Al/PTFE/W反应材料的准静态压缩性能与冲击释能特性

Quasi-static Compression Properties and Impact Energy Release Characteristics of Al/PTFE/W Reactive Materials

为了提高铝/聚四氟乙烯/钨(Al/PTFE/W)氟聚物基反应材料的冲击反应毁伤效能,开展了Al/PTFE/W反应材料的准静态压缩实验。分析了W的含量(0%,30%,65%)、Al颗粒粒径(13,45,75μm)以及PTFE颗粒尺寸(25,160μm)对反应材料的准静态力学性能的影响。用准静态密闭反应容器对反应材料进行了冲击释能测试,测得反应材料在750~1200 m·s^(-1)的冲击反应压力、释能持续时间。分析了Al颗粒粒径及PTFE材料粒径对冲击反应释能特性的影响。结果表明,当W的含量为0,30%和65%时,反应材料的失效强度分别为55.6、64.8和22.8 MPa,W的含量变化对屈服强度的影响不大。Al颗粒的尺寸从75μm减小到13μm时,反应材料的失效强度从64.7 MPa提高到83.1 MPa,提高幅度为28.4%。增大PTFE基体材料的粒径也可有效地提高反应材料的失效强度。反应材料的初始反应压力阈值和释放能量持续时间受材料粒径和准静态压缩力学性能的影响。

To improve the impact reaction damage effectiveness of Al/PTFE/W fluoropolymer-matrix reactive materials(RM s), quasistatic compression experiments of Al/PTFE/W RMs were carried out. The effects of W content(0%, 30% 65%), A1 particle size(13,45, 75 μm) and PTFE particle size(25, 160 μm) on the quasi-static mechanical properties of the RMs were analyzed. The impact energy release test of the RMs was performed by quasi-sealed reaction vessel, the impact reaction pressure and duration of energy release of the RMs in the range of 750-1200 m · s^(-1) were measured. The influence of A1 particle size and PT FE particle size on the impact reaction energy release characteristics was analyzed. Results show that when the contents of W are 0%,30% and 65%,the failure strength of the RMs is 55.6, 64.8 and 22.8 MPa respectively, and the change in W content has little effect on the yield strength. When the size of A1 particles decreases from 75 μm to 13 μm, the failure strength of the RMs increases from 64.7 MPa to 83.1 MPa, the range increases by 28.4%. Increasing the particle size of the PT FE matrix material can also effectively improve the failure strength of the reactive material. The initial reaction pressure threshold and the duration of energy release of the RMs are affected by the particle size and quasi-static compressive mechanical properties of the materials.