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The fabrication and properties of multifilamentary Nb/sub 3/Sn superconductors by the solid-liquid diffusion method

Conference · · Adv. Cryog. Eng.; (United States)
OSTI ID:6233211
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In this paper we describe the manufacturing process and properties of an Nb/sub 3/ Sn superconductor produced by the method of solid-liquid diffusion. The manufactured conductor used 93 wt.% Sn-7 wt.% Cu alloy cores surrounded by Nb. The Sn-Cu alloy became a liquid at the heat-treatment temperature of 690 degrees C. Tin-rich Nb compounds which formed initially during the heat treatment were rapidly transformed into an A15 Nb/sub 3/ Sn superconductor in 50-100 h. The multifilamentary conductor had the high overall critical current density of 1.5 x 10/sup 5/ A/cm/sup 2/ at 10 T. When the conductor was wound as a small coil it generated 11.6 T with a backup field of 10 T. An effort was made to enlarge the conductor size; a rectangular conductor of 2.5 mm x 5.0 mm was capable of carrying 3500 A at 10 T. We are currently constructing a large-scale 12 T magnet with an inner diameter of 400 mm and an outer diameter of 685 mm and a 7 T backup field with this conductor.
Research Organization:
Sumitumo Electric Industries, Ltd. Osaka
OSTI ID:
6233211
Report Number(s):
CONF-810835-
Conference Information:
Journal Name: Adv. Cryog. Eng.; (United States) Journal Volume: 28
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360100 -- Metals & Alloys
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
COMPOSITE MATERIALS
CRITICAL CURRENT
CRYOGENICS
CURRENT DENSITY
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
FABRICATION
HEAT TREATMENTS
MAGNETS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
SUPERCONDUCTORS
TESTING
TIN ALLOYS