High critical current density in Cu/Ag composited sheathed Ba0.6K0.4Fe2As2 tapes prepared via hot isostatic pressing. (1st March 2019)

• Record Type: Journal Article
• Authors: Liu, Shifa; Cheng, Zhe; Yao, Chao; Dong, Chiheng; Wang, Dongliang; Huang, He; Li, Liu; Xu, Guangxian; Zhu, Yanchang; Liu, Fang; Liu, Huajun; Ma, Yanwei
• Is Part Of: Superconductor science & technology. Volume 32:Number 4(2019:Apr.)
• Publication Date: 2019-03-01
• Subjects: iron-based superconducting tapes -- Cu/Ag composite sheath -- hot isostatic pressing -- low-cost fabrication; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/1361-6668/aaff27
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: Iron-based superconductors (IBSs) with ultrahigh upper critical fields and low anisotropies have attracted significant attention in terms of the novel mechanism of superconductivity and high-field applications. A major concern for practical research is the fabrication of long wires with enhanced critical current density and low cost. In this paper, Cu/Ag composited sheathed Ba0.6 K0.4 Fe2 As2 (Ba122) tapes were fabricated through a hot isostatic pressing method, which is feasible for long-wire manufacturing. The Cu/Ag composite sheath can lower the tape cost by reducing the use of expensive Ag. A high-transport critical current density ( J c ) up to 5.8 × 10 4 A cm −2 under 10 T at 4.2 K was achieved in our tapes. Evidence has shown that these tapes have pure Ba122 phase, homogeneous element distribution, orientated grains and good grain connectivity. Our work shows that low-cost Cu/Ag-sheathed IBS tapes have great promise for practical applications in the future.