磁场辐射下TNT晶体性能的变化特性  

Theoretically and Experimentally Revealed the Response of TNT Crystal to Strong Magnetic Field

作　　者：任海超 贾宪振[1] 刘瑞鹏[1] 王昊 孙晓宇 张增明[2] 陶俊[1] 王晓峰[1] REN Hai-chao;JIA Xian-zhen;LIU Rui-peng;WANG Hao;SUN Xiao-yu;ZHANG Zeng-ming;TAO Jun;WANGXiao-feng(Xi′an Modern Chemistry Research Institute,Xi′an 710065,China;School of Physical Sciences,University of Science and Technology of China,Hefei 230022,China)

机构地区：[1]西安近代化学研究所,陕西西安710065 [2]中国科学技术大学物理学院,安徽合肥230022

出　　处：《含能材料》2024年第11期1154-1161,共8页Chinese Journal of Energetic Materials

摘　　要：为了解强磁场辐射下三硝基甲苯(TNT)晶体性能的变化特性,借助扫描电子显微镜仪研究了磁场辐射(0,6 T)下TNT晶体形貌,利用X射线衍射仪和拉曼光谱分析了磁场辐射后TNT晶格的变化,采用差示扫描量热仪(DSC)获得了磁场辐射下TNT的热分解特性。基于分子动力学模拟,探讨了磁场辐射下(0,3,6 T和8 T)TNT的晶格常数、微观分布、力学性能和撞击感度变化情况。结果表明:TNT晶体受到6 T磁场辐射后,微观形貌由辐射前的鳞片针状结构转变为不规则的块状结构,热分解放热峰温度由289.6℃升高到304.1℃,但TNT的晶体相结构和晶格常数未发生明显改变。TNT晶格常数不受磁场辐射的影响,但磁场会改变TNT分子在晶体内部的分布。8 T磁场辐射能显著改善TNT晶体的延展性。通过比较最长引发键的占比,发现8 T磁场会增加TNT晶体的撞击感度。To gain a comprehensive understanding of the properties changes of TNT crystals under strong magnetic field radiation,the morphological changes,the lattice constants and the thermal decomposition characteristic were explored using the scanning electron microscope,X-ray diffraction,Raman spectroscopy and differential scanning calorimeter(DSC),respectively.Moreover,the variations of lattice constants,molecules distributions,mechanical properties and theoretical impact sensitivity of TNT under magnetic field radiation were investigated by molecular dynamics simulations.The experimental results,with the application of 6 T magnetic field,showed that the microscopic morphology was changed from the scale-needle structure to the irregular block structure,and the exothermic peak temperature of thermal decomposition was increased from 289.6℃to 304.1℃.However,the crystal phase structure and lattice constants of the TNT remained unchanged.Furthermore,theoretical investigations indicated that the TNT lattice constant not affected by magnetic field radiation,but the magnetic field did change the molecules distribution in the TNT crystal.The 8 T magnetic field radiation significantly improved the ductility of TNT.However,it simultaneously increased the impact sensitivity of TNT by comparing the ratio for the longest trigger bonds.

关 键 词：磁场 微观形貌 热分解 分子动力学 力学模量 撞击感度 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]