Title :
The Effect of Hot Isostatic Pressure on the Microstructure and Critical Current of Bi-2223/Ag Superconducting Tapes
Author :
Zhang, Z.W. ; Qu, T.M. ; Huang, K.-T. ; Gu, C. ; Song, X.-H. ; Zeng, P. ; Han, Z.
Author_Institution :
Dept. of Phys., Tsinghua Univ., Beijing, China
fDate :
6/1/2009 12:00:00 AM
Abstract :
Hot isostatic pressure (HIP) process has been carried out on multifilament Bi-2223/Ag tapes. The influence of the crack-healing process (CHP) on the microstructure and critical current (I c) of HIP samples has been studied. I c values of HIP samples show a strong depend on the CHP sintering temperature and dwelling time, with the optimum CHP condition at about 828degC for 3 hours. It was suggested that CHP is related to the presence of liquid phase, leading to a self-sealed effect in Bi-2223/Ag tapes. By controlling the CHP temperature, a preliminary I c improvement of about 14% has been achieved on HIP samples, compared to those sintered at normal pressure.
Keywords :
bismuth compounds; critical currents; crystal microstructure; high-temperature superconductors; lead compounds; multifilamentary superconductors; silver; sintering; superconducting tapes; (BiPb)2Sr2Ca2Cu3O10-Ag; crack-healing process; critical current; dwelling time; hot isostatic pressure process; microstructure; multifilament tapes; self-sealed effect; sintering temperature; temperature 828 C; time 3 hour; Bi-2223; crack-healing process; critical current; hot isostatic pressure;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2009.2019579
