One-step internal-tin Nb/sub 3/Sn superconductor fabrication. Final report, June 1983-August 1984
The object of this research is to demonstrate the feasibility of producing a Nb/sub 3/Sn superconductor in a single extrusion process with a large number of filaments with internal tin. The technique chosen uses .010'-diameter Nb and tin-plated Cu wires formed into a solenoid. The solenoid is covered with tin-plated copper foil and isostatically compacted to a pressure of 17,000 psi. The solenoid is slit along its length. This results in a ribbon about 40 inches long by about 5-inches wide, with the Nb wires running across the 5-inch-width. The ribbon is then rolled up (Jelly Roll) around a 0.5 inch diameter Ta covered copper rod to produce a composite of about 1.5 inches in diameter by 5 inches long. The composite geometry is now a cylindrical bundle of 0.010-inch-diameter Nb wire separated from each other by tin-plated copper. Each Nb wire is aligned with the axis of cylinder. The cylinder is slid into a Ta-lined copper extrusion can which is evacuated and sealed. The can is extruded at a low temperature and drawn to final wire size without intermediate annealing. The advantage of the process is that it is an internal tin process with the tin uniformly distributed through the matrix. The Nb is in a relatively soft state having been fully annealed at 0.020-inch diameter. Only one extrusion is required since the bundling technique allows a large number of wires to be precisely aligned and spaced in the matrix.
- Research Organization:
- Oxford Superconducting Technology, Carteret, NJ (USA)
- OSTI ID:
- 6450233
- Report Number(s):
- AD-A-158444/0/XAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
STRUCTURE AND HIGH-FIELD PERFORMANCE OF JELLY ROLL PROCESSED Nb{sub 3}Sn WIRES USING Sn-Ta AND Sn-Ti BASED ALLOY SHEET
The critical current density and microstructural state of an internal tin multifilamentary superconducting wire
Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
NIOBIUM ALLOYS
COMPACTING
SUPERCONDUCTORS
FABRICATION
TIN ALLOYS
ALIGNMENT
ANNEALING
COPPER
EXTRUSION
FILAMENTS
GEOMETRY
LOW TEMPERATURE
PLATING
RODS
SOLENOIDS
TANTALUM
TIN
ALLOYS
DEPOSITION
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
HEAT TREATMENTS
MATERIALS WORKING
MATHEMATICS
METALS
SURFACE COATING
TRANSITION ELEMENTS
360101* - Metals & Alloys- Preparation & Fabrication
420201 - Engineering- Cryogenic Equipment & Devices