Optimized superconducting MgB2 joint made by IMD technique
Yükleniyor...
Dosyalar
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IOP Publishing Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A novel type of superconducting joining technique has been introduced to join unreacted
internal Mg diffusion (IMD) single-core MgB2 wires. Our method is based on fabricating a
small diameter joint mould obtained by deforming an Nb/Cu composite tube with a longitudinal
semi-cylindrical Mg and B core into a thick round wire. The small diameter of the joint provided
advantages such as rapid cooling, low resistance, and the unique core design inside the joint
ensured a uniform MgB2 phase formation. Scanning electron microscope analysis revealed that
the IMD MgB2 wires had excellent contact with the superconducting MgB2 bulk material inside
the joint. The joint resistance, calculated from the decay of the trapped magnetic field over time,
is a quite low value of 6.44 × 10−16 Ω at 20 K. The transport critical current (Ic) of the joint is
62 A at 20 K under a self-magnetic field, and the n-value of the joint is 66 at 20 K under 1.5 T.
The results showed that the Ic of our joint can be determined precisely, regardless of whether the
magnetic field is applied from low to high or from high to low value during I–V measurements.
Açıklama
This work was funded by the Scientific and Technological Research Council of Turkey (TUBITAK) research project with Grant Number 119M288.
Anahtar Kelimeler
Superconductivity, MgB2 Wire, Joint, Internal Magnesium Diffusion
Kaynak
Superconductor Science and Technology
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
36
Sayı
7
Künye
Avcı, D., Yetiş, H., Gajda, D., Babij, M., Tran, L. M., Karaboğa, F., ... & Belenli, I. (2023). Optimized superconducting MgB2 joint made by IMD technique. Superconductor Science and Technology, 36(7), 075004.
