Study on the High Temperature Pressure Charging Procedure of Bi-2223/Ag Superconducting Tapes

Author

Qu, T.M. ; Gu, C. ; Huang, K.-T. ; Song, X.-H. ; Zeng, P. ; Han, Z.

Author_Institution

Dept. of Mech. Eng., Tsinghua Univ., Beijing, China

Volume

21

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

2832

Lastpage

2835

Abstract

Hermetically sealed samples are required for HIP experiments of Bi-2223/Ag tapes. Otherwise the high pressure gas might penetrate into the inner sample and balance the outside pressure. In this work, a new high temperature pressure charging (HTPC) procedure was proposed for the HIP process of Bi-2223/Ag tapes. Some liquid phase was firstly formed during the normal pressure heat treatment and the gas pressure was then applied directly at high temperature. Dense filaments could be achieved after this new HIP process. It was found the gas inflation temperature (T_add) and dwelling time before inflation (t_add) have some influence on the final microstructure morphology and critical current of HIP samples. A preliminary improvement of I_c of 13% was achieved after optimization, compared with that of normal pressure heat treated samples.

Keywords

bismuth compounds; critical currents; high-temperature superconductors; silver; superconducting tapes; Bi-2223-Ag superconducting tapes; Bi₂Sr₂Ca₂Cu₃O_10+x-Ag; HIP experiments; critical current; dense filaments; dwelling time; gas inflation temperature; high temperature pressure charging procedure; liquid phase; microstructure morphology; normal pressure heat treated samples; normal pressure heat treatment; Cogeneration; Critical current; Heat treatment; High temperature superconductors; Hip; Superconducting films; 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.2010.2091484

Filename

5643957