Hydrostatic extrusion of in situ process superconductive wire for use in NMR magnets
In the investigation reported here, a total of 33 Cu-Nb billets were hydrostatically extruded, a safe extrusion range was characterized by use of the extrusion ratio, and die semi-cone angle was mapped. Billet preparation, the preparation and insertion of the Sn-Cu core, and billet extrusion for the alloy Sn-5 wt% Cu are described. For drawing purposes, a billet that had been extruded at a 7-degree semi-cone die angle and 74% reduction in area was cold drawn without intermediate anneals from the extruded diameter of 0.192 in. to the final diameter of 0.0204 in. During drawing there were no signes of wire instability. The wires were successfully heat treated, and yielded an in situ superconductor with critical current densities comparable to that of smaller wires prepared from the same Cu-Nb ingot. Micrographs are provided.
- Research Organization:
- Intermagnetics General Corporation, Guilderland, NY
- OSTI ID:
- 6019225
- Report Number(s):
- CONF-810835-
- Journal Information:
- Adv. Cryog. Eng.; (United States), Journal Name: Adv. Cryog. Eng.; (United States) Vol. 28; ISSN ACYEA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Technical report on manufacture of Nb/sub 3/Sn superconducting wire by cold hydrostatic extrusion
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
COPPER ALLOYS
CRYOGENICS
EXTRUSION
FABRICATION
HEAT TREATMENTS
HYDROSTATICS
IN-SITU PROCESSING
MAGNETIC RESONANCE
MATERIALS WORKING
NIOBIUM ALLOYS
NUCLEAR MAGNETIC RESONANCE
PROCESSING
RESONANCE
SUPERCONDUCTING WIRES
SUPERCONDUCTORS
TIN ALLOYS
WIRES