Fabrication Process and Pressure Dependence of Critical Current Density in Ba1-xKxFe2As2 Superconducting HIP Wires

Sunseng Pyon, Takahiro Suwa, Tsuyoshi Tamegai, Katsutoshi Takano, Hideki Kajitani, Norikiyo Koizumi, Satoshi Awaji

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

We demonstrate the fabrication of (Ba,K)Fe2As2 superconducting wires through a powder-in-tube (PIT) method and hot isostatic press (HIP) technique. Several fabrication processes with different sintering conditions of pressure and time were examined. The measurements of magnetization, I-V characteristics, filling factor, and Vickers hardness clarified that the improvement of fabrication process and sintering condition is effective for the enhancement of critical temperature T c, which leads to the enhancement of critical current density J c in HIP round wire. Wires which are fabricated in different processes show significantly different T c and J c. The core density, which can be enhanced by sintering at higher pressures, is the main key factor for enhancement of J c in HIP wires, similar to pressed tapes. Changing the sintering time also slightly affect J c.

Original languageEnglish
Article number012044
JournalJournal of Physics: Conference Series
Volume1054
Issue number1
DOIs
Publication statusPublished - 2018 Jul 26
Event30th International Symposium on Superconductivity, ISS 2017 - Tokyo, Japan
Duration: 2017 Dec 132017 Dec 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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