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Journal of Materials Science

, Volume 28, Issue 4, pp 942–948 | Cite as

Microstructural observation of Nb3Al multifilamentary superconducting wires

  • Akira Hasegawa
  • Takao Takeuchi
  • Kiyoshi Inoue
Papers
  • 43 Downloads

Abstract

A sample preparation technique is developed for the transversal observation of Nb tube processed multifilamentary wire. Microstructure characterization of the cross-section of Nb-25 at % (Al-2 at % Cu) wire has been carried out with analytical transmission electron microscopy. Intermetallic compound phases of A15, σ and NbAl3 are observed in a specimen heat-treated at 1023 K. Volume fraction changes of the individual phases indicate that σ and NbAl3 phases formed at the prior Al-core region in the early stage of the heat treatment, and thereafter A15 phase particles grew and coalesced with each other, consuming Nb and σ phase. A change in the volume fraction of A15 phase is correlated with superconducting properties.

Keywords

Intermetallic Compound Phase Particle Microstructure Characterization Analytical Transmission Electron Microscopy Microstructural Observation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • Akira Hasegawa
    • 1
  • Takao Takeuchi
    • 1
  • Kiyoshi Inoue
    • 1
  1. 1.Tsukuba LaboratoriesNational Research Institute for MetalsIbarakiJapan

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