Abstract
Structural transformations of polycrystalline boron have been studied under megabar multiple-shock compression. Shock-wave experiments on the compression and subsequent recovery of polycrystalline samples of β-rhombohedral boron β-B106 have been performed. Thermodynamic states of boron under the conditions of the performed experiments have been calculated. According to these calculations, the maximum pressure in the samples is 115 GPa. X-ray diffraction analysis of the stored boron samples has been performed. It has been shown that the dynamic compression of polycrystalline β-B106 to 115 GPa results in its partial amorphization and transformation to the tetragonal modification of boron T-B192.
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Original Russian Text © A.M. Molodets, A.A. Golyshev, 2018, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2018, Vol. 108, No. 6, pp. 430–434.
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Molodets, A.M., Golyshev, A.A. Amorphization and a Polymorphic Transformation of Boron Stimulated by High Dynamic Pressures. Jetp Lett. 108, 409–413 (2018). https://doi.org/10.1134/S002136401818008X
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DOI: https://doi.org/10.1134/S002136401818008X