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Structure and mechanical properties of foils made of nanocrystalline beryllium

  • Structure of Inorganic Compounds
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Abstract

The phase composition and structural features of (45–90)-μm-thick foils obtained from nanocrystalline beryllium during multistep thermomechanical treatment have been established using electron microscopy, electron diffraction, electron backscattering diffraction, and energy-dispersive analysis. This treatment is shown to lead to the formation of a structure with micrometer- and submicrometer-sized grains. The minimum average size of beryllium grains is 352 nm. The inclusions of beryllium oxide (ВеО) of different modifications with tetragonal (sp. gr. P42/mnm) and hexagonal (sp. gr. P63/mmc) lattices are partly ground during deformation to a size smaller than 100 nm and are located along beryllium grain boundaries in their volume, significantly hindering migration during treatment. The revealed structural features of foils with submicrometer-sized crystallites provide the thermal stability of their structural state. Beryllium with this structure is a promising material for X-ray instrument engineering and for the production of ultrathin (less than 10 μm) vacuum-dense foils with very high physicomechanical characteristics.

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Correspondence to O. M. Zhigalina.

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Original Russian Text © O.M. Zhigalina, A.A. Semenov, A.V. Zabrodin, D.N. Khmelenin, D.A. Brylev, A.V. Lizunov, A.L. Nebera, I.A. Morozov, A.S. Anikin, A.S. Orekhov, A.N. Kuskova, V.V. Mishin, A.V. Seryogin, 2016, published in Kristallografiya, 2016, Vol. 61, No. 4, pp. 526–534.

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Zhigalina, O.M., Semenov, A.A., Zabrodin, A.V. et al. Structure and mechanical properties of foils made of nanocrystalline beryllium. Crystallogr. Rep. 61, 549–557 (2016). https://doi.org/10.1134/S1063774516040283

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  • DOI: https://doi.org/10.1134/S1063774516040283

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