Atom probe tomography: Development and application to the geosciences

SM Reddy, DW Saxey, WDA Rickard… - Geostandards and …, 2020 - Wiley Online Library
Atom probe tomography (APT) is an analytical technique that provides quantitative three‐
dimensional elemental and isotopic analyses at sub‐nanometre resolution across the whole …

[HTML][HTML] Hierarchical nature of hydrogen-based direct reduction of iron oxides

Y Ma, IR Souza Filho, Y Bai, J Schenk, F Patisson… - Scripta Materialia, 2022 - Elsevier
Fossil-free ironmaking is indispensable for reducing massive anthropogenic CO 2 emissions
in the steel industry. Hydrogen-based direct reduction (HyDR) is among the most attractive …

Influence of microstructure and atomic-scale chemistry on the direct reduction of iron ore with hydrogen at 700 C

SH Kim, X Zhang, Y Ma, IR Souza Filho, K Schweinar… - Acta Materialia, 2021 - Elsevier
Steel is the most important material class in terms of volume and environmental impact.
While it is a sustainability enabler, for instance through lightweight design, magnetic …

Sustainable steel through hydrogen plasma reduction of iron ore: Process, kinetics, microstructure, chemistry

IR Souza Filho, Y Ma, M Kulse, D Ponge, B Gault… - Acta Materialia, 2021 - Elsevier
Iron-and steelmaking is the largest single industrial CO 2 emitter, accounting for 6.5% of all
CO 2 emissions on the planet. This fact challenges the current technologies to achieve …

Behavior of molecules and molecular ions near a field emitter

B Gault, DW Saxey, MW Ashton, SB Sinnott… - New Journal of …, 2016 - iopscience.iop.org
The cold emission of particles from surfaces under intense electric fields is a process which
underpins a variety of applications including atom probe tomography (APT), an analytical …

On the current role of atom probe tomography in materials characterization and materials science

EA Marquis, M Bachhav, Y Chen, Y Dong… - Current Opinion in Solid …, 2013 - Elsevier
Atom probe tomography has without any doubt become a routine technique to analyze the
detailed three-dimensional chemistry of materials at the nanoscale. This article provides a …

Composition of wide bandgap semiconductor materials and nanostructures measured by atom probe tomography and its dependence on the surface electric field

L Mancini, N Amirifar, D Shinde, I Blum… - The Journal of …, 2014 - ACS Publications
Atom probe tomography allows for three-dimensional reconstruction of the elemental
distribution in materials at the nanoscale. However, the measurement of the chemical …

Role of photoexcitation and field ionization in the measurement of accurate oxide stoichiometry by laser-assisted atom probe tomography

A Devaraj, R Colby, WP Hess, DE Perea… - The journal of …, 2013 - ACS Publications
The addition of pulsed lasers to atom probe tomography (APT) extends its high spatial and
mass resolution capability to nonconducting materials, such as oxides. For a prototypical …

Visualizing the iron atom exchange front in the Fe (II)-catalyzed recrystallization of goethite by atom probe tomography

SD Taylor, J Liu, X Zhang, BW Arey… - Proceedings of the …, 2019 - National Acad Sciences
The autocatalytic redox interaction between aqueous Fe (II) and Fe (III)-(oxyhydr) oxide
minerals such as goethite and hematite leads to rapid recrystallization marked, in principle …

Quantitative mapping of chemical defects at charged grain boundaries in a ferroelectric oxide

KA Hunnestad, J Schultheiß, AC Mathisen… - Advanced …, 2023 - Wiley Online Library
Polar discontinuities, as well as compositional and structural changes at oxide interfaces
can give rise to a large variety of electronic and ionic phenomena. In contrast to earlier work …