Imaging individual solute atoms at crystalline imperfections in metals

Katnagallu S, Stephenson LT, Mouton I, Freysoldt C, Subramanyam APA, Jenke J, Ladines AN, Neumeier S, Hammerschmidt T, Drautz R, Neugebauer J, Vurpillot F, Raabe D, Gault B (2019)

Publication Type: Journal article

Publication year: 2019

Journal

New Journal of Physics Institute of Physics: Open Access Journals / Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft

Book Volume: 21

Journal Issue: 12

DOI: 10.1088/1367-2630/ab5cc4

Abstract

Directly imaging all atoms constituting a material and, maybe more importantly, crystalline defects that dictate materials' properties, remains a formidable challenge. Here, we propose a new approach to chemistry-sensitive field-ion microscopy (FIM) combining FIM with time-of-flight mass-spectrometry (tof-ms). Elemental identification and correlation to FIM images enabled by data mining of combined tof-ms delivers a truly analytical-FIM (A-FIM). Contrast variations due to different chemistries is also interpreted from density-functional theory (DFT). A-FIM has true atomic resolution and we demonstrate how the technique can reveal the presence of individual solute atoms at specific positions in the microstructure. The performance of this new technique is showcased in revealing individual Re atoms at crystalline defects formed in Ni-Re binary alloy during creep deformation. The atomistic details offered by A-FIM allowed us to directly compare our results with simulations, and to tackle a long-standing question of how Re extends lifetime of Ni-based superalloys in service at high-temperature.

Authors with CRIS profile

Steffen Neumeier Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

B03 (FP2): Einkristalline y'-gehärtete Co-Basis-Superlegierungen - Legierungsentwicklung, Gitterfehlpassung und mechanische Eigenschaften (SFB/TRR 103) SFB/TRR 103 Jan. 1, 2016 - Dec. 31, 2019

Involved external institutions

Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research DE Germany (DE) Université de Caen Basse-Normandie FR France (FR) Ruhr-Universität Bochum (RUB) DE Germany (DE)

How to cite

APA:

Katnagallu, S., Stephenson, L.T., Mouton, I., Freysoldt, C., Subramanyam, A.P.A., Jenke, J.,... Gault, B. (2019). Imaging individual solute atoms at crystalline imperfections in metals. New Journal of Physics, 21(12). https://dx.doi.org/10.1088/1367-2630/ab5cc4

MLA:

Katnagallu, Shyam, et al. "Imaging individual solute atoms at crystalline imperfections in metals." New Journal of Physics 21.12 (2019).

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