APPLICATION OF THE ″DIFFERENTIAL REFLECTOMETER″ TO MATERIALS RESEARCH IN CORROSION, ORDERING AND ALLOYING.

Academic Article

Abstract

  • A new instrument, called a differential reflectometer, which is capable of measuring small differences in optical reflectivity or transmissivity between two specimens, was applied to various metallurgical processes. Differential reflectograms were taken on Cu-An, Cu-Al, Cu-Ga, and Cu-Ni alloys with the aim of investigating these changes in band structure as a function of composition (compositional modulation). Corrosion studies were undertaken on a Cu-10Ni alloy. Two different oxides could be identified which were formed during immersion of the samples in an electrolyte while applying various potentials to them. Order-disorder reactions were investigated on Cu//3-Au. The experiments showed that the differential reflectometer can quickly identify whether one of two speciments is in the ordered state. A study on inhomogeneous alloys was carried out in which areas of different compositions could be detected.
  • Authors

    Author List

  • Hummel RE; Andrews JB; Holbrook JA
  • Start Page

  • 573
  • End Page

  • 577
  • Volume

  • 64
  • Issue

  • 8