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
- Physical and Computational Sciences Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99354 USA
- Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- Advanced Photon Source Argonne National Laboratory Lemont IL 60439 USA
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 Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
- Grant/Contract Number:
- DE‐AC02‐05CH11231; AC05-76RL01830; AC02-06CH11357; AC02-05CH11231
- OSTI ID:
- 1872124
- Alternate ID(s):
- OSTI ID: 1875724; OSTI ID: 1886054; OSTI ID: 1925197; OSTI ID: 2202270
- Report Number(s):
- PNNL-SA-169147; 2200134
- Journal Information:
- Advanced Materials Interfaces, Journal Name: Advanced Materials Interfaces Vol. 9 Journal Issue: 20; ISSN 2196-7350
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
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