Optimization of heating profile for superconductor joint performance made by resistive joule heating process

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

The long-term heating (>60 min) of second generation high temperature superconductor (2G HTS) tape-joints at temperatures above 200 °C leads to the continuous deterioration of their superconducting properties. Previously, we proposed a resistive Joule heating process with a short heating time (∼10 min) that exhibited beneficial critical current (Ic), retention percentages (84–99 %), and joint resistances (74–697 nΩ cm2) in four independent experiments. In this study, we investigated two heating rates and three tape-joint areas. The results show that for the samples with different tape joint areas, the critical current retention percentages (97–100 %) and uniformity of specific joint resistances (82–272 nΩ cm2) were significantly improved at a high heating rate of ∼30 °C/min. The sintering of silver nanoparticles and oxidation characteristics of the copper stabilizers were observed using transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy to elucidate the effect of different heating profiles. This study opens new avenues for improving the quality of 2G HTS tape joint processes for ultrahigh magnetic field applications.

原文English
頁(從 - 到)1883-1890
頁數8
期刊Journal of Materials Research and Technology
28
DOIs
出版狀態Published - 2024 1月 1

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 生物材料
  • 表面、塗料和薄膜
  • 金屬和合金

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