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Journal of Materials Science

, Volume 30, Issue 13, pp 3429–3434 | Cite as

Fabrication of uniform Al-Pb-Bi monotectic alloys under microgravity utilizing the Space Shuttle: microstructure and superconducting properties

  • H. Fujii
  • T. Kimura
  • H. Kitaguchi
  • H. Kumakura
  • K. Togano
  • M. Mohri
Article

Abstract

Al-Pb-Bi monotectic alloys with three different compositions were melted and solidified under a microgravity environment in the Space Shuttle. The (Pb, Bi) particles were dispersed uniformly in the aluminium matrix, while evident sedimentation was observed in the reference sample processed under 1 G. Slow cooling was also effective to obtain homogeneous microstructure because of the absence of Marangoni force. The alloys were cold-worked into wires and the superconducting properties of the wires were investigated. The distance between (Pb, Bi) fibres for the alloys prepared under microgravity was so small that the wires showed complete zero resistance below 9 K due to the proximity effect.

Keywords

Polymer Aluminium Microstructure Sedimentation Material Processing 
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 1995

Authors and Affiliations

  • H. Fujii
    • 1
  • T. Kimura
    • 1
  • H. Kitaguchi
    • 1
  • H. Kumakura
    • 1
  • K. Togano
    • 1
  • M. Mohri
    • 2
  1. 1.National Research Institute for MetalsTsukuba-ShiJapan
  2. 2.National Space Development Agency of JapanTsukuba-ShiJapan

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