Oxidation behavior on the surface of titanium metal specimens at high temperatures (300~1000℃)

고온 (300~1000 ℃)에서 티타늄 금속시편의 표면 산화거동

  • Park, Yang-Soon (Korea Atomic Energy Research Institute) ;
  • Han, Sun-Ho (Korea Atomic Energy Research Institute) ;
  • Song, Kyuseok (Korea Atomic Energy Research Institute)
  • 박양순 (한국원자력연구원, 원자력화학연구부) ;
  • 한선호 (한국원자력연구원, 원자력화학연구부) ;
  • 송규석 (한국원자력연구원, 원자력화학연구부)
  • Received : 2009.09.18
  • Accepted : 2009.11.26
  • Published : 2009.12.25

Abstract

For the investigation of the oxidation behavior for titanium metal at various temperatures, titanium specimens were heated for 2 hours in the range of $300{\sim}1000^{\circ}C$, individually. And then X-ray diffraction(XRD), scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDS) and attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopic analyses were carried out. At $300^{\circ}C$, infrared absorption bands on the surface of the titanium specimen were shown in a spectrum by the oxygen uptake of titanium metal(hexagonal). At increased temperature, not only infrared absorption bands but also X-ray diffraction peaks for the titanium oxide were grown and shifted to low wave number ($cm^{-1}$) and angle($^{\circ}$) due to the more oxygen diffusion into titanium metal. At $700^{\circ}C$, $Ti_3O$ (hexagonal phase) was identified by X-ray diffractometer. $TiO_2$ (rutile, tetragonal phase) layer was produced on the surface of the specimen below $1{\mu}m$ in thickness at $600^{\circ}C$, and grown about $2{\mu}m$ at $700^{\circ}C$ and with $110{\mu}m$ in thickness at $1000^{\circ}C$. Above $900^{\circ}C$, (110) plane of the crystal on the surface of rutile-$TiO_2$ layer was grown.

Keywords

titanium;oxidation;x-ray diffraction;SEM/EDS;ATR-FTIR spectroscopy

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