粒Fe-Al高能射流的压力-时间曲线，提出了一种计算压差值的方法，定量确定细粒Fe-Al高能射流的能量释放值。喷气机。通过回收反应产物，在微观层面分析了Fe-Al高能射流的能量释放机理。结果表明，存在一个最佳的Fe-Al比，可以从细颗粒的Fe-Al高能射流中获得最大的能量释放效果。随着冲击能量的增加，高能射流释放的能量趋于增加，并且存在使射流中的高能材料的化学反应饱和的冲击能量阈值。建立了冲击条件与细粒Fe-Al高能射流能量释放值之间的关系。高能射流释放的能量趋于增加，并且存在使能流中的高能物质的化学反应饱和的冲击能量阈值。建立了冲击条件与细粒Fe-Al高能射流能量释放值之间的关系。高能射流释放的能量趋于增加，并且存在使能流中的高能物质的化学反应饱和的冲击能量阈值。建立了冲击条件与细粒Fe-Al高能射流能量释放值之间的关系。