›› 2014, Vol. 23 ›› Issue (7): 76101-076101.doi: 10.1088/1674-1056/23/7/076101
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
闫冠云a, 田强a, 刘佳辉b, 陈波a, 孙光爱a, 黄明b, 李秀宏c
Yan Guan-Yun (闫冠云)a, Tian Qiang (田强)a, Liu Jia-Hui (刘佳辉)b, Chen Bo (陈波)a, Sun Guang-Ai (孙光爱)a, Huang Ming (黄明)b, Li Xiu-Hong (李秀宏)c
摘要: The microstructure evolution of plastic-bonded explosives (PBXs) after thermal stimulus plays a key role in PBX performance. In this paper, the nanoscale pores of thermal-treated octahydro-1,3,5,7-tetranitro-1,3,5,7 tetrazocine (HMX)-based PBXs with different HMX particle sizes [approximately 40 (FHP) and 100 μm (LHP)] were measured using small-angle X-ray scattering (SAXS). No obvious pore variations were found in the LHP samples heated at 160 ℃ for 6 h, whereas the amount of pores of FHP decreased when subjected to 160 ℃ for 6 h. At 180 ℃, the average pore radii of FHP and LHP decreased from approximately 45 nm to 25 nm, and the total pore volume increased distinctively because of phase transformation. The LHP sample reached a high level of pore content after being held at 180 ℃ for 1 h, whereas FHP required 3 h. Both FHP and LHP had relatively high pore volumes when subjected to 200 ℃ for 1 and 3 h.
中图分类号: (X-ray scattering (including small-angle scattering))