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.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2018 Jul 26|
|Event||30th International Symposium on Superconductivity, ISS 2017 - Tokyo, Japan|
Duration: 2017 Dec 13 → 2017 Dec 15
ASJC Scopus subject areas
- Physics and Astronomy(all)