Manufacture and evaluation of Nb/sub 3/Sn conductors fabricated by the MJR method

Conference · Tue Nov 23 00:00:00 EST 1982

OSTI ID:6770131

McDonald, W K; Curtis, C W; Scanlan, R M; Larbalestier, D C; Marken, K; Smathers, D B

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
• Resource Relation: Conference: Applied superconductivity conference, Knoxville, TN, USA, 30 Nov 1982
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
36 MATERIALS SCIENCE
NIOBIUM ALLOYS
FABRICATION
SUPERCONDUCTING WIRES
TIN ALLOYS
CRITICAL CURRENT
DRAWING
EXTRUSION
MANUFACTURING
PERFORMANCE
ROLLING
ALLOYS
CURRENTS
ELECTRIC CURRENTS
MATERIALS WORKING
WIRES
420201* - Engineering- Cryogenic Equipment & Devices
360101 - Metals & Alloys- Preparation & Fabrication