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http://dx.doi.org/10.9714/psac.2022.24.3.030

Enhancement of a mechanical property of metal sheaths (Cu and Nb) of MgB2 superconducting wires by E-beam irradiation  

Kim, C.J. (Korea Atomic Energy Research Institute)
Lee, T.R. (Korea University of Technology and Education)
Jun, B.H. (Korea Atomic Energy Research Institute)
Publication Information
Progress in Superconductivity and Cryogenics / v.24, no.3, 2022 , pp. 30-34 More about this Journal
Abstract
Effects of electron beam (EB) irradiation on the mechanical strength of Cu (conducting sheath) and Nb (diffusion barrier) of Cu/Nb/MgB2 superconducting was investigated. Wire- and tape-type Cu/Nb/MgB2 samples were irradiated at E-beam energy of 2.5 MeV and 5 mA and a maximum E-beam dose was 5×1017 e/m2. The hardness value of Cu and Nb region was measured by the Vickers micro-hardness method. In the case of the wire sample, the hardness of Cu and Nb increased proportionally as the dose was increased up to 5×1017 e/m2, whereas in the case of the tape sample, the hardness increased up to a dose of 0.5×1017 e/m2, and decreased slightly 5×1017 e/m2. The hardness increase of Cu and Nb is believed to be due to the decrease of the deformability of Cu and Nb due to the defects formed inside the materials by E-beam irradiation.
Keywords
$MgB_2$; Superconductor; E-beam irradiation; Cu and Nb; Vickers hardness; wire; tape;
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Times Cited By KSCI : 2  (Citation Analysis)
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