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任会兰 , 李尉 , 刘晓俊 , 等 . 钨颗粒增强铝/聚四氟乙烯材料的冲击反应特性 [J ] . 兵工学报 , 2016 , 37 ( 5 ): 872 - 878 . DOI: 10.3969/j.issn.1000-1093.2016.05.014 http://doi.org/10.3969/j.issn.1000-1093.2016.05.014 针对模压烧结法制备的4种不同配比的铝/钨/聚四氟乙烯(Al/W/PTFE)反应材料，采用分离式霍普金森压杆加载方法和高速摄影技术研究其冲击反应特性。实验结果表明：随着W含量的增加，反应材料的屈服强度和破坏强度提高；反应材料的应力-应变曲线分为弹性阶段、硬化阶段和破坏阶段，动态压缩特性具有明显的应变率效应；Al/W/PTFE反应材料的冲击反应过程可分为变形、破坏和燃烧反应；Al/W/PTFE反应材料中增加W含量，提高了材料的反应应变率阈值和比能量阈值。

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HU R , JIANG C L , MAO L , et al . Effect of Al particle size on the shock-induced reaction characteristics of Al-rich PTFE/Al composites [J ] . Acta Armamentarii , 2022 , 43 ( 1 ): 48 - 56 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2022.01.006 http://doi.org/10.3969/j.issn.1000-1093.2022.01.006 The effect of Al particle size on the shock-induced reaction characteristics of PTFE/Al reactive material with a mass ratio of 50∶50 is investigated. 4 kinds of PTFE/Al reactive material specimens with different Al particle sizes were prepared by molding and sintering. The reactive material specimens were tested by using split-Hopkinson pressure bar (SHPB), and the shock-induced reaction processes of PTFE/Al reactive material at different strain rates were recorded with a high-speed camera. The results show that, as the Al particle size increases from 50 nm to 10 μm, the reaction delay rises up to 40% and the reaction duration decreases up to 17%, while the amount of reactive material participating in the reaction decreases, and the reaction intensity and energy release decrease. When the Al particle size increases to 70 μm, it is difficult to ignite under SHPB loading. The strain rate also greatly influences the reactive characteristics of reactive material,and the reaction delay of PTFE/Al reactive material decreases with the increase in the loading strain rate. The results show that Al particle size greatly influences the impact reaction diffusion, reaction speed, and extent of reaction of PTFE/Al reactive material, and its impact reaction property can be adjusted by adjusting Al particle size.

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YANG X L , HE Y , HE Y , et al . Investigation of the shock compression behaviors of Al/PTFE composites with experimental and a 3D mesoscale-model [J ] . Defence Technology , 2022 , 18 ( 1 ): 62 - 71 . DOI: 10.1016/j.dt.2020.11.020 http://doi.org/10.1016/j.dt.2020.11.020 The responses of Al/PTFE reactive materials (RMs) under shock compression were investigated by a single-stage gas gun. A 3D mesoscale-model was established based on micro-computed tomography (micro-CT) slice images and confirmed with experimental results. In the high-pressure stage, the composites reacted partially, whereas there were no deviations between the partially reacted Hugoniot and the inert simulation results. The simulation reveals that the Teflon matrix melting on the high shock pressure. Melts and decomposition of the PTFE accelerated the diffusion of the atoms. Thus, the reactions of the Al/PTFE composites are more like a combustion rather than a detonation. © 2022 China Ordnance Society

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