Interstitial Atom Ordering in Binary Fe-N Solid Solutions Studied by Mössbauer Spectrometry

Abstract

A consistent survey of all the Mössbauer spectra of the γ′, α″, α′, and ϵ phases is given. The hyperfine parameters are discussed. The study of the spectra of ordered structures (γ′, α″, ϵ-FeN0.33) leads to the interpretation of the spectra corresponding to less well ordered phases (α′ and ϵ-FeN0.25). The role of the vibrational contribution to local energies is related to the observed N-atom redistributions.