Novel processing of HTS based conductors

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:7149860

Ginley, D. S.; Venturini, E. L.; Kwak, J. F.; Baughman, R. J.; Bourcier, R. J.; Mitchell, M. A.; Morosin, B. ^[1]; Halloran, J. W.; Neal, M. J. ^[2]; Capone, D. W. ^[3]

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1. Sandia National Labs., Albuquerque, NM (USA)
2. Ceramics Process Systems Corp., Milford, MA (USA)
3. Supercon, Inc., Shrewsbury, MA (USA)

Conductor development is one of the major long term goals in high temperature superconductor research. In this paper we report on two promising processing technologies that have been utilized to produce superconducting HTS conductors. First, melt spun YBa{sub 2}Cu{sub 3}O{sub 7} fibers rapid thermal processed for 1--8 sec at 950 to 1075{degree}C have {Tc}'s to 92 K, J{sub c}'s to 1100 A/cm{sup 2} and the orthorhombic twinned morphology typical for high quality YBa{sub 2}Cu{sub 3}O{sub 7}. A processing matrix of time, temperature and composition for these fibers shows that slightly CuO-rich starting compositions give the best results. Second, silver tube encapsulated wires of Bi{sub 1.7}Pb{sub 0.3}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} have been made by extrusion, wire drawing and cold rolling. The resulting tapes show orientation of the crystallites, zero resistance up to 100K and improved magnetic hysteresis above 50 K. The combination of mechanical reprocessing and extended thermal anneals near 850{degree}C appears to significantly improve these materials. 13 refs., 7 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7149860
• Report Number(s): SAND-89-2959C; CONF-900466-1; ON: DE90005956
• Resource Relation: Conference: Spring meeting of the Materials Research Society, San Francisco, CA (USA), 16-21 Apr 1990
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
SUPERCONDUCTING DEVICES
PROCESSING
ANNEALING
BARIUM
BISMUTH
CALCIUM
CERAMICS
COPPER
ELECTRICAL PROPERTIES
JOSEPHSON JUNCTIONS
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MAGNETIC FIELDS
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MECHANICAL PROPERTIES
MORPHOLOGY
ORTHORHOMBIC LATTICES
OXYGEN
SILVER
STABILITY
STRONTIUM
SYNTHESIS
TECHNOLOGY ASSESSMENT
TEMPERATURE EFFECTS
TETRAGONAL LATTICES
USES
YTTRIUM
ALKALINE EARTH METALS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELEMENTS
HEAT TREATMENTS
JUNCTIONS
METALS
NONMETALS
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
TESTING
TRANSITION ELEMENTS
426001* - Engineering- Superconducting Devices & Circuits- (1990-)
360104 - Metals & Alloys- Physical Properties
360204 - Ceramics
Cermets
& Refractories- Physical Properties