Tailored joint fabrication process derived ultra-low resistance MgB2 superconducting joint
RIS ID
140244
Abstract
We report an ultra-low resistance superconducting joint using unreacted multifilament MgB2 wires produced by tailoring the powder compaction pressure within the joint with heat treatment conditions. The joint demonstrated an ultra-low resistance of 5.48 x 10−15 Ω and critical current (Ic) of 91.3 A at 20 K in self-field. The microstructural and composition studies of the joint revealed cracks and a high amount of MgO, respectively. These two features reduced the Ic of the joint to some extent; nevertheless, the joint resistance was not affected by it. Our tailored joining process will play a pivotal role in the superconducting joints development.
Publication Details
Patel, D., Matsumoto, A., Kumakura, H., Nishijima, G., Maeda, M., Kim, S., Choi, S. & Kim, J. (2020). Tailored joint fabrication process derived ultra-low resistance MgB2 superconducting joint. Scripta Materialia, 178 198-202.