Guo Huanguo, Xie Jianwen, Wang Haifu, Yu Qingbo, Zheng Yuanfeng
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
Materials (Basel). 2019 Oct 24;12(21):3486. doi: 10.3390/ma12213486.
The traditional polytetrafluoroethylene (PTFE)/Al reactive material liner shaped charge generally produces insufficient penetration depth, although it enlarges the penetration hole diameter by chemical energy release inside the penetration crater. As such, a novel high-density reactive material liner based on the PTFE matrix was fabricated, and the corresponding penetration performance was investigated. Firstly, the PTFE/W/Cu/Pb high-density reactive material liner was fabricated via a cold pressing/sintering process. Then, jet formation and penetration behaviors at different standoffs were studied by pulse X-ray and static experiments, respectively. The X-ray results showed that the PTFE/W/Cu/Pb high-density reactive material liner forms an excellent reactive jet penetrator, and the static experimental results demonstrated that the penetration depth of this high-density reactive jet increased firstly and then decreased by increasing the standoff. When the standoff was 1.5 CD (charge diameter), the penetration depth of this reactive jet reached 2.82 CD, which was significantly higher than that of the traditional PTFE/Al reactive jet. Moreover, compared with the conventional metal copper jet penetrating steel plates, the entrance hole diameter caused by this high-density reactive jet improved 29.2% at the same standoff. Lastly, the chemical reaction characteristics of PTFE/W/Cu/Pb reactive materials were analyzed, and a semi-empirical penetration model of the high-density reactive jet was established based on the quasi-steady ideal incompressible fluid dynamics theory.
传统的聚四氟乙烯（PTFE）/铝反应材料药型罩聚能装药虽然通过在侵彻坑内释放化学能扩大了侵彻孔径，但通常产生的侵彻深度不足。因此，制备了一种基于PTFE基体的新型高密度反应材料药型罩，并研究了其相应的侵彻性能。首先，通过冷压/烧结工艺制备了PTFE/W/Cu/Pb高密度反应材料药型罩。然后，分别通过脉冲X射线和静态实验研究了不同炸高下的射流形成和侵彻行为。X射线结果表明，PTFE/W/Cu/Pb高密度反应材料药型罩形成了优异的反应射流侵彻体，静态实验结果表明，这种高密度反应射流的侵彻深度随炸高增加先增大后减小。当炸高为1.5倍装药直径（CD）时，这种反应射流的侵彻深度达到2.82倍装药直径，明显高于传统PTFE/铝反应射流。此外，与传统金属铜射流侵彻钢板相比，在相同炸高下，这种高密度反应射流造成的入口孔径提高了29.2%。最后，分析了PTFE/W/Cu/Pb反应材料的化学反应特性，并基于准稳态理想不可压缩流体动力学理论建立了高密度反应射流的半经验侵彻模型。
