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Volume 36 Issue 3
May. 2022
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Chinese Journal of High Pressure Physics  > 2022  >  36(3): 030104.
SUI Zhilei, HU Qiushi, SHANG Hailin, FU Hua, ZHENG Xianxu. Influence of High Temperature Phase Transformation and Cracks on Ignition of HMX Crystal[J]. Chinese Journal of High Pressure Physics, 2022, 36(3): 030104. doi: 10.11858/gywlxb.20220550
Citation: SUI Zhilei, HU Qiushi, SHANG Hailin, FU Hua, ZHENG Xianxu. Influence of High Temperature Phase Transformation and Cracks on Ignition of HMX Crystal[J]. Chinese Journal of High Pressure Physics, 2022, 36(3): 030104. doi: 10.11858/gywlxb.20220550
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Influence of High Temperature Phase Transformation and Cracks on Ignition of HMX Crystal

doi: 10.11858/gywlxb.20220550

  • Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

  • Received Date: 28 Mar 2022
  • Rev Recd Date: 27 Apr 2022
  • Issue Publish Date: 30 May 2022
    Abstract
  • The crystal structure, phase transition and microstructure changes of explosive crystals have important influence on the properties of explosives. In order to study the high temperature phase transition of HMX crystals and the effect of the cracks caused by them on ignition, we performed in situ high temperature Raman spectroscopy and X-ray diffraction on HMX crystals. Moreover, drop weight experiments were also carried out for HMX crystals with different cracks and phase structures. The effects of different temperature loading and post-treatment methods on the phase structure and microstructure of HMX crystals were identified by Raman spectroscopy and X-ray diffraction spectroscopy. Samples with different phase structures and cracks were prepared, and the decoupling of the HMX phase structure and the effect of cracks on ignition was realized. The results of the HMX crystal drop-weight impact experiment showed that the order of sensitivity of the three types of HMX crystals under the drop-weight impact was: crack-containing β-δ phase > β phase with cracks > β phase without cracks. And the reasons why high temperature phase transition and cracks can improve the crystal sensitivity of HMX were also analyzed.

     

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