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Touching the properties of NbTi by carbon doped tapes with mechanically alloyed MgB2

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6 Author(s)
Herrmann, M. ; Institute for Metallic Materials, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany ; Haessler, W. ; Rodig, Christian ; Gruner, Wolfgang
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Combining mechanical alloying and powder-in-tube processing is a promising way to obtain tapes with excellent properties. Taking advantage of the properties of nanocrystalline precursor powders, it was possible to obtain Jc values of 104 A/cm2 at 12.1 T and 4.2 K. Evidential substitution of carbon into the MgB2 changed the electron scattering and therefore raised the Bc2 up to 12 T at 10 K. Systematic investigation on the influence of the heat treatment showed that, although an interfering Fe2B reaction layer was formed, an excellent Jc of 104 A/cm2 at 14.3 T and 4.2 K was achieved.

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Applied Physics Letters  (Volume:91 ,  Issue: 8 )