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Calibration of Atom Probe Tomography Reconstructions Through Correlation with Electron Micrographs

  • Isabelle Mouton (a1), Shyam Katnagallu (a1), Surendra Kumar Makineni (a1), Oana Cojocaru-Mirédin (a2), Torsten Schwarz (a1), Leigh Thomas Stephenson (a1), Dierk Raabe (a1) and Baptiste Gault (a1)...

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.

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*Author for correspondence: I. Mouton, E-mail: isabelle.mouton42@gmail.com

References

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Keywords

Calibration of Atom Probe Tomography Reconstructions Through Correlation with Electron Micrographs

  • Isabelle Mouton (a1), Shyam Katnagallu (a1), Surendra Kumar Makineni (a1), Oana Cojocaru-Mirédin (a2), Torsten Schwarz (a1), Leigh Thomas Stephenson (a1), Dierk Raabe (a1) and Baptiste Gault (a1)...

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