Surface segregation of impurities on 304 SS and its effect on ion driven permeation of deuterium

  • Yamawaki M
  • Yamaguchi K
  • Kiyoshi T
 et al. 
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Abstract

The effect of surface composition on ion-driven permeation of deuterium through Type 304 stainless steel has been studied experimentally. The changes in the surface composition induced by ion implantation and thermal anneal of the specimen were determined by in-situ AES analysis. The experimental results revealed that the permeation rate was intimately correlated with the concentration of oxygen on the upstream-side surface; the permeation rate was large when the surface was rich in oxygen. Oxygen seems to form an oxide with silicon on the surface, and to inhibit the molecular recombination of deuterium, thereby increasing the permeation rate. © 1987.

Author-supplied keywords

  • Auger electron spectroscopy
  • Type 304 stainless steel in-situ
  • ion-driven hydrogen permeation
  • surface impurity segregation

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Authors

  • M. Yamawaki

  • K. Yamaguchi

  • T. Kiyoshi

  • T. Namba

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