Influence of nanovoids on alpha-alpha phase separation in FeCrAl oxide dispersion strengthened alloy Articles uri icon

publication date

  • January 2016

start page

  • 53

end page

  • 56


  • 110

International Standard Serial Number (ISSN)

  • 1359-6462

Electronic International Standard Serial Number (EISSN)

  • 1872-8456


  • The presence of nanovoids in the vicinity of oxide particles in FeCrAl oxide dispersion strengthened (ODS) alloy has been identified. These nanovoids are inherent to the manufacturing route and remain quite resistant during heat treatments. Positron annihilation spectroscopy (PAS) experiments demonstrate that these nanovoids trap Cr inside thereby reducing the Cr-content in the matrix. This might lead to a delay in the alpha-alpha' phase separation process as observed by atom probe tomography (APT).


  • Computer Science
  • Materials science and engineering
  • Physics


  • phase separation; ferrous alloy; tomography; positron annihilation spectroscopy; spinodal decomposition