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Current densities of thin filament MgB2 /Ti/GlidCop® wire

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Abstract:

Fine-filamentary MgB2 /Ti/GlidCop wire has been produced by an in situ process. Hydrostatic extrusion, drawing and two-axis rolling were used for wire deformation up to the size of 0.2 × 0.2 mm2. An averaged filament size of 7.6–14 µm was obtained for two-axis rolled wire and tape, which are the smallest MgB2 filaments known so far. Very short annealing periods (3–7 min) were used for the thinnest filaments, resulting in a critical current density of ≈12 000 A cm − 2 at 8 T and 4.2 K. The results presented demonstrate the ability to prepare uniform ≈10 µm size and high current density filamentary MgB2 wires in nonmagnetic sheaths, which can be applied for DC and AC coils.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0953-2048/24/10/105006

Publication date: October 1, 2011

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