ELECTRICAL CHARACTERISTICS OF FOUR TERNARY PLATINUM-RHODIUM-BASE ALLOYS CONTAINING CHROMIUM, COBALT, OR RUTHENIUM

Abstract

Resistivities of small specimens of 5Co-15Rh80Pt, 5Cr-15Rh-80Pt, 10Cr-15Rh-75Pt, and 5Ru15 Rh-80Pt were determined for temperatures up to 900 C. Resistance to progressive oxidation was observed in the Co- and Cr-containing alloys. The Co-containing alloy exhibited a shallow minimum of resistivity between about 200 and 400 C, but stability was not attained. The Cr-containing alloys exhibited very high and nearly constant rates of change of resistivity with temperature up to low-temperature reversible transformation points and were electrically stable at all temperatures. The Ru-containing alloy exhibited a linear and stable change of resistivity throughout its (lower) useful temperature range. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1961
Accession Number
AD0255531

Entities

People

  • Herman H. Lowell
  • Hubert W. Allen
  • Joe E. Jenkins

Organizations

  • National Aeronautics and Space Administration

Tags

DTIC Thesaurus Topics

  • Chromium
  • Corrosion Resistance
  • Elements
  • Low Temperature
  • Metals
  • Oxidation
  • Oxidation Resistance
  • Platinum
  • Resistance
  • Reversible
  • Ruthenium
  • Transition Metals

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.
  • Surface Engineering/Surface Coating Technology.