DocumentCode
13877
Title
Transport Critical Current Density of 
Superconducting Tapes Processed by Flat Rolling and Uniax
Author
Chao Yao ; He Lin ; Xianping Zhang ; Chiheng Dong ; Dongliang Wang ; Qianjun Zhang ; Yanwei Ma ; Awaji, S. ; Watanabe, K.
Author_Institution
Key Lab. of Appl. Supercond., Inst. of Electr. Eng., Beijing, China
Volume
25
Issue
3
fYear
2015
fDate
Jun-15
Firstpage
1
Lastpage
4
Abstract
Ag-sheathed Sr0.6K0.4Fe2As2 superconducting tapes with various thicknesses were produced by flat rolling and cold uniaxial pressing based on an ex-situ powder-in-tube method. The transport critical current density (Jc) for both rolled and pressed tapes was found to increase with the decrease of tape thickness. Compared with flat rolling, cold pressing can further enhance the transport Jc of Sr0.6K0.4Fe2As2 tapes. A transport Jc as high as 4.8 × 104 A/cm2 at 4.2 K and 10 T was achieved by pressing Sr0.6K0.4Fe2As2 tapes at about 1.0 GPa. This superior transport Jc in the pressed tapes can be ascribed to improved mass density and grain texture of Sr0.6K0.4Fe2As2 superconducting cores.
Keywords
cold working; critical current density (superconductivity); high-temperature superconductors; iron compounds; pnictide superconductors; potassium compounds; pressing; rolling; silver; strontium compounds; superconducting tapes; Ag-sheathed superconducting tapes; Sr0.6K0.4Fe2As2-Ag; cold uniaxial pressing; flat rolling; grain texture; mass density; powder-in-tube method; pressed tape; rolled tape; superconducting cores; tape thickness; temperature 4.2 K; transport critical current density; Art; Critical current density (superconductivity); Pressing; Superconducting filaments and wires; Superconducting films; Wires; X-ray scattering; Critical current density; critical current density; iron-based superconductor; ironbased superconductor; pressing; rolling;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2014.2364741
Filename
6937118
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