Recent developments in processing HTS silver-clad Bi-2223 tapes, coils and test magnets

Conference · Fri Oct 01 04:00:00 EDT 1993

OSTI ID:10194596

Haldar, P; Hoehn, Jr, J G ^[1]; Motowidlo, L R ^[2]; Balachandran, U ^[3]; Iwasa, Y; Yunus, M ^[4]

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1. Intermagnetics General Corp., Guilderland, NY (United States)
2. IGC Advanced Superconductors, Inc., Waterbury, CT (United States)
3. Argonne National Lab., IL (United States)
4. Massachusetts Inst. of Technology, Cambridge, MA (United States). Francis Bitter National Magnet Lab.

Considerable progress has been made in fabricating Bi-2223 high temperature superconductor (HTS) wires and tapes with high critical current densities that are attractive for electric power and high-field magnet applications. Powder-in-tube processed silver-clad Bi-2223 short tape samples, small coils and test magnets have been fabricated and measured at liquid nitrogen (77K), pumped liquid nitrogen (64 K), liquid neon (27K) and liquid helium (4.2K) temperatures. Optimization of thermo-mechanical process parameters have yielded J{sub c}`s in the superconducting core > 4.0 {times} 10{sup 4} A/cm{sup 2} at 77K zero field and > 2.0 {times} 10{sup 5} A/cm{sup 2} at 4.2K, zero field. Long lengths (up to 70 m) of mono-core conductors were fabricated and tested to carry significant amounts of current (23 A, {approximately}15,000 A/cm{sup 2}) at liquid nitrogen temperature. Recent test magnets assembled from pancake wound coils were measured to generate magnetic fields as high as 2.6, 1.8 and 0.36 Tesla at 4.2K, 27K and 77K respectively. These results show promise towards practical utilization of HTS materials.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10194596
• Report Number(s): ANL/ET/CP--81141; CONF-931073--2; ON: DE94002903
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201
665412
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
FABRICATION
HIGH-TC SUPERCONDUCTORS
LEAD OXIDES
MAGNETIC FIELDS
PERFORMANCE TESTING
PREPARATION AND FABRICATION
SILVER
STRONTIUM OXIDES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
SUPERCONDUCTING WIRES
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K