X-Ray Absorption Spectroscopy to investigate precipitated oxides in Nb3Sn wires with an internal oxygen source

Internal oxidation can achieve significantly enhanced Jc in Nb 3 Sn wires, but the mechanism of oxygen transport and oxide precipitation is not fully understood. Our investigation employs X-ray Absorption Near-Edge Structure (XANES) spectroscopy, revealing insights into the oxidation of Zr and its interaction with oxygen in different areas of the wire cross section. We discovered that in samples reacted at 650 °C the majority of Zr in the Nb 3 Sn layer is oxidized as ZrO 2 , whereas it predominantly remains non-oxidized within the residual alloy. This is an interesting finding especially for samples where oxygen has to diffuse first through the entire layer of Nb alloy to reach the regions where Nb 3 Sn will form. The onset critical temperature ( Tc ) of the residual Nb alloy was the lowest in such samples, most probably due to a higher content of interstitial oxygen resulting from the diffusion gradient. This report adds to existing indications that ZrO 2 precipitates in superconductors employing internal oxidation are only located within the Nb 3 Sn layer and opens new avenues of research on the formation of this precipitates.

    Organizational unit
    Bovone - Nb3Sn
    Type
    Dataset
    DOI
    10.26037/yareta:6hw6dchjejaojd2djdbt3m4h6a
    Identical to the following DOI
    • 10.1109/TASC.2024.3354232
    License
    Creative Commons Attribution 4.0 International
Publication date23/02/2024
Retention date20/02/2034
accessLevelPublicAccess levelPublic
SensitivityBlue
licenseContract on the use of data
License
Contributors
  • Bovone, Gianmarco orcid
  • Buta, Florin
  • Lonardo, Francesco
  • Bonura, Marco
  • Borca, Camelia
  • Huthwelker, Thomas
  • Hopkins, Simon C.
  • Ballarino, Amalia
  • Boutboul, Thierry
1
0
  • Quality (0 Reviews)
  • Usefulness (0 Reviews)

Datacite metadata

Packages information

Similar archives

Bovone - Nb3Sn
Very high upper critical fields and enhanced critical current densities in Nb3Sn superconductors based on Nb–Ta–Zr alloys and internal oxidation
2022 accessLevelPublic Public 12.0 MB
Bovone - Nb3Sn
Influence of the Heat Treatment on the Layer JC of Internal-Sn Nb3Sn Wires With Internally Oxidized Nanoparticles
2024 accessLevelPublic Public 351.8 MB
Bovone - Nb3Sn
Effects of the oxygen source configuration on the superconducting properties of internally-oxidized internal-Sn Nb3Sn wires
2023 accessLevelPublic Public 13.6 MB
Bovone - Nb3Sn
2021-04-08 Machine learning applied to X-ray tomography as a new tool to analyze the voids in RRP Nb3Sn wires (Bagni)
2021 accessLevelPublic Public 9.3 MB
All rights reserved by DLCM and the University of GenevaunigeBlack