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

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

3045

Lastpage

3048

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 828^degC 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;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2019579

Filename

5152927