Manufacture and evaluation of Nb/sub 3/Sn conductors fabricated by the MJR method
The bronze matrix/niobium filament process has become established as a commercially viable method for producing multifilamentary Nb/sub 3/Sn superconductors. This paper describes a new method, the Modified Jelly-Roll (MJR) approach, which can produce a structure similar to that in a conventionally fabricated multifilamentary Nb/sub 3/Sn conductor. This approach utilizes alternate sheets of niobium expanded metal and bronze, which are rolled into a jelly-roll configuration and then extruded. During extrusion and subsequent drawing, the junctures in the niobium are elongated and the material develops a filamentary structure. This method may offer significant advantages in terms of reduced fabrication time and cost over the conventional approach. Results of a manufacturing development program will be presented in which two lengths of conductor were made to High-Field Test Facility conductor specifications. In addition, critical current and transition temperature measurements of the sub-elements used to construct the HFTF-type lengths will be reported.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA); Wisconsin Univ., Madison (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6770131
- Report Number(s):
- UCRL-87705; CONF-821108-20; ON: DE83006555
- Country of Publication:
- United States
- Language:
- English
Similar Records
Testing results of multifilamentary Nb/sub 3/Sn composites made by a modified jellyroll method
Testing results of MF-Nb/sub 3/Sn composites made by a modified jellyroll method
Related Subjects
360101 -- Metals & Alloys-- Preparation & Fabrication
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CRITICAL CURRENT
CURRENTS
DRAWING
ELECTRIC CURRENTS
EXTRUSION
FABRICATION
MANUFACTURING
MATERIALS WORKING
NIOBIUM ALLOYS
PERFORMANCE
ROLLING
SUPERCONDUCTING WIRES
TIN ALLOYS
WIRES