Visualizing the Nanoscale Oxygen and Cation Transport Mechanisms during the Early Stages of Oxidation of Fe–Cr–Ni Alloy Using In Situ Atom Probe Tomography

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Arun Devaraj
  • Dallin J. Barton
  • Cheng-Han Li
  • Sten V. Lambeets
  • Tingkun Liu
  • Anil Battu
  • Shutthanandan Vaithiyalingam
  • Suntharampillai Thevuthasan
  • Feipeng Yang
  • Jinghua Guo
  • Tianyi Li
  • Libor Kovarik
  • Daniel E. Perea
  • Maria L. Sushko

Detail(s)

Original languageEnglish
Article number2200134
Journal / PublicationAdvanced Materials Interfaces
Volume9
Issue number20
Online published12 Jun 2022
Publication statusPublished - 12 Jul 2022
Externally publishedYes

Link(s)

Abstract

Understanding the early stages of interactions between oxygen and material surfaces—especially at very high spatial resolutions—is highly beneficial for fields ranging from materials degradation, corrosion, geological sciences, forensics, and catalysis. The ability of in situ atom probe tomography (APT) is demonstrated to track the diffusion of oxygen and metal ions at nanoscale spatial resolution during the early stages of oxidation of a model Fe–Cr–Ni alloy. Using 18O isotope tracers in these in situ APT experiments and complementary ex situ multimodal microscopy, spectroscopy, and computational simulations allows to precisely analyze the kinetics of oxidation and determine that outward cation diffusion to oxide/air interface is the primary mechanism for intragranular oxide growth in this alloy at 300 °C. This unique in situ isotopic tracer APT approach and the insights gained can be highly beneficial for studying early stages of gas–surface reactions in a broad array of materials.

Research Area(s)

  • atom probe tomography, diffusion, material degradation, oxidation

Citation Format(s)

Visualizing the Nanoscale Oxygen and Cation Transport Mechanisms during the Early Stages of Oxidation of Fe–Cr–Ni Alloy Using In Situ Atom Probe Tomography. / Devaraj, Arun; Barton, Dallin J.; Li, Cheng-Han et al.
In: Advanced Materials Interfaces, Vol. 9, No. 20, 2200134, 12.07.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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