活性材料PTFE/Al动态压缩性能  

The Dynamic Compressive Properties of PTFE/Al Reactive Materials

作　　者：赵鹏铎[1] 卢芳云[1] 李俊玲[1] 陈荣[1] 徐松林[2] 阳世清[2] 

机构地区：[1]国防科技大学理学院,湖南长沙410073 [2]国防科技大学航天材料与工程学院,湖南长沙410073

出　　处：《含能材料》2009年第4期459-462,共4页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助(10672177;10872215)

摘　　要：采用分离式霍普金森压杆（SHPB）实验技术，研究两种不同配比的聚四氟乙烯／铝（PTFE／Al）活性材料（PA265和PA35）在高应变率下的力学压缩性能与加载反应性能，对比分析了铝含量不同对PTFE／Al活性材料的屈服强度，破坏性能，反应性能的影响。研究结果表明：两种PTFE／Al活性材料存在应变率效应，在应变率1000～8000s^-1范围，PA265的屈服应力为32～44MPa，PA35的屈服应力为40～55MPa。铝含量越高，PTFE／Al的屈服强度越高；在应变率3100～5800s^-1范围内，两种材料的破坏应力基本相同，约为143～153MPa；PA265和PA35的临界反应应力分别为157，163MPa；铝粉含量不能高于35％，否则由于缺少足够的氧化剂（PTFE）而普遍出现不完全燃烧反应的现象。The dynamic compressive and reactive properties of two kinds of PTFE/Al reactive materials were studied by the split Hopkinson pressure bars（SHPB）. The effects of Al content on yield stress, fragmented and reaetive properties of PTFE/Al reactive materials were analyzed. Results show that PTFE/Al is sensitive to the strain rate. In the strain rate range of 1000 - 8000 s ^-1 , the yield stress of PA265 is 32 -44 MPa and the yield stress of PA35 is 40 -55 MPa; the yield stress increases with Al content; the fragmented stress is 143 -153 MPa in the strain rate range of 3100- 5800 s^-1f or the PTFE/Al reactive materials; the critical reactive stresses of PA265 and PA35 are 157 MPa and 163 MPa; partial reaction phenomena appear frequently due to lacking of enough oxidant polytetrafluorethylene （PTFE） , if Al content is higher than 35%.

关 键 词：爆炸力学 分离式霍普金森压杆(SHPB) 高应变率 活性材料 聚四氟乙烯(PTFE) 

分 类 号：TQ560.1[化学工程—炸药化工]