Studying nearest neighbor correlations by atom probe tomography (APT) in metallic glasses as exemplified for Fe40Ni40B20 glassy ribbons

2012 ◽  
Vol 512 (1) ◽  
pp. 270-277 ◽  
Author(s):  
Ahmed Shariq ◽  
Talaat Al-Kassab ◽  
Reiner Kirchheim
Keyword(s):  
Metallic Glasses ◽  
Atom Probe Tomography ◽  
Nearest Neighbor ◽  
Atom Probe

Clustering and Local Magnification Effects in Atom Probe Tomography: A Statistical Approach

2010 ◽  
Vol 16 (5) ◽  
pp. 643-648 ◽  
Author(s):  
Thomas Philippe ◽  
Maria Gruber ◽  
François Vurpillot ◽  
D. Blavette
Keyword(s):  
Experimental Data ◽  
Atom Probe Tomography ◽  
Statistical Approach ◽  
Nearest Neighbor ◽  
Three Dimensional ◽  
Atom Probe ◽  
Quantitative Composition ◽  
Second Phase ◽  
Real Experimental Data ◽  
Open Issues

AbstractLocal magnification effects and trajectory overlaps related to the presence of a second phase (clusters) are key problems and still open issues in the assessment of quantitative composition data in three-dimensional atom probe tomography (APT) particularly for tiny solute-enriched clusters. A model based on the distribution of distance of first nearest neighbor atoms has been developed to exhibit the variations in the apparent atomic density in reconstructed volumes and to correct compositions that are biased by local magnification effects. This model was applied to both simulated APT reconstructions and real experimental data and shows an excellent agreement with the expected composition of clusters.

Composition of Carbon Clusters in Implanted Silicon Using Atom Probe Tomography

2021 ◽  
pp. 1-4
Author(s):  
Paul Dumas ◽  
Sebastien Duguay ◽  
Julien Borrel ◽  
Fanny Hilario ◽  
Didier Blavette
Keyword(s):  
Electric Field ◽  
Atom Probe Tomography ◽  
Nearest Neighbor ◽  
Atom Probe ◽  
Molecular Ions ◽  
Carbon Clusters ◽  
Carbon Ions ◽  
Quantification Method ◽  
Nearest Neighbor Distances ◽  
Lower Electric Field

Atom probe tomography was employed to observe and derive the composition of carbon clusters in implanted silicon. This value, which is of interest to the microelectronic industry when considering ion implantation defects, was estimated not to exceed 2 at%. This measurement has been done by fitting the distribution of first nearest neighbor distances between monoatomic carbon ions (C+ and C2+). Carbon quantification has been considerably improved through the detection of molecular ions, using lower electric field conditions as well as equal proportions of 12C and 13C. In these conditions and using another quantification method, we have shown that the carbon content in clusters approaches 50 at%. This result very likely indicates that clusters are nuclei of the SiC phase.

Lattice Rectification in Atom Probe Tomography: Toward True Three-Dimensional Atomic Microscopy

2011 ◽  
Vol 17 (2) ◽  
pp. 226-239 ◽  
Author(s):  
Michael P. Moody ◽  
Baptiste Gault ◽  
Leigh T. Stephenson ◽  
Ross K.W. Marceau ◽  
Rebecca C. Powles ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Nearest Neighbor ◽  
Three Dimensional ◽  
Positional Information ◽  
Atom Probe ◽  
Pure Metal ◽  
Distribution Functions ◽  
Al Alloy ◽  
Significant Step ◽  
Species Specific

AbstractAtom probe tomography (APT) represents a significant step toward atomic resolution microscopy, analytically imaging individual atoms with highly accurate, though imperfect, chemical identity and three-dimensional (3D) positional information. Here, a technique to retrieve crystallographic information from raw APT data and restore the lattice-specific atomic configuration of the original specimen is presented. This lattice rectification technique has been applied to a pure metal, W, and then to the analysis of a multicomponent Al alloy. Significantly, the atoms are located to their true lattice sites not by an averaging, but by triangulation of each particular atom detected in the 3D atom-by-atom reconstruction. Lattice rectification of raw APT reconstruction provides unprecedented detail as to the fundamental solute hierarchy of the solid solution. Atomic clustering has been recognized as important in affecting alloy behavior, such as for the Al-1.1Cu-1.7Mg (at. %) investigated here, which exhibits a remarkable rapid hardening reaction during the early stages of aging, linked to clustering of solutes. The technique has enabled lattice-site and species-specific radial distribution functions, nearest-neighbor analyses, and short-range order parameters, and we demonstrate a characterization of solute-clustering with unmatched sensitivity and precision.

Clustered field evaporation of metallic glasses in atom probe tomography

2016 ◽  
Vol 162 ◽  
pp. 35-41 ◽  
Author(s):  
J. Zemp ◽  
S.S.A. Gerstl ◽  
J.F. Löffler ◽  
B. Schönfeld
Keyword(s):  
Metallic Glasses ◽  
Atom Probe Tomography ◽  
Atom Probe ◽  
Field Evaporation

scholarly journals Correlating nanoscale secondary ion mass spectrometry and atom probe tomography analysis of uranium enrichment in metallic nuclear fuel

The Analyst ◽  
2021 ◽  
Vol 146 (1) ◽  
pp. 69-74
Author(s):  
Elizabeth Kautz ◽  
John Cliff ◽  
Timothy Lach ◽  
Dallas Reilly ◽  
Arun Devaraj
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Fuel ◽  
Atom Probe Tomography ◽  
Secondary Ion Mass Spectrometry ◽  
Atom Probe ◽  
Uranium Enrichment ◽  
Length Scales ◽  
Atom Probe Tomography Analysis ◽  
Secondary Ion ◽  
Tomography Analysis

235U enrichment in a metallic nuclear fuel was measured via NanoSIMS and APT, allowing for a direct comparison of enrichment across length scales and resolutions.

scholarly journals Inside Front Cover: Atom Probe Tomography of Encapsulated Hydroxyapatite Nanoparticles (Small Methods 2/2021)

Small Methods ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 2170004
Author(s):  
Daniel S. Mosiman ◽  
Yi‐Sheng Chen ◽  
Limei Yang ◽  
Brian Hawkett ◽  
Simon P. Ringer ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Atom Probe ◽  
Hydroxyapatite Nanoparticles ◽  
Front Cover
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