Browsing by Keyword "Bending stress"
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Item Tensile and Bending Strain Tolerance of Ex Situ MgB2/Ni/Cu Superconductor Tape(2015-04-01) Kovac, P.; Kopera, L.; Melisek, T.; Sarmiento, G.; Sanz, Santiago; Brisigotti, S.; Nardelli, Davide; Tropeano, Matteo; Kováč, Pavol; Melišek, Tibor; Sanz Castillo, Santiago; Tecnalia Research & InnovationThis 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.