TY - JOUR
T1 - 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
AU - Devaraj, Arun
AU - Barton, Dallin J.
AU - Li, Cheng-Han
AU - Lambeets, Sten V.
AU - Liu, Tingkun
AU - Battu, Anil
AU - Vaithiyalingam, Shutthanandan
AU - Thevuthasan, Suntharampillai
AU - Yang, Feipeng
AU - Guo, Jinghua
AU - Li, Tianyi
AU - Ren, Yang
AU - Kovarik, Libor
AU - Perea, Daniel E.
AU - Sushko, Maria L.
PY - 2022/7/12
Y1 - 2022/7/12
N2 - 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.
AB - 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.
KW - atom probe tomography
KW - diffusion
KW - material degradation
KW - oxidation
UR - http://www.scopus.com/inward/record.url?scp=85131671036&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85131671036&origin=recordpage
U2 - 10.1002/admi.202200134
DO - 10.1002/admi.202200134
M3 - RGC 21 - Publication in refereed journal
SN - 2196-7350
VL - 9
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 20
M1 - 2200134
ER -