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Investigation of the oxidation behavior of Mg-implanted steel samples

Abstract

Mg-implanted AISI 321 steel samples (implantation-energy 40 keV, dose: 2 * 1017 ions/cm2), were oxidized in air in the temperature region 350–650°C for several days. Nuclear Reaction Analysis (NRA) and Rutherford Backscattering Spectroscopy (RBS) were used to determine the oxygen concentration in the oxidized samples. An enhancement of the oxidation rate on the implanted material in comparison to the non-implanted was observed at high temperatures. It was demonstrated that the oxidation of Mg-implanted steel proceeds by two different mechanisms, at 350–550°C on the one hand and at 550–650°C on the other. The magnesium-depth distribution, determined by NRA (using the24Mg(α, P)27Al reaction), RBS and X-ray Photoelectron Spectroscopy (XPS) also indicated a diffusion of the element at high temperatures confirming these assumptions. Scanning Electron Microscopy (SEM) and Scanning Transmission Electron Microscopy (STEM) were applied to investigate the surface morphology and to explain the influence of Mg-ion implantation on the oxidation behavior of AISI 321 austenitic stainless steel.

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Noli, F., Misaelides, P., Giorginis, G. et al. Investigation of the oxidation behavior of Mg-implanted steel samples. Oxid Met 48, 225–241 (1997). https://doi.org/10.1007/BF01670501

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Key Words

  • ion-implantation
  • oxidation, thermal
  • steel, stainless
  • ion beam analysis
  • magnesium