DocumentCode :
1123401
Title :
The Effect of Filament Diameter on 
in High Filament Count Bi2212/Ag Round Wire
Author :
Nachtrab, William T. ; Wong, Terence ; Liu, Xiaotao T. ; Schwartz, Justin
Author_Institution :
Supercon, Inc., Shrewsbury, MA, USA
Volume :
19
Issue :
3
fYear :
2009
fDate :
6/1/2009 12:00:00 AM
Firstpage :
3061
Lastpage :
3066
Abstract :
In this study, we investigated the effect of filament size on Je for high filament count Bi2212 round wire conductors partial melt processed with Tmax between 882 and 890degC in pure oxygen. The filament size that produced maximum Je was between 12 and 15 mum depending on conductor design and Tmax. When the filament size was below 12 mum the filaments were unstable during partial melt processing leading to a break-up in the structure of the filament array and low Je. This effect is attributed the formation of interconnects between filaments which leads to coarsening driven by a reduction in interfacial surface energy.
Keywords :
bismuth compounds; calcium compounds; critical currents; high-temperature superconductors; melt processing; multifilamentary superconductors; silver; strontium compounds; surface energy; Bi2Sr2CaCu2O8-Ag; critical current; filament array structure; filament size effect; high-filament count round wire conductors; interfacial surface energy; partial melt processing; temperature 882 C to 890 C; Bi2212/Ag round wire; high-temperature superconductors; superconducting filaments and wires;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2009.2018213
Filename :
5153166
Link To Document :
