Title :
Superconducting joints formed between powder-in-tube Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub z//Ag tapes
Author :
Tkaczyk, J.E. ; Arendt, R.H. ; Bednarczyk, P.J. ; Garbauskas, M.F. ; Jones, B.A. ; Kilmer, R.J. ; Lay, K.W.
Author_Institution :
General Electric Corp. Res. & Dev., Schenectady, NY, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
Superconducting joints between Ag-clad, Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub z/ tapes have been obtained with approximately 1/2 the current capacity of the tapes themselves. The Ag sheath is removed from one side of each tape without significantly disturbing the superconducting core. The exposed superconducting core of the two tapes is brought into contact and pressed so as to again seal the superconductor in a Ag sheath. A reaction anneal is performed to join the two cores together and repair damage associated with the removal of Ag and the pressing. Transport measurements using multiple voltage taps have been found useful in characterizing the critical current variation across the joint.<>
Keywords :
annealing; bismuth compounds; calcium compounds; composite superconductors; critical currents; high-temperature superconductors; silver; strontium compounds; superconductive tunnelling; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub z/-Ag; critical current variation; high temperature superconductivity; multiple voltage taps; powder-in-tube tapes; pressing; reaction anneal; superconducting core; superconducting joints; Bismuth; Fabrication; High temperature superconductors; Joining materials; Silver; Strontium; Superconducting films; Superconducting integrated circuits; Superconducting magnets; Superconducting materials;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
