Influence of mechanical and plasma shockwaves on the structure and properties of superconductors

The article presents the results of studying the critical temperature, critical current, and field dependencies of superconducting Bi-2223 and MgB2 multilayer tapes after them being subjected to the influence of shock waves generated at the Plasma Focus test bench and mechanical impacts of various i...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-07, Vol.1582 (1), p.12037
Main Authors: Mihailov, B P, Alibekov, S Ya, Krutskih, N A, Egorov, A V, Pavlov, A I, Lysyannikov, A V, Kaizer, Yu F, Kuznetsov, A V
Format: Article
Language:English
Subjects:
Bismuth strontium calcium copper oxide
Case crushing
Critical current (superconductivity)
Critical temperature
Homogeneity
Impurities
Interlayers
Magnesium compounds
Multilayers
Physics
Plasma
Plasma focus
Shock waves
Superconducting tapes
Superconductivity
Superconductors
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Summary:The article presents the results of studying the critical temperature, critical current, and field dependencies of superconducting Bi-2223 and MgB2 multilayer tapes after them being subjected to the influence of shock waves generated at the Plasma Focus test bench and mechanical impacts of various intensities. The influence of the specific energy, the number of impacts, the distance of the samples from the plasma anode, the energy of the falling shock mechanism, and the step of moving the impacts was studied. Studies have shown that the critical current Jc can be increased by 50 % in magnetic fields of 2-3 T. In this case, the grains are crushed, compacted, homogenized, and the impurity content changes. The results of microanalysis of superconducting interlayers in the initial state and after influence of shock-wave of plasma show an improvement in the homogeneity of the distribution of the main components (Mg and B) and impurities (C and O).
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1582/1/012037