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Calibration of Atom Probe Tomography Reconstructions Through Correlation with Electron Micrographs

Published online by Cambridge University Press:  04 February 2019

Isabelle Mouton*
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
Shyam Katnagallu
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
Surendra Kumar Makineni
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
Oana Cojocaru-Mirédin
Affiliation:
RWTH Aachen, I. Physikalisches Institut IA, Sommerfeldstraße 14, 52074 Aachen, Germany
Torsten Schwarz
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
Leigh Thomas Stephenson
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
Dierk Raabe
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
Baptiste Gault
Affiliation:
Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
*
*Author for correspondence: I. Mouton, E-mail: [email protected]
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Abstract

Although atom probe tomography (APT) reconstructions do not directly influence the local elemental analysis, any structural inferences from APT volumes demand a reliable reconstruction of the point cloud. Accurate estimation of the reconstruction parameters is crucial to obtain reliable spatial scaling. In the current work, a new automated approach of calibrating atom probe reconstructions is developed using only one correlative projection electron microscopy (EM) image. We employed an algorithm that implements a 2D cross-correlation of microstructural features observed in both the APT reconstructions and the corresponding EM image. We apply this protocol to calibrate reconstructions in a Cu(In,Ga)Se2-based semiconductor and in a Co-based superalloy. This work enables us to couple chemical precision to structural information with relative ease.

Type
Reconstruction
Copyright
Copyright © Microscopy Society of America 2019 

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