Perspective: From field-ion microscopy of single atoms to atom-probe tomography: A journey: “Atom-probe tomography” [Rev. Sci. Instrum. 78, 031101 (2007)]

Seidman, David N.

doi:10.1063/1.2716503

Cited by 25 publications

(16 citation statements)

References 51 publications

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“…Samples from the ingot were subjected to a three-stage heat-treatment: (1) homogenization at 1573 K in the -phase field for 20 h; (2) a vacancy anneal in the -phase field at 1123 K for 3 h followed by a water quench; and (3) an aging anneal at 873 K under flowing argon for times ranging from 0.25 to 4096 h, followed by a water quench. Pulsed-laser APT was performed with a 3-D LEAP tomograph [11,[15][16][17][18] at a target evaporation rate of 0.04 ions per pulse, a specimen temperature of 40.0 AE 0.3 K, a pulse energy of 0.6 nJ per pulse, a pulse repetition rate of 200 kHz and an ambient gauge pressure of less than 6.7 Â 10 À8 Pa. These evaporation conditions have been optimized to provide the highest compositional accuracy for this alloy [19].…”

Section: Methodsmentioning

confidence: 99%

On the nanometer scale phase separation of a low-supersaturation Ni–Al–Cr alloy

Booth-Morrison¹,

Zhou²,

Noebe³

et al. 2010

Philosophical Magazine

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The phase separation of a Ni-6.5 Al-9.5 Cr at. % alloy aged at 873 K was studied by atom-probe tomography and compared to the predictions of classical precipitation models. Phase separation in this alloy occurs in four distinct regimes: (i) quasi-stationary-state 0 (L1 2 )-precipitate nucleation; (ii) concomitant precipitate nucleation, growth and coagulation and coalescence; (iii) concurrent growth and coarsening, wherein coarsening occurs via both 0 -precipitate coagulation and coalescence and by the classical evaporation-condensation mechanism; and (iv) quasi-stationarystate coarsening of 0 -precipitates, once the equilibrium volume fraction of precipitates is achieved. The predictions of classical nucleation and growth models are not validated experimentally, likely due to the complexity of the atomistic kinetic pathways involved in precipitation. During coarsening, the temporal evolution of the 0 -precipitate average radius, number density and the (fcc)-matrix and 0 -precipitate supersaturations follow the predictions of classical models.

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Section: Methodsmentioning

confidence: 99%

On the nanometer scale phase separation of a low-supersaturation Ni–Al–Cr alloy

Booth-Morrison¹,

Zhou²,

Noebe³

et al. 2010

Philosophical Magazine

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“…Hence, in the present work we use a local electrode atom probe (LEAP) to study the redistribution of alloying elements especially, Cu, Fe and Si in an amorphous Fe 73.5 Si 15.5 Cu 1 Nb 3 B 7 alloy upon rapid (10 s) annealing over a range of temperatures. Atom probe tomography (APT) is a powerful technique that allows the detection and three dimensional visualization of precipitates, clusters, nanocrystals etc., in addition to determining their precise chemical composition [12][13][14]. We have utilized in this work, isoconcentration surface formation based on the given threshold limits of concentration values in order to visualize and represent typical nanostructures present in the experimental data along with their morphological characteristics.…”

Section: Introductionmentioning

confidence: 99%

Atomic scale study of CU clustering and pseudo-homogeneous Fe–Si nanocrystallization in soft magnetic FeSiNbB(CU) alloys

2015

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“…With the continued improvement in both instrument capability and sample preparation techniques~Bunton et al, 2007;Cerezo et al, 2007a;Kelly & Miller, 2007;Seidman, 2007aSeidman, , 2007bmization of data quality must be performed by fine-tuning the instrumentation parameters, specifically~1! Material-and specimendependent parameters, such as the evaporation behavior of the phases being studied and the crystallographic direction being examined, are also of critical importance and must be considered on a material-by-material basis.…”

Section: Introductionmentioning

confidence: 99%

On the Field Evaporation Behavior of a Model Ni-Al-Cr Superalloy Studied by Picosecond Pulsed-Laser Atom-Probe Tomography

2008

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The effects of varying the pulse energy of a picosecond laser used in the pulsed-laser atom-probe (PLAP) tomography of an as-quenched Ni-6.5 Al-9.5 Cr at.% alloy are assessed based on the quality of the mass spectra and the compositional accuracy of the technique. Compared to pulsed-voltage atom-probe tomography, PLAP tomography improves mass resolving power, decreases noise levels, and improves compositional accuracy. Experimental evidence suggests that Ni2+, Al2+, and Cr2+ ions are formed primarily by a thermally activated evaporation process, and not by post-ionization of the ions in the 1+ charge state. An analysis of the detected noise levels reveals that for properly chosen instrument parameters, there is no significant steady-state heating of the Ni-6.5 Al-9.5 Cr at.% tips during PLAP tomography.

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Perspective: From field-ion microscopy of single atoms to atom-probe tomography: A journey: “Atom-probe tomography” [Rev. Sci. Instrum. 78, 031101 (2007)]

Cited by 25 publications

References 51 publications

On the nanometer scale phase separation of a low-supersaturation Ni–Al–Cr alloy

On the nanometer scale phase separation of a low-supersaturation Ni–Al–Cr alloy

Atomic scale study of CU clustering and pseudo-homogeneous Fe–Si nanocrystallization in soft magnetic FeSiNbB(CU) alloys

On the Field Evaporation Behavior of a Model Ni-Al-Cr Superalloy Studied by Picosecond Pulsed-Laser Atom-Probe Tomography

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