Depth resolved XRF and XAS for enrichment and oxidation of Mn on surface of annealed Fe-Mn alloys

K. Shinoda, S. Sato, S. Suzuki, H. Toyokawa, H. Tanida, M. Takagaki, Y. Terada, T. Uruga

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Alloying elements added to steel for improving surface properties such as corrosion resistance are often enriched to the surface of the alloys during annealing at high temperatures. Their behavior depends on difference in their chemical characters and the condition of annealing. In this study, nondestructive depth-resolved analysis of amount distribution and chemical state of alloying element by using X-ray fluorescence analysis (XRF) technique in combination with X-ray absorption spectroscopy (XAS) in order to characterize the enrichment and oxidation of manganese on the surface layers of an Fe-Mn alloy annealed under low oxygen partial pressure. The experiments were carried out using a two-dimensional detector with geometrical arrangement of grazing exit in detection of fluorescence X-ray emitted from sample surface. The results showed that manganese was enriched to surface layers of the Fe-Mn alloys during annealing at high temperatures and formed as manganese oxide. The preferential oxidation of manganese by annealing under low oxygen partial pressure is considered the driving force for their enrichment on the alloy surface.

Original languageEnglish
Title of host publicationDiffusion in Solids and Liquids V
PublisherTrans Tech Publications Ltd
Pages864-868
Number of pages5
Volume297-301
ISBN (Print)3908451809, 9783908451808
DOIs
Publication statusPublished - 2010

Keywords

  • Fluorescence-yield x-ray absorption spectrometry
  • Grazing exit detection
  • High-temperature oxidation
  • Synchrotron radiation

ASJC Scopus subject areas

  • Radiation
  • Materials Science(all)
  • Condensed Matter Physics

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