Tensile and Bending Strain Tolerance of Ex Situ MgB2/Ni/Cu Superconductor Tape
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2015-04-01
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Abstract
This paper describes the strain tolerance of MgB2/Ni/Cu tape produced by Columbus Superconductors subjected to tension and bending stress. A tension test instrument with freestanding sample was used for stress-strain, I-c-stress, and I-c-strain characteristics at liquid helium temperature. Bending of MgB2/Ni/Cu tape to variable diameters was done at room temperature and in two directions: 1) with a Cu strip on the outer surface (Cu out) of a bent sample; and 2) with a Cu strip on the inner side (Cu in). I-c-bending strain characteristics were measured at 4.2 K and external field B = 6 T oriented perpendicularly to the sample's width. Obtained results have shown the strain limits, which should not be exceeded during the winding process of superconductor containing brittle MgB2 filaments.
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Publisher Copyright: © 2002-2011 IEEE.
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Bending stress , critical current degradation , ex situ MgB2 tape , neutral axis , strain tolerances , tensile stress , Bending stress , critical current degradation , ex situ MgB2 tape , neutral axis , strain tolerances , tensile stress , ex-situ MgB tape , the strain tolerances , Electronic, Optical and Magnetic Materials , Condensed Matter Physics , Electrical and Electronic Engineering , Funding Info , European Union Contract Number 308793 and Slovak Research and Development Agency under program APVV-0495-10 , European Union Contract Number 308793 and Slovak Research and Development Agency under program APVV-0495-10
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Kovac , P , Kopera , L , Melisek , T , Sarmiento , G , Sanz , S , Brisigotti , S , Nardelli , D , Tropeano , M , Kováč , P , Melišek , T & Sanz Castillo , S 2015 , ' Tensile and Bending Strain Tolerance of Ex Situ MgB2/Ni/Cu Superconductor Tape ' , unknown , vol. unknown , no. 2 , 6994767 . https://doi.org/10.1109/TASC.2014.2379723