Diffusion joint using silver layer of YBCO coated conductors for applications

Use of second generation coated conductors for efficient shielding of dc magnetic fields

“…[17][18][19][20] In Screen B the contact area is 4 ϫ 4 mm 2 so that a joint resistance ϳ100-300 n⍀ seems to be a reasonable estimate. A solenoid like Screen B ͑self-inductance L ϳ 1 H͒, "shortcircuited" by a superconducting tape with two 100 n⍀ joints, has a time constant ϳ 5 s. For a given sweep rate dB app / dt, the resistance of the joints will render magnetic shielding ineffective above a threshold induction B lim ϳ ͑dB app / dt͒, i.e., ϳ0.06 mT for a sweep rate of 12 T / s. Thus, the results of Fig.…”

Preparation of Epitaxial NbTi Thin Films at Room Temperature and Elemental Technologies for Superconducting Joint

“…近年、高温超電導線材は次世代高磁場 MRI 用のコイル 線材としての利用が期待され、超電導接続技術の研究開発 が活発になっている [1][2][3][4][5][6][7][8][9][10] 。我々は、線材とは異なる異種超 電導体薄膜を用いた Indirect 超電導接続 1) の開発を進めて おり、室温により近い温度での薄膜接続により線材の超電 導特性の劣化を回避する手法を提唱している [11][12][13] 。…”

Voltage Distribution and Mechanical Strength in Splice Joints Made From as-Manufactured Ybco Coated Conductors

“…This group then looked at the impact of stabilizer removal on splice joint resistance [3] and found that the resistance with a 60%Sn-40%Pb solder could be lowered to between 4.52 nΩ and 29 nΩ, depending on the technique used to remove the stabilizer. Others [4,5] have looked at methods to fabricate low-resistance splice joints on silver-coated YBCO tapes with no stabilizer and with thickness of silver between 1 µm and 5 µm and have produced similar resistances as reported in ref. 3.…”

“…3. Within the work in splice joint fabrication, only Sugano [4] considered the tensile properties of the joint in addition to its resistance and observed degradation in performance while tensile load was applied, which occurred at a value less than the tensile limit of the coated conductor.…”