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Strain-induced structural change and mechanical properties of 1,3,5-triamino-2,4,6-trinitrobenzene probed by neutron diffraction

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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 are performed to investigate the structural change and mechanical properties of TATB. The recently reported phase transition at 4 GPa is studied. The microstrains in normal TATB (12–17 µm) 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.

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Acknowledgements

Thanks are due to Haijun Yang at Southwest University of Science and Technology, for assistance in TATB-d6 preparation. This work was supported by NSAF (no. U1730244) and Science Challenge Project (no. TZ2016001).

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Authors and Affiliations

  1. Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621999, China

    Hao Li, Liangfei Bai, Xiping Chen, Lei Xie, Leiming Fang, Yuanhua Xia, Guangai Sun & Jian Gong

  2. Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, China Academy of Engineering Physics, Beijing, 100083, China

    Jun Chen

  3. Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan, 621999, China

    Zhijian Yang

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  1. Hao Li
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  2. Liangfei Bai
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  5. Jun Chen
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  7. Leiming Fang
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Correspondence to Hao Li.

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Li, H., Bai, L., Chen, X. et al. Strain-induced structural change and mechanical properties of 1,3,5-triamino-2,4,6-trinitrobenzene probed by neutron diffraction. Bull Mater Sci 44, 53 (2021). https://doi.org/10.1007/s12034-020-02339-5

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