Using Powder Diffraction Patterns to Calibrate the Module Geometry of a Pixel Detector

Wright, Jonathan P.; Giacobbe, Carlotta; Bright, Eleanor Lawrence

doi:10.3390/cryst12020255

Cited by 5 publications

(1 citation statement)

References 33 publications

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“…The 2D‐data was integrated using the azimuthal integrator implemented in pyFAI, [24] and the measurements were calibrated with LaB 6 (NIST Standard Reference Material 660c). Pixel corrections were done to correct for inaccuracies in experimental geometry according to the method outlined by Wright et al [25] . The peak shape was fitted to the aforementioned LaB 6 standard with the resolution function for area detectors by Chernyshov et al [26] .…”

Section: Methodsmentioning

confidence: 99%

Structural and magnetic properties of antifluorite‐type Li_5+xFe_1−xCo_xO₄

Thøgersen,

Fjellvåg,

Fjellvåg

et al. 2023

Zeitschrift anorg allge chemie

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We report on the structural and magnetic properties of Li5+xFe1‐xCoxO4 (0 ≤ x ≤ 1). The system assumes two distinct crystal structures at room temperature (α and β), and shows a transition in preference from α to β between x = 0.18 and x = 0.25. This tendency is supported by DFT‐calculations. Upon heating, Li5FeO4 undergoes a reconstructive transition from α → β at ∼1060 K, while Li6CoO4 shows an order‐disorder transition from β → ε at ∼885 K, where ε is a cubic cation‐disordered antifluorite structure. Li5.50Fe0.50Co0.50O4 is stabilised towards the ordered β‐phase until at least 1170 K. XANES‐measurements confirm that the oxidation states of Fe and Co remain unchanged throughout the series with charge compensation from additional Li+ on increasing x. Magnetic measurements show onset of low‐temperature antiferromagnetic ordering around 3 K to 12 K. The magnetic structure of Li5FeO4 is described on the basis of powder neutron diffraction at 1.5 K, while the magnetic structures of Li5.50Fe0.50Co0.50O4 and Li6CoO4 are found to be slightly incommensurate below the ordering temperature.

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Section: Methodsmentioning

confidence: 99%

Structural and magnetic properties of antifluorite‐type Li_5+xFe_1−xCo_xO₄

Thøgersen,

Fjellvåg,

Fjellvåg

et al. 2023

Zeitschrift anorg allge chemie

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Revealing per-grain and neighbourhood stress interactions of a deforming ferritic steel via three-dimensional X-ray diffraction

Ball,

Kareer,

Magdysyuk

et al. 2024

Commun Mater

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The structural performance of polycrystalline alloys is strongly controlled by the characteristics of individual grains and their interactions, motivating this study to understand the dynamic micromechanical response within the microstructure. Here, a high ductility single-phase ferritic steel during uniaxial deformation is explored using three-dimensional X-ray diffraction. Grains well aligned for dislocation slip are shown to possess a wide intergranular stress range, controlled by per-grain dependent hardening activity. Contrariwise, grains orientated poorly for slip have a narrow stress range. A grain neighbourhood effect is observed of statistical significance: the Schmid factor of serial adjoining grains influences the stress state of a grain of interest, whereas parallel neighbours are less influential. This phenomenon is strongest at low plastic strains, with the effect diminishing as grains rotate during plasticity to eliminate any orientation dependent load shedding. The ability of the ferrite to eliminate such neighbourhood interactions is considered key to the high ductility possessed by these materials.

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Implementing and evaluating far-field 3D X-ray diffraction at the I12 JEEP beamline, Diamond Light Source

D.¹,

Kareer²,

Michalik³

et al. 2022

J Synchrotron Radiat

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Three-dimensional X-ray diffraction (3DXRD) is shown to be feasible at the I12 Joint Engineering, Environmental and Processing (JEEP) beamline of Diamond Light Source. As a demonstration, a microstructually simple low-carbon ferritic steel was studied in a highly textured and annealed state. A processing pipeline suited to this beamline was created, using software already established in the 3DXRD user community, enabling grain centre-of-mass positions, orientations and strain tensor elements to be determined. Orientations, with texture measurements independently validated from electron backscatter diffraction (EBSD) data, possessed a ∼0.1° uncertainty, comparable with other 3DXRD instruments. The spatial resolution was limited by the far-field detector pixel size; the average of the grain centre of mass position errors was determined as ±∼80 µm. An average per-grain error of ∼1 × 10−3 for the elastic strains was also measured; this could be reduced in future experiments by improving sample preparation, geometry calibration, data collection and analysis techniques. Application of 3DXRD onto I12 shows great potential, where its implementation is highly desirable due to the flexible, open architecture of the beamline. User-owned or designed sample environments can be used, thus 3DXRD could be applied to previously unexplored scientific areas.

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Using Powder Diffraction Patterns to Calibrate the Module Geometry of a Pixel Detector

Cited by 5 publications

References 33 publications

Structural and magnetic properties of antifluorite‐type Li_5+xFe_1−xCo_xO₄

Structural and magnetic properties of antifluorite‐type Li_5+xFe_1−xCo_xO₄

Revealing per-grain and neighbourhood stress interactions of a deforming ferritic steel via three-dimensional X-ray diffraction

Implementing and evaluating far-field 3D X-ray diffraction at the I12 JEEP beamline, Diamond Light Source

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Using Powder Diffraction Patterns to Calibrate the Module Geometry of a Pixel Detector

Cited by 5 publications

References 33 publications

Structural and magnetic properties of antifluorite‐type Li5+xFe1−xCoxO4

Structural and magnetic properties of antifluorite‐type Li5+xFe1−xCoxO4

Revealing per-grain and neighbourhood stress interactions of a deforming ferritic steel via three-dimensional X-ray diffraction

Implementing and evaluating far-field 3D X-ray diffraction at the I12 JEEP beamline, Diamond Light Source

Contact Info

Product

Resources

About

Structural and magnetic properties of antifluorite‐type Li_5+xFe_1−xCo_xO₄

Structural and magnetic properties of antifluorite‐type Li_5+xFe_1−xCo_xO₄