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Volume 36 Issue 3
May. 2022
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Chinese Journal of High Pressure Physics  > 2022  >  36(3): 030102.
SUI Zhilei, DAI Rucheng, WANG Zhongping, ZHENG Xianxu, ZHANG Zengming. High Pressure Phase Transition of HMX Crystal under Non-Hydrostatic Pressure[J]. Chinese Journal of High Pressure Physics, 2022, 36(3): 030102. doi: 10.11858/gywlxb.20220559
Citation: SUI Zhilei, DAI Rucheng, WANG Zhongping, ZHENG Xianxu, ZHANG Zengming. High Pressure Phase Transition of HMX Crystal under Non-Hydrostatic Pressure[J]. Chinese Journal of High Pressure Physics, 2022, 36(3): 030102. doi: 10.11858/gywlxb.20220559
shu

High Pressure Phase Transition of HMX Crystal under Non-Hydrostatic Pressure

doi: 10.11858/gywlxb.20220559
  • 1.

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

  • 2.

    School of Physics Science, University of Science and Technology of China, Hefei 230026, Anhui, China

  • Received Date: 06 Apr 2022
  • Rev Recd Date: 27 Apr 2022
  • Issue Publish Date: 30 May 2022
    Abstract
  • HMX is a high-energy explosive with excellent performance and is widely used in weapons. The phase transition law of HMX, especially under non-hydrostatic pressure, is controversial. In this work, a high-pressure Raman experimental study of HMX crystals under non-hydrostatic pressure was carried out using different pressure-transmitting media. The HMX crystal undergoes three phase transitions at pressures of 4.9, 13.9 and 17.5 GPa, respectively. Under the pressure of 13.9 GPa, HMX began to undergo phase transition from structure Ⅱ to structure Ⅲ, and the two phases existed simultaneously within a certain pressure range; another new phase (structure Ⅳ) began to appear from 17.5 GPa. The three-phase coexistence of structure Ⅱ, structure Ⅲ and structure Ⅳ appeared in the pressure range of 17.5−23.6 GPa. Importantly, the phase transition process of HMX crystals under non-hydrostatic pressure is completely different from the phase transition path under quasi-hydrostatic pressure, and the pressure gradient under non-hydrostatic pressure environment is the reason for the difference.

     

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