Three-Dimensional Imaging of Phase Ordering in an Fe-Al Alloy by Bragg Ptychography

Kim, Chan; Chamard, Virginie; Hallmann, Jörg; Roth, Thomas; Lu, Wei; Boesenberg, Ulrike; Zozulya, Alexey; Leake, Steven; Madsen, Anders

doi:10.1103/physrevlett.121.256101

Cited by 12 publications

(6 citation statements)

References 36 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ptychography is an extension of CXDI introducing an additional overlap constraint in real space but is otherwise similar so the MH constraint can be used as discussed. The sample is highly strained but also contains antiphase domain boundaries (ADBs) with associated phase steps (Kim et al, 2018a). Near the ADBs, additional phase variations are expected due to lattice distortions and atomic rearrangements.…”

Section: Application Of Mh Constraint To Bragg Ptychographymentioning

confidence: 99%

“…A full 3D Bragg ptychography data set was taken on the (001) superlattice reflection with 001 = 17.55 , which is sensitive to both the ADBs and general lattice strain (Marcinkowski & Brown, 1962;Stadler et al, 2007). Further details about the Bragg ptychography experiment are given by Kim et al (2018a). A combination of two different methods, namely the ordered subset (OS) and conjugated gradient (CG) algorithms, was applied as the main CXDI phase retrieval algorithm in the ptychographic reconstruction (Godard et al, 2012) and the effect of the MH constraint was evaluated.…”

Section: Application Of Mh Constraint To Bragg Ptychographymentioning

confidence: 99%

“…X-ray crystallography can provide 3D images of molecules with atomic resolution although the results are derived from averaged information (Pandey et al, 2020;Gisriel et al, 2019). Unlike crystallography, by CXDI it is possible to visualize both non-crystalline and crystalline objects and derive quantitative information relevant for their properties, such as the electron density, thickness, atomic composition, lattice displacement, atomic ordering, and defect information, depending on the experimental scheme (Miao et al, 2003;Marathe et al, 2010;Kim et al, 2014Kim et al, , 2018aRobinson & Harder, 2009;Donnelly et al, 2017;Mastropietro et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography

Kim

Scholz

Madsen

2021

J Synchrotron Radiat

Self Cite

View full text Add to dashboard Cite

A quantitative analysis of the effect of strain on phase retrieval in Bragg coherent X-ray diffraction imaging is reported. It is shown in reconstruction simulations that the phase maps of objects with strong step-like phase changes are more precisely retrieved than the corresponding modulus values. The simulations suggest that the reconstruction precision for both phase and modulus can be improved by employing a modulus homogenization (MH) constraint. This approach was tested on experimental data from a highly strained Fe–Al crystal which also features antiphase domain boundaries yielding characteristic π phase shifts of the (001) superlattice reflection. The impact of MH is significant and this study outlines a successful method towards imaging of strong phase objects using the next generation of coherent X-ray sources, including X-ray free-electron lasers.

show abstract

Section: Application Of Mh Constraint To Bragg Ptychographymentioning

confidence: 99%

Section: Application Of Mh Constraint To Bragg Ptychographymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography

Kim

Scholz

Madsen

2021

J Synchrotron Radiat

Self Cite

View full text Add to dashboard Cite

show abstract

“…To date, BP with 3D spatial resolution of 10–50 nm, and strain resolution on the order of 10 −4 has been demonstrated 28 , 29 , and applied to complex problems in material science, e.g. anti-phase domain boundaries in a metallic alloy 30 , stacking faults and strain fields in semiconductor quantum wire 31 , 32 and crystalline domains in biominerals 33 . The advent of 4th generation synchrotrons, where BP will become available at several beamlines, should provide broader access to this microscopy method.…”

Section: Introductionmentioning

confidence: 99%

Revealing nano-scale lattice distortions in implanted material with 3D Bragg ptychography

Phillips

Leake

et al. 2021

Nat Commun

Self Cite

View full text Add to dashboard Cite

Small ion-irradiation-induced defects can dramatically alter material properties and speed up degradation. Unfortunately, most of the defects irradiation creates are below the visibility limit of state-of-the-art microscopy. As such, our understanding of their impact is largely based on simulations with major unknowns. Here we present an x-ray crystalline microscopy approach, able to image with high sensitivity, nano-scale 3D resolution and extended field of view, the lattice strains and tilts in crystalline materials. Using this enhanced Bragg ptychography tool, we study the damage helium-ion-irradiation produces in tungsten, revealing a series of crystalline details in the 3D sample. Our results lead to the conclusions that few-atom-large ‘invisible’ defects are likely isotropic in orientation and homogeneously distributed. A partially defect-denuded region is observed close to a grain boundary. These findings open up exciting perspectives for the modelling of irradiation damage and the detailed analysis of crystalline properties in complex materials.

show abstract

“…Here, we present a visualization of the phase boundaries inside the particles and the rounding effect of crystal facets of AuNi nanoparticles under laser irradiation by using coherent X-ray diffraction imaging (CXDI) (Ayyer et al, 2016;Ulvestad et al, 2015;Lo et al, 2018;Mastropietro et al, 2017;Donnelly et al, 2017;Kim et al, 2018). The pulsed laser annealing transforms phase-separated AuNi nanoparticles to metastable mixed AuNi alloy nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Laser-induced metastable mixed phase of AuNi nanoparticles: a coherent X-ray diffraction imaging study

Kim

Ahn

et al. 2020

J Synchrotron Radiat

Self Cite

View full text Add to dashboard Cite

The laser annealing process for AuNi nanoparticles has been visualized using coherent X-ray diffraction imaging (CXDI). AuNi bimetallic alloy nanoparticles, originally phase separated due to the miscibility gap, transform to metastable mixed alloy particles with rounded surface as they are irradiated by laser pulses. A three-dimensional CXDI shows that the internal part of the AuNi particles is in the mixed phase with preferred compositions at ∼29 at% of Au and ∼90 at% of Au.

show abstract

Three-Dimensional Imaging of Phase Ordering in an Fe-Al Alloy by Bragg Ptychography

Cited by 12 publications

References 36 publications

The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography

The influence of strain on image reconstruction in Bragg coherent X-ray diffraction imaging and ptychography

Revealing nano-scale lattice distortions in implanted material with 3D Bragg ptychography

Laser-induced metastable mixed phase of AuNi nanoparticles: a coherent X-ray diffraction imaging study

Contact Info

Product

Resources

About