Improvements of fabrication processes and enhancement of critical current densities in (Ba,K)Fe2As2 HIP wires and tapes

Sunseng Pyon, Takahiro Suwa, Tsuyoshi Tamegai, Katsutoshi Takano, Hideki Kajitani, Norikiyo Koizumi, Satoshi Awaji, Nan Zhou, Zhixiang Shi

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

We fabricated (Ba,K)Fe2As2 superconducting wires and tapes using the powder-in-tube method and hot isostatic pressing (HIP). HIP wires and tapes showed a high value of transport critical current density (J c) exceeding 100 kAcm-2 at T = 4.2 K and the self-field. Transport J c in the HIP wire reached 38 kAcm-2 in a high magnetic field of 100 kOe. This value is almost twice larger than the previous highest value of J c among round wires using iron-based superconductors. Enhancement of J c in the wires and tapes was caused by improvement of the drawing process, which caused degradation of the core, formation of microcracks, weak links between grains, and random orientation of grains. Details of the effect of the improved fabrication processes on the J c are discussed.

Original languageEnglish
Article number055016
JournalSuperconductor Science and Technology
Volume31
Issue number5
DOIs
Publication statusPublished - 2018 Apr 13

Keywords

  • (Ba,K)FeAs
  • critical current density
  • hot isostatic pressing (HIP)
  • powder-intube (PIT)
  • superconducting wires and tapes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Improvements of fabrication processes and enhancement of critical current densities in (Ba,K)Fe<sub>2</sub>As<sub>2</sub> HIP wires and tapes'. Together they form a unique fingerprint.

Cite this