Enhancement of the critical current density in Cu/Ag composite sheathed (Ba, K)Fe2As2 tapes by pre-annealing process

Liu Li, Xianping Zhang, Chao Yao, Shifa Liu, He Huang, Chiheng Dong, Zhe Cheng, Satoshi Awaji, Yanwei Ma

Research output: Contribution to journalArticle

Abstract

Iron-based superconductors, a promising candidate for high-field applications, have aroused rising attentions. In the present study, a pre-annealing method was used to promote the transport critical current density (J c) in Cu/Ag composite sheathed (Ba,K)Fe2As2 tapes. It was found that tapes sintered at 740 °C for 3 h under ambient pressure showed a J c up to 4.9 × 104 A cm-2 (4.2 K, 10 T). Also, a transport J c of 6.5 × 104 A cm-2 (4.2 K, 10 T) was achieved using a hot-press technique. The factors affecting the J c of tapes were systematically analyzed. The well-constructed crystallization and grain connectivity obtained in pre-annealed tapes were considered as the major causes of the high J c. These results highlight the great potential to increase the J c in multiple metal composite sheathed Ba-122 tapes.

Original languageEnglish
Article number096003
JournalMaterials Research Express
Volume6
Issue number9
DOIs
Publication statusPublished - 2019 Jul 3

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

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