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Development of MgB 2 Wires

T. C SAM. Development of MgB 2 Wires. H. Fang and K. Salama Texas Center for Superconductivity and Advanced Materials University of Houston, Houston, TX 77204-5002. Texas Center for Superconductivity and Advanced Materials University of Houston NASA Commercial Space Center. T. C SAM.

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Development of MgB 2 Wires

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  1. T CSAM Development of MgB2 Wires H. Fang and K. Salama Texas Center for Superconductivity and Advanced MaterialsUniversity of Houston, Houston, TX 77204-5002 Texas Center for Superconductivity and Advanced Materials University of Houston NASA Commercial Space Center

  2. T CSAM Mg and B raw powder High-energy ball milling Ultra-fine Mg and B mixture precursor Square wire 1mm by 1mm Groove-rolling the powder-filled tube Filling precursor into 1020 iron tube Flat-rolling the square wire Tape 2.5 mm wide and 0.2 mm thick Annealing at 800 ~950 oC Texas Center for Superconductivity and Advanced Materials University of Houston NASA Commercial Space Center Fabrication Process (Powder-In-Tube)

  3. T CSAM Texas Center for Superconductivity and Advanced Materials University of Houston NASA Commercial Space Center Tape Morphology Cross-sectional Longitudinal

  4. T CSAM Texas Center for Superconductivity and Advanced Materials University of Houston NASA Commercial Space Center Critical Current Density ~ Field T = 20 K T = 25 K T = 30 K

  5. T CSAM Texas Center for Superconductivity and Advanced Materials University of Houston NASA Commercial Space Center 10-Meter Long Square Wire

  6. T CSAM Texas Center for Superconductivity and Advanced Materials University of Houston NASA Commercial Space Center Superconducting Coil • The coil has an outer diameter of 12 mm and 12 turns.

  7. T CSAM Texas Center for Superconductivity and Advanced Materials University of Houston NASA Commercial Space Center Critical Current ~ Field of Coil

  8. T CSAM Texas Center for Superconductivity and Advanced Materials University of Houston NASA Commercial Space Center Conclusions • Iron-clad MgB2 superconducting tapes and wires were fabricated using the standard powder-in-tube method. • Nano-sized Mg and B mixture powder was used as starting precursor. • Measurements on short length tape shows a Jc of 1.2 X 105 A/cm2 at 20 K and 1.5 Tesla. • 10 meter long square wire with outer cross-section area 1 mm by 1 mm was manufactured. A coil wound from this wire shows a Ic of 160 A at 20 K and 1 Tesla.

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