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Small-angle X-ray analysis of the effect of grain size on the thermal damage of octahydro-1, 3, 5, 7-tetranitro-1, 3, 5, 7 tetrazocine-based plastic-bounded expolsives |
| 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 |
a Key Laboratory for Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;
b Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China;
c Institute of Shanghai Apply Physics, Chinese Academy of Sciences, Shanghai 201800, China |
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Abstract 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.
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Received: 15 October 2013
Revised: 02 January 2014
Accepted manuscript online:
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PACS:
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61.05.cf
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(X-ray scattering (including small-angle scattering))
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71.55.-i
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(Impurity and defect levels)
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65.60.+a
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(Thermal properties of amorphous solids and glasses: heat capacity, thermal expansion, etc.)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11205137, 11079043, and 11302199). |
Corresponding Authors:
Tian Qiang
E-mail: tqsuperego@163.com
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| About author: 61.05.cf; 71.55.-I; 65.60.+a |
Cite this article:
Yan Guan-Yun (闫冠云), Tian Qiang (田强), Liu Jia-Hui (刘佳辉), Chen Bo (陈波), Sun Guang-Ai (孙光爱), Huang Ming (黄明), Li Xiu-Hong (李秀宏) Small-angle X-ray analysis of the effect of grain size on the thermal damage of octahydro-1, 3, 5, 7-tetranitro-1, 3, 5, 7 tetrazocine-based plastic-bounded expolsives 2014 Chin. Phys. B 23 076101
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