Chromium and nitrogen segregation in thin oxide layers formed on the surface of 17Cr-Ni-Mo-N austenitic steels studied by angle resolved XPS

Shigeru Suzuki, Takanori Nakazawa, Yoshio Waseda

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Angle-resolved X-ray photoelectron spectroscopy (AR-XPS) has been used for characterizing thin oxide layers formed on the surface of 17Cr-Ni-Mo-N austenitic steels. It was confirmed that chromium and nitrogen segregation takes place on the surface by in-situ heating at 973 K under ultra high vacuum. The effective thickness and concentration of their segregated layer was estimated from the relationship between the concentration and the take-off angle in AR-XPS. AR-XPS study was also made for specimens without and with segregated surface layers which were subsequently exposed to air at room temperature. The surface segregation of chromium and nitrogen was found to considerably inhibit oxidation at room temperature, and such feature was rather distinct compared with the ferritic steel case by chromium segregation alone. These results on the surface layers were consistent with changes in the observed chemical state denoted by Fe2p and Cr2p due to the surface segregation.

Original languageEnglish
Pages (from-to)1273-1278
Number of pages6
JournalIsij International
Volume36
Issue number10
DOIs
Publication statusPublished - 1996 Jan 1

Keywords

  • Angle-resolved X-ray photoelectron spectroscopy
  • Austenitic steel
  • Initial oxidation
  • Stainless steel
  • Surface segregation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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