APT User Meeting

Session

Applied Functional Materials

20 Nov 2024, 14:50

Room 203 (large seminar room) (Max-Planck-Institut für Eisenforschung GmbH)

4. Atom probe analysis of hexagonal Ge grown on GaAs nanowires

Mathias Krämer (Max Planck Institute for Sustainable Materials)

20/11/2024, 14:50

M. Krämer$^a$, I. Dudko$^{b,c}$, A.D. Lamirand$^b$, C. Botella$^b$, P. Regreny$^b$, A. Danescu$^b$, M. Bugnet$^d$, S. Walia$^c$, J. Penuelas$^b$, N. Chauvin$^b$ and B. Gault$^{a,e}$

(a) Max Planck Institute for Sustainable Materials, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
(b) Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, INL, UMR 5270,...

11. Effect of Ag nanoadditivation on microstructure formation in Nd-Fe-B magnets built by laser powder bed fusion

Varatharaja Nallathambi (Max Planck Institute for Sustainable Materials)

20/11/2024, 15:10

Additive manufacturing of Nd-Fe-B permanent magnets through laser powder bed fusion of metals (PBF-LB/M) provides opportunities for microstructural manipulation leading to novel combination of properties. Additivation of the feedstock powder with Ag nanoparticles (NPs) improves the coercivity of PBF-LB/M-produced Nd-Fe-B magnets by 17 ± 6% in as-built conditions (935 kA/m) compared to the...

22. Correlative STEM/APT analysis of antiferromagnetic thin films

Geri Topore (Imperial College London)

20/11/2024, 15:30

Multiferroic antiperovskite materials have shown considerable promise in recent years due to functionalities enabled by the coupling between their magnetic, mechanical, or electronic properties, leading to potential applications in sensors, transduers, spintronics, and novel memory devices. Understanding this coupling, and most importantly reliably controlling it with the application of...

17. Catalytic Efficiency of RuTi Thin Films and its Dependence on Microstructure and Chemistry

Beste Payam (Max-Planck-Institut für Eisenforschung GmbH)

20/11/2024, 16:10

Increasing environmental concerns have emphasized the significance of hydrogen and its production through sustainable routes. Hydrogen generation by water electrolysis has been considered an effective and environmentally friendly approach in which catalysis or electrocatalysis plays a vital role. Up to now, catalysts based on platinum group materials have dominated the market, with platinum...

26. Advancing Grain Boundary Research with Atom Probe Tomography: Unveiling Atomic-Scale Mechanisms in Ultrafine Nanomaterials

Xin Geng (Max Planck Institute for Sustainable Materials)

20/11/2024, 16:30

Grain boundaries (GBs) critically impact the mechanical, electrical, and catalytic properties of polycrystalline materials, making their investigation essential for material science progress. Atom probe tomography (APT) offers an advanced technique for atomic-scale analysis of GBs, generating three-dimensional compositional maps with sub-nanometer resolution. Using APT, we can directly observe...

21. Probing Dealloying Mechanisms in Thin-Film Nanoporous Metals Using Atom Probe Tomography

Ezgi Hatipoglu (Max-Planck-Institut für Nachhaltige Materialien GmbH)

20/11/2024, 16:50

Dealloying corrosion has become a popular method for obtaining highly functional nanoporous gold (NPG) substrates1. The selective dissolution of Ag from AgAu solid solutions in acidic environments leads to the formation of an open-pore, bicontinuous 3D, nanoporous structure. Using thin film precursors, as opposed to solid-solution alloys, facilitates easier integration of NPG into energy...