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

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

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

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

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

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

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

8. Texas Center for Superconductivity and Advanced Materials
University of Houston
NASA Commercial Space Center
CSAM T
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.