Observation of Chemical State for Interstitial Solid Solution of Carbon in Low-carbon Steel by Soft X-ray Absorption Spectroscopy

Kakeru Ninomiya, Kazutaka Kamitani, Yusuke Tamenori, Kazuki Tsuruta, Toshihiro Okajima, Daisuke Yoshimura, Hideaki Sawada, Keisuke Kinoshita, Maiko Nishibori

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The near-edge X-ray absorption fine structure at the carbon K edge was measured for determining the chemical state of interstitial carbon in a low-carbon steel. In addition, the wavelength dependence of the photoelectron spectrum of the surface of the steel was evaluated, and a contamination and oxidation layer of 3 nm thickness was found. As a result, it was possible to observe a change in the chemical state of carbon existing in bulk iron located deeper than the oxidation and contamination layers, by evaluating the difference spectra between the sample and a reference. Furthermore, by evaluating the shape change of the difference spectra based on the heat treatment time, it was found that the chemical state of carbon in bulk iron changes with heat treatment.

Original languageEnglish
Pages (from-to)114-119
Number of pages6
JournalIsij International
Volume60
Issue number1
DOIs
Publication statusPublished - 2020
Externally publishedYes

Keywords

  • Aging
  • Chemical state analysis
  • Low-carbon steel
  • Photoelectron spectroscopy
  • X-ray absorption spectroscopy

ASJC Scopus subject areas

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

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