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      https://www.ias.ac.in/article/fulltext/boms/044/0053

    • Keywords

       

      TATB; neutron diffraction; strain; slip; phase transition.

    • Abstract

       

      TATB (1,3,5-triamino-2,4,6-trinitrobenzene) is a widely used insensitive high-energy explosive. It is significant to study its structural evolution in order to get a credible understand of its properties and performances. Direct mechanical tests such as hardness tests are useful approaches to get information about its mechanical properties and shed light upon the microstructures. However, due to the poor solubility of TATB to most solvents, it is hard to produce large crystals for such tests. Fortunately, microcosmic approaches such as powder diffraction can reinforce it and has low requirement on samples. In this study, series of in-situ neutron diffraction experiments under different pressures areperformed to investigate the structural change and mechanical properties of TATB. The recently reported phase transitionat 4 GPa is studied. The microstrains in normal TATB (12-17 $\mu$m) are analysed to reveal the information of slip system and transitional process. The lattice parameters and bulk moduli of TATB under different conditions are given. These neutron diffraction results are significant supplement to correlative studies and will help to understand the performances of TATB, such as deformation and phase transition.

    • Author Affiliations

       

      HAO LI1 LIANGFEI BAI1 XIPING CHEN1 LEI XIE1 JUN CHEN2 ZHIJIAN YANG3 LEIMING FANG1 YUANHUA XIA1 GUANGAI SUN1 JIAN GONG1

      1. Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China
      2. Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, China Academy of Engineering Physics, Beijing 100083, China
      3. Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan 621999, China
    • Dates

       
  • Bulletin of Materials Science | News

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