SUPERCONDUCTING PROPERTIES OF Nb3Sn MULTIFILAMENTARY WIRES FABRICATED BY INTERNAL TIN PROCESS.

Abstract

Since the discovery of the 'bronze process' for fabrication of multifilamentary A15 superconducting wires, extensive effort has been made on development of large scale production and on the characterization of metallurgical and superconducting properties of these wires. However, one primary disadvantage of the manufacturing process is that the bronze matrix hardens rapidly with reduction in size such that the wires have to be annealed. In order to avoid this difficulty, a new process, the internal-tin process, was developed.