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The Effect of Hot Isostatic Pressure on the Microstructure and Critical Current of Bi-2223/Ag Superconducting Tapes

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7 Author(s)
Zhang, Z.W. ; Dept. of Phys., Tsinghua Univ., Beijing, China ; Qu, T. ; Huang, K.-T. ; Gu, C.
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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.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:19 ,  Issue: 3 )

Date of Publication:

June 2009

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