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HIGH TRANSITION TEMPERATURE MULTIFILAMENTARY NIOBIUM-ALUMINIUM WIRES.

Author(s) : ABUKAY D., RINDERER L.

Type of article: Article

Summary

THE VALUES OF THE SUPERCONDUCTING TRANSITION TEMPERATURE, OF MULTIFILAMENTARY NIOBIUM-8 WT% ALUMINIUM WIRES FABRICATED BY POWDER METALLURGY WERE MEASURED AND FOUND TO BE IN THE RANGE 19.2-20.3 K. SAMPLES WERE HEATED FOR A SHORT TIME AT HIGHER THAN 2,273 K (2,000 DEG C) AND ANNEALED FOR 47-185 H AT 973-1,023 K (600-750 DEG C). THEIR UPPER CRITICAL FIELD WAS MEASURED RESISTIVELY. ON THESE CURVES, AN UPWARD CURVATURE BELOW 1 T NEAR TRANSITION TEMPERATURE IS OBSERVED. THE MEASURED HIGH VALUES OF TRANSITION TEMPERATURE ARE BELIEVED TO BE DUE TO A HIGH DEGREE OF ATOMIC ORDERING ATTAINED BY ANNEALING, RATHER THAN TO A STOICHIOMETRIC A 15 PHASE RESULTING FROM RAPID QUENCHING.

Details

  • Original title: HIGH TRANSITION TEMPERATURE MULTIFILAMENTARY NIOBIUM-ALUMINIUM WIRES.
  • Record ID : 1986-0478
  • Languages: English
  • Source: Cryogenics - vol. 25 - n. 8
  • Publication date: 1985

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