Mechanisms of Cold Deformation under High Pressure of Superconductive MgB2 Ceramics
- Authors: Kuznetsova E.I.1, Krinitsina T.P.1, Sudareva S.V.1, Blinova Y.V.1, Degtyarev M.V.1, Akshentsev Y.N.1
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Affiliations:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Issue: Vol 119, No 8 (2018)
- Pages: 802-809
- Section: Strength and Plasticity
- URL: https://journals.rcsi.science/0031-918X/article/view/167768
- DOI: https://doi.org/10.1134/S0031918X18080070
- ID: 167768
Cite item
Abstract
Structures of the massive MgB2 samples deformed in Bridgman anvils that were initially in different structural states, namely, as-synthesized and post-four-stage-treated (via deformation + annealing), have been studied by methods of the X-ray diffraction, scanning and transmission electron microscopy, and measurements of microhardness. The process of the deformation of brittle ceramic samples of MgB2 under high pressure has been discussed. An analysis of the obtained data has shown that the plastic deformation of the superconductor MgB2 preliminarily compacted by a four-stage treatment has been implemented in the main through the mutual rotation of crystallites (grains) and by grain-boundary sliding without a noticeable refinement of the grain structure.
Keywords
About the authors
E. I. Kuznetsova
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: monocrist@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
T. P. Krinitsina
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: monocrist@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
S. V. Sudareva
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: monocrist@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
Yu. V. Blinova
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: monocrist@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
M. V. Degtyarev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: monocrist@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
Yu. N. Akshentsev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: monocrist@imp.uran.ru
Russian Federation, Ekaterinburg, 620108