Ruqing Xu
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View article: Characterisation of irradiation damage in Fe–3Cr and Fe–5Cr: A study on the effects of chromium content and temperature
Characterisation of irradiation damage in Fe–3Cr and Fe–5Cr: A study on the effects of chromium content and temperature Open
Fe-Cr binary alloys serve as simplified model systems to study irradiation damage relevant to fusion structural materials. Here, Fe-3%Cr and Fe-5%Cr samples were irradiated with 4 MeV Fe ions under a dose rate of 4x10^5 dpa/s across a line…
View article: Stakes and Signals: An Empirical Investigation of Muddled Information in Standardized Testing
Stakes and Signals: An Empirical Investigation of Muddled Information in Standardized Testing Open
We examine a natural experiment in Brazil in which similar students took the same standardized test as either a low-stakes school accountability exam or a high-stakes admission exam for the country's top universities.Using administrative d…
View article: Origin of Rapid Delithiation In Secondary Particles Of LiNi<sub>0.8</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>O<sub>2</sub> and LiNi<sub><i>y</i></sub>Mn<sub><i>z</i></sub>Co<sub>1−<i>y</i>−<i>z</i></sub>O<sub>2</sub> Cathodes
Origin of Rapid Delithiation In Secondary Particles Of LiNi<sub>0.8</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>O<sub>2</sub> and LiNi<sub><i>y</i></sub>Mn<sub><i>z</i></sub>Co<sub>1−<i>y</i>−<i>z</i></sub>O<sub>2</sub> Cathodes Open
Most research on the electrochemical dynamics in materials for high‐energy Li‐ion batteries has focused on the global behavior of the electrode. This approach is susceptible to misleading analyses resulting from idiosyncratic kinetic condi…
View article: Origin of Rapid Delithiation In Secondary Particles Of LiNi0.8Co0.15Al0.05O2 and LiNiyMnzCo(1-y-z)O2 Cathodes
Origin of Rapid Delithiation In Secondary Particles Of LiNi0.8Co0.15Al0.05O2 and LiNiyMnzCo(1-y-z)O2 Cathodes Open
Most research on the electrochemical dynamics in materials for high-energy Li-ion batteries has focused on the global behavior of the electrode. This approach is susceptible to misleading analyses resulting from idiosyncratic kinetic condi…
View article: Ultra-thin freestanding graphene films for efficient thermal insulation and electromagnetic interference shielding
Ultra-thin freestanding graphene films for efficient thermal insulation and electromagnetic interference shielding Open
The preparation of freestanding graphene films by convenient and environmentally friendly preparation methods is still the focus of attention in various industrial fields.
View article: Mesoscale structural gradients in human tooth enamel
Mesoscale structural gradients in human tooth enamel Open
The outstanding mechanical and chemical properties of dental enamel emerge from its complex hierarchical architecture. An accurate, detailed multiscale model of the structure and composition of enamel is important for understanding lesion …
View article: Soft Phonons in (delta)-Phase Plutonium Near the (delta)-(alpha)' Transition
Soft Phonons in (delta)-Phase Plutonium Near the (delta)-(alpha)' Transition Open
Plutonium and its alloys exhibit complex phase diagrams that imply anomalous lattice dynamics near phase stability boundaries. Specifically, the TA [111] phonon branch in Ga-stabilized {delta}-Pu at room temperature shows a pronounced soft…
View article: Quantification of local dislocation density using 3D synchrotron monochromatic X-ray microdiffraction
Quantification of local dislocation density using 3D synchrotron monochromatic X-ray microdiffraction Open
A novel approach evolved from the classical Wilkens’ method has been developed to quantify the local dislocation density based on X-ray radial profiles obtained by 3D synchrotron monochromatic X-ray microdiffraction. A deformed Ni-based su…
View article: Residual strain–stress in manganese steel railway crossing determined by synchrotron and laboratory X-rays
Residual strain–stress in manganese steel railway crossing determined by synchrotron and laboratory X-rays Open
The residual stress within the nose of a worn manganese steel railway crossing was investigated. The macroscopic residual stress at the running surface was determined in areas with and without visual faults by laboratory X-rays. To get inf…
View article: Observation of Transient and Asymptotic Driven Structural States of Tungsten Exposed to Radiation
Observation of Transient and Asymptotic Driven Structural States of Tungsten Exposed to Radiation Open
Combining spatially resolved x-ray Laue diffraction with atomic-scale simulations, we observe how ion-irradiated tungsten undergoes a series of nonlinear structural transformations with increasing radiation exposure. Nanoscale defect-induc…
View article: Combining Laue diffraction with Bragg coherent diffraction imaging at 34-ID-C
Combining Laue diffraction with Bragg coherent diffraction imaging at 34-ID-C Open
Measurement modalities in Bragg coherent diffraction imaging (BCDI) rely on finding a signal from a single nanoscale crystal object which satisfies the Bragg condition among a large number of arbitrarily oriented nanocrystals. However, eve…
View article: Charging Reactions Promoted by Geometrically Necessary Dislocations in Battery Materials Revealed by In Situ Single‐Particle Synchrotron Measurements
Charging Reactions Promoted by Geometrically Necessary Dislocations in Battery Materials Revealed by In Situ Single‐Particle Synchrotron Measurements Open
Crystallographic defects exist in many redox active energy materials, e.g., battery and catalyst materials, which significantly alter their chemical properties for energy storage and conversion. However, there is lack of quantitative under…
View article: A method for mapping submicron-scale crystallographic order/disorder applied to human tooth enamel
A method for mapping submicron-scale crystallographic order/disorder applied to human tooth enamel Open
Tooth enamel, the outermost layer of human teeth, is a complex, hierarchically structured biocomposite. The details of this structure are important in multiple human health contexts, from understanding the progression of dental caries (too…
View article: Crystallography of low Z material at ultrahigh pressure: Case study on solid hydrogen
Crystallography of low Z material at ultrahigh pressure: Case study on solid hydrogen Open
Diamond anvil cell techniques have been improved to allow access to the multimegabar ultrahigh-pressure region for exploring novel phenomena in condensed matter. However, the only way to determine crystal structures of materials above 100 …
View article: Combining Laue diffraction with Bragg coherent diffraction imaging at\n 34-ID-C
Combining Laue diffraction with Bragg coherent diffraction imaging at\n 34-ID-C Open
Measurement modalities in Bragg coherent diffraction imaging (BCDI) rely on\nfinding signal from a single nanoscale crystal object, which satisfies the\nBragg condition among a large number of arbitrarily oriented nanocrystals.\nHowever, e…
View article: Alignment of sample position and rotation during <i>in situ</i> synchrotron X-ray micro-diffraction experiments using a Laue cross-correlation approach
Alignment of sample position and rotation during <i>in situ</i> synchrotron X-ray micro-diffraction experiments using a Laue cross-correlation approach Open
Laue micro-diffraction has proven to be able to reveal material properties at the sub-grain scale for many polycrystalline materials and is now routinely available at several synchrotron facilities, providing an approach for nondestructive…