TY - JOUR
T1 - Properties of seven-filament Cu/Ag-sheathed (Ba,K)Fe2As2 tapes fabricated from round and square wires
AU - Jin, Zhen Kun
AU - Liu, Cong
AU - Yao, Chao
AU - Li, Liu
AU - Huang, He
AU - Wang, Dong Liang
AU - Dong, Chi Heng
AU - Wang, Kai
AU - Zhang, Xian Ping
AU - Awaji, Satoshi
AU - Ma, Yan Wei
N1 - Funding Information:
This study was financially supported by the National Natural Science Foundation of China (Nos. U1832213, 51721005 and 51861135311), the National Key R&D Program of China (Nos. 2018YFA0704200 and 2017YFE0129500), the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (No. QYZDJ-SSW-JSC026) and the Strategic Priority Research Program of Chinese Academy of Sciences (No. XDB25000000).
Publisher Copyright:
© 2021, Youke Publishing Co.,Ltd.
PY - 2021/12
Y1 - 2021/12
N2 - Iron-based superconductor, a promising candidate for high-field applications, has attracted significant attentions. For practical utilization, the superconducting tapes should have high transport critical current density (Jc), low production cost, larger mechanical strength and good homogeneity. In this study, seven-filament Cu/Ag-sheathed (Ba,K)Fe2As2 tapes were fabricated from round and square wires. It is found that the tapes rolled from square wires have a desirable uniformity of filament deformation and distribution, compared with the ones rolled from round wires. Moreover, the Jc of tape was obviously improved by using square drawing dies instead of traditional round ones. For the tapes rolled from square wires annealed under ambient and 2 MPa by hot pressing, the transport Jc values reached 1.51 × 104A·cm−2 and 4.86 × 104 A·cm−2 (4.2 K, 10 T), respectively. The deformation process on the cross section of the tapes during rolling was analyzed by using the powder-flow model. These results indicate a potential application of Cu/Ag (Ba,K)Fe2As2 tapes in high-magnetic-field region. Graphical abstract: [Figure not available: see fulltext.]
AB - Iron-based superconductor, a promising candidate for high-field applications, has attracted significant attentions. For practical utilization, the superconducting tapes should have high transport critical current density (Jc), low production cost, larger mechanical strength and good homogeneity. In this study, seven-filament Cu/Ag-sheathed (Ba,K)Fe2As2 tapes were fabricated from round and square wires. It is found that the tapes rolled from square wires have a desirable uniformity of filament deformation and distribution, compared with the ones rolled from round wires. Moreover, the Jc of tape was obviously improved by using square drawing dies instead of traditional round ones. For the tapes rolled from square wires annealed under ambient and 2 MPa by hot pressing, the transport Jc values reached 1.51 × 104A·cm−2 and 4.86 × 104 A·cm−2 (4.2 K, 10 T), respectively. The deformation process on the cross section of the tapes during rolling was analyzed by using the powder-flow model. These results indicate a potential application of Cu/Ag (Ba,K)Fe2As2 tapes in high-magnetic-field region. Graphical abstract: [Figure not available: see fulltext.]
KW - Critical current density
KW - Cu/Ag sheath
KW - Iron-based superconductor
KW - Multi-filament tape
KW - Powder-flow model
KW - Square drawing dies
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U2 - 10.1007/s12598-021-01734-z
DO - 10.1007/s12598-021-01734-z
M3 - Article
AN - SCOPUS:85105539907
SN - 1001-0521
VL - 40
SP - 3651
EP - 3659
JO - Rare Metals
JF - Rare Metals
IS - 12
ER -