The Use of Alloy 117 as a Liquid Metal Current Collector.

Abstract

Low melting point, bismuth based alloys are potential replacements for NaK78 as liquid metal slip ring material because of their lower reactivity and potentially greater hydrodynamic stability. This paper describes experiments with one such alloy in a model of a 300 kW superconducting homopolar motor using close clearance braid type collectors. Slip ring tip velocities varied from 5 to 20 m /s and currents ranging from 500 to 2000 A. Viscous power losses tend to follow a simple turbulent mode. In all, the data supports the use of low melting point alloys as an alternative to Na78.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1987
Accession Number
ADA185740

Entities

People

  • David Maribo
  • David W Taylor
  • Neal Sondergaard

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Accumulators
  • Classification
  • Clearances
  • Eddy Currents
  • Electrical Conductivity
  • Fluids
  • Liquid Metals
  • Liquids
  • Magnetic Fields
  • Materials
  • Materials Engineering
  • Mechanical Properties
  • Melting
  • Melting Point
  • Rings
  • Security
  • Slip Rings

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electrical Engineering
  • Materials Science and Engineering.