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Mechanism of the formation of structure during high-temperature annealing of MgB2 bulk samples deformed under pressure

  • Superconductivity
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Abstract

MgB2 superconductors subjected to deformation under pressure on Bridgeman anvils and subsequent annealings at 800 and 950°C were investigated by X-ray diffraction, scanning electron microscopy, and microanalysis. It was shown that at these temperatures crystals of MgB2 phase along the residual boron dissolute in the residual liquid magnesium with the formation of both dense and loose areas of MgB2 phase. The latter has a negative influence on critical current. At the same time, after these treatments, the samples become more uniform by the phase and chemical composition.

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Authors and Affiliations

  1. Institute of Physics of Metals, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia

    E. I. Kuznetsova, M. V. Degtyarev, Yu. V. Blinova, S. V. Sudareva, Yu. N. Akshentsev & V. P. Pilyugin

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  1. E. I. Kuznetsova
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  2. M. V. Degtyarev
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  3. Yu. V. Blinova
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  4. S. V. Sudareva
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  5. Yu. N. Akshentsev
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  6. V. P. Pilyugin
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Corresponding author

Correspondence to S. V. Sudareva.

Additional information

Original Russian Text © E.I. Kuznetsova, M.V. Degtyarev, Yu.V. Blinova, S.V. Sudareva, Yu.N. Akshentsev, V.P. Pilyugin, 2017, published in Fizika Tverdogo Tela, 2017, Vol. 59, No. 9, pp. 1673–1679.

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Kuznetsova, E.I., Degtyarev, M.V., Blinova, Y.V. et al. Mechanism of the formation of structure during high-temperature annealing of MgB2 bulk samples deformed under pressure. Phys. Solid State 59, 1695–1701 (2017). https://doi.org/10.1134/S1063783417090153

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  • DOI: https://doi.org/10.1134/S1063783417090153

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