High Transition Temperature Superconductors -V3Ga Wire Development.
Abstract
Increased V3Ga growth rates resulting from the use of high gallium content V-Ga filaments and Cu-Ga matrix alloys are utilized to improve the critical current density in the superconductor, J sub c, by forming thin layers of V3Ga at rather low reaction temperatures. Studies of J sub c as functions of magnetic field strength and temperature are reported and compared with similar data for experimental Nb3Sn wires, commercial V3Ga tapes, and Nb-Ti wire. These data document the superiority of V3Ga over a broad range of magnetic fields and temperatures. Based on results of these investigations of processing variables, specifications for high current (I sub c) multifilament V3Ga wires were defined and an industrial contract for their production was awarded (pertinent specifications appended). Studies of stress effects on I sub c have shown these developmental wires resistant to degradation at acceptable stress levels. Further work in this area is recommended for future superconducting applications. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1978
- Accession Number
- ADA060713
Entities
People
- David G. Howe
- Donald U. Gubser
- Robert A. Hein
- Russell A. Meussner
- Thomas L. Francavilla
Organizations
- United States Naval Research Laboratory