Title :
Ceramic core density and homogeneity in BSCCO/Ag tapes
Author :
Kovac, P. ; Husek, I. ; Pachla, W.
Author_Institution :
Inst. of Electr. Eng., Slovak Acad. of Sci., Bratislava, Slovakia
fDate :
6/1/1997 12:00:00 AM
Abstract :
The monitoring of density by microhardness profiles (HV 0.01) at transverse cross sections of BSCCO/Ag wires and tapes were done after different deformation processes. The results obtained allow better understanding of deformation process of BSCCO/Ag composite and also show what deformation should be used to obtain homogeneous and dense BSCCO-core by powder-in-tube method. The self field transport currents measurements have indicated that optimal value of core density is needed to reach sufficiently high transport currents. Dense ceramic core is not sufficient to reach high J/sub c/ if texture is not improved as well.
Keywords :
bismuth compounds; calcium compounds; composite superconductors; critical current density (superconductivity); deformation; density; microhardness; silver; strontium compounds; superconducting tapes; BiSrCaCuO-Ag; BiSrCaCuO/Ag tapes; HTSC; ceramic core density; critical current density; deformation processes; homogeneity; microhardness profiles; powder-in-tube method; self field transport currents; texture; transverse cross sections; wires; Bismuth compounds; Ceramics; Conductors; Current measurement; Density measurement; Monitoring; Pressing; Swaging; Wires;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
