scholarly journals Intermixing of Fe and Cu on the atomic scale by high-pressure torsion as revealed by DC- and AC-SQUID susceptometry and atom probe tomography

2020 ◽  
Vol 196 ◽  
pp. 210-219 ◽  
Author(s):  
Martin Stückler ◽  
Heinz Krenn ◽  
Philipp Kürnsteiner ◽  
Baptiste Gault ◽  
Frédéric De Geuser ◽  
...  
Keyword(s):  
High Pressure ◽  
Atom Probe Tomography ◽  
High Pressure Torsion ◽  
Atom Probe ◽  
Atomic Scale

Atomic Scale Investigation of Impurity 3D Distribution in Nanocrystalline Ni Processed by SPD

2010 ◽  
Vol 667-669 ◽  
pp. 169-174 ◽  
Author(s):  
Xavier Sauvage ◽  
Gerhard Wilde ◽  
Ruslan Valiev
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Atom Probe Tomography ◽  
High Pressure Torsion ◽  
Atom Probe ◽  
Impurity Distribution ◽  
Atomic Scale ◽  
Reduction Mechanism ◽  
Transmission Electron ◽  
Influence Of Impurities

Some nanocrystaline Ni was prepared by repeated cold rolling with intermediate folding (F&R). The material was then processed by High Pressure Torsion (HPT) to study the grain evolution under additional Severe Plastic Deformation (SPD). Microstructures were characterized by Transmission Electron Microscopy (TEM) and the impurity distribution was analyzed by Atom Probe Tomography (APT). In this paper, we discuss about the influence of impurities on the grain growth during HPT and on the grain size reduction mechanism during SPD.

Intermixing of Fe and Cu on the Atomic Scale by High-Pressure Torsion as Revealed by Dc- and Ac-Squid Susceptometry

2020 ◽  
Author(s):  
Martin Stückler ◽  
Heinz Krenn ◽  
Lukas Weissitsch ◽  
Stefan Wurster ◽  
Reinhard Pippan ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Atomic Scale

scholarly journals Atomic Scale Analysis of Dopants in CMOS Structures by Atom Probe Tomography

2016 ◽  
Vol 22 (S3) ◽  
pp. 1534-1535
Author(s):  
Isabelle Martin ◽  
Robert Estivill ◽  
Marc Juhel ◽  
Adeline Grenier ◽  
Ty J. Prosa ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Atom Probe ◽  
Atomic Scale ◽  
Scale Analysis

Challenges Associated with the Characterisation of Nanocrystalline Materials Using Atom Probe Tomography

2010 ◽  
Vol 654-656 ◽  
pp. 2366-2369 ◽  
Author(s):  
Feng Zai Tang ◽  
Talukder Alam ◽  
Michael P. Moody ◽  
Baptiste Gault ◽  
Julie M. Cairney
Keyword(s):  
Quantitative Analysis ◽  
Atom Probe Tomography ◽  
Nanocrystalline Materials ◽  
Atom Probe ◽  
Atomic Scale ◽  
Three Dimensions ◽  
Specimen Preparation ◽  
Compositional Information

Atom probe tomography provides compositional information in three dimensions at the atomic scale, and is therefore extremely suited to the study of nanocrystalline materials. In this paper we present atom probe results from the investigation of nanocomposite TiSi¬Nx coatings and nanocrystalline Al. We address some of the major challenges associated with the study of nanocrystalline materials, including specimen preparation, visualisation, common artefacts in the data and approaches to quantitative analysis. We also discuss the potential for the technique to relate crystallographic information to the compositional maps.

3D-Atom Probe Investigation of Vacancy Induced Interdiffusion during High Pressure Torsion Deformation

2006 ◽  
Vol 503-504 ◽  
pp. 433-438 ◽  
Author(s):  
Xavier Sauvage
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Long Range ◽  
High Pressure Torsion ◽  
Pearlitic Steel ◽  
Atom Probe ◽  
Concentration Gradients ◽  
Deformed State ◽  
Torsion Deformation ◽  
Probe Investigation

Concentration gradients resulting from long range diffusion during Severe Plastic Deformation (SPD) have been investigated with the 3D Atom Probe technique (3D-AP). First, in a pearlitic steel where alloying elements (Mn, Si and Cr) are partitioned between the ferrite and carbides in the non-deformed state. After processing by High Pressure Torsion (HPT), they are homogeneously distributed in the nanostructure, indicating that long range diffusion occurred along with the dissolution of carbides. 3D-AP data of a Cu-Fe composite processed by HPT show as well a significant interdiffusion of Cu and Fe, probably promoted by additional vacancies. On the basis of these experimental data, and using the theory described for irradiated materials, vacancy fluxes and vacancy production rates were estimated assuming that new vacancies are continuously produced and eliminated on grain boundaries.

scholarly journals Atomic Scale Investigation of Orthopyroxene and Olivine Grain Boundaries by Atom Probe Tomography

2015 ◽  
Vol 21 (S3) ◽  
pp. 1315-1316 ◽  
Author(s):  
Mukesh Bachhav ◽  
Yan Dong ◽  
Philip Skemer ◽  
Emmanuelle A. Marquis
Keyword(s):  
Grain Boundaries ◽  
Atom Probe Tomography ◽  
Atom Probe ◽  
Atomic Scale

scholarly journals Interfaces and defect composition at the near-atomic scale through atom probe tomography investigations

2018 ◽  
Vol 33 (23) ◽  
pp. 4018-4030 ◽  
Author(s):  
Baptiste Gault ◽  
Andrew J. Breen ◽  
Yanhong Chang ◽  
Junyang He ◽  
Eric A. Jägle ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Atom Probe ◽  
Atomic Scale ◽  
Image Position

Abstract

scholarly journals A near atomic-scale view at the composition of amyloid-beta fibrils by atom probe tomography

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Kristiane A. K. Rusitzka ◽  
Leigh T. Stephenson ◽  
Agnieszka Szczepaniak ◽  
Lothar Gremer ◽  
Dierk Raabe ◽  
...  
Keyword(s):  
Amyloid Beta ◽  
Atom Probe Tomography ◽  
Atom Probe ◽  
Atomic Scale

scholarly journals Atom Probe Tomography for Catalysis Applications: A Review

2019 ◽  
Vol 9 (13) ◽  
pp. 2721 ◽  
Author(s):  
Cédric Barroo ◽  
Austin J. Akey ◽  
David C. Bell
Keyword(s):  
Sample Preparation ◽  
Atom Probe Tomography ◽  
Ion Beam ◽  
3D Structure ◽  
Atom Probe ◽  
Atomic Scale ◽  
High Mass ◽  
Preparation Methods ◽  
Catalytic Materials ◽  
Sample Preparation Methods

Atom probe tomography is a well-established analytical instrument for imaging the 3D structure and composition of materials with high mass resolution, sub-nanometer spatial resolution and ppm elemental sensitivity. Thanks to recent hardware developments in Atom Probe Tomography (APT), combined with progress on site-specific focused ion beam (FIB)-based sample preparation methods and improved data treatment software, complex materials can now be routinely investigated. From model samples to complex, usable porous structures, there is currently a growing interest in the analysis of catalytic materials. APT is able to probe the end state of atomic-scale processes, providing information needed to improve the synthesis of catalysts and to unravel structure/composition/reactivity relationships. This review focuses on the study of catalytic materials with increasing complexity (tip-sample, unsupported and supported nanoparticles, powders, self-supported catalysts and zeolites), as well as sample preparation methods developed to obtain suitable specimens for APT experiments.

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