A5059787100- Nuclear Materials and Properties
- Microstructure and mechanical properties
- Fusion materials and technologies
- High-pressure geophysics and materials
- Rare-earth and actinide compounds
- Microstructure and Mechanical Properties of Steels
- Advanced X-ray Imaging Techniques
- Electronic and Structural Properties of Oxides
- Ferroelectric and Piezoelectric Materials
- Magnetic and transport properties of perovskites and related materials
- X-ray Diffraction in Crystallography
- Electron and X-Ray Spectroscopy Techniques
- Electronic Packaging and Soldering Technologies
- Aluminum Alloy Microstructure Properties
- Ion-surface interactions and analysis
- 3D IC and TSV technologies
- Advanced Chemical Physics Studies
- Crystallography and Radiation Phenomena
- Advanced Electron Microscopy Techniques and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Metal and Thin Film Mechanics
- Nuclear Physics and Applications
- Copper Interconnects and Reliability
- Metal Alloys Wear and Properties
- Aluminum Alloys Composites Properties
Cornell University
2024
Middlebury College
2024
National Bureau of Economic Research
2024
Argonne National Laboratory
2014-2023
Institute of New Materials
2020-2023
Shanghai Maritime University
2020
University of Science and Technology of China
2019
Materials Design (France)
2015
University of Illinois Urbana-Champaign
2003-2014
Goodwin College
2008-2014
Deep learning achieves unprecedented success involves many fields, whereas the high requirement of memory and time efficiency tolerance have been intractable challenges for a long time. On other hand, quantum computing shows its superiorities in some computation problems owing to intrinsic properties superposition entanglement, which may provide new path settle these issues. In this paper, deep convolutional neural network (QDCNN) model based on parameterized circuit image recognition is...
Significance Diamond anvil cell (DAC) could be one of the most popular and versatile devices to generate static high pressure. By using beveled anvils, researchers can study materials up 4 Mbar, which is considered as a limit pressure conventional DAC; however, very few experiments have visited this region. Here, we systematically studied behaviors three DACs with typical culet sizes, reached Mbar. In addition, by submicrometer synchrotron X-ray probe, double cupping diamond anvils Mbar...
The interaction between dislocation pile-ups and grain boundaries gives rise to heterogeneous stress distributions when a structural metal is subjected mechanical loading. Such heterogeneity leads preferential sites for damage nucleation therefore intrinsically linked the strength ductility of polycrystalline metals. To date majority conclusions have been drawn from 2D experimental investigations at sample surface, allowing only incomplete observations. Our purpose here significantly advance...
We report an experimental determination of the phonon dispersion curves in a face-centered cubic (fcc) delta-plutonium-0.6 weight % gallium alloy. Several unusual features, including large elastic anisotropy, small-shear modulus C', Kohn-like anomaly T1[011] branch, and pronounced softening [111] transverse modes, are found. These features can be related to phase transitions plutonium strong coupling between lattice structure 5f valence instabilities. Our results also provide critical test...
The mineralogical constitution of the Earth’s mantle dictates geophysical and geochemical properties this region. Previous models a perovskite-dominant lower have been built on assumption that entire down to top D″ layer contains ferromagnesian silicate [(Mg,Fe)SiO 3 ] with nominally 10 mole percent Fe. On basis experiments in laser-heated diamond anvil cells, at pressures 95 101 gigapascals temperatures 2200 2400 kelvin, we found such perovskite is unstable; it loses its Fe...
Combining spatially resolved X-ray Laue diffraction with atomic-scale simulations, we observe how ion-irradiated tungsten undergoes a series of non-linear structural transformations increasing irradiation exposure. Nanoscale defect-induced deformations accumulating above 0.02 displacements per atom (dpa) lead to highly fluctuating strains at ~0.1 dpa, collapsing into driven quasi-steady state ~1 dpa. The asymptotic is characterized by finely dispersed vacancy defects coexisting an extended...
Many physical and chemical properties of the light rare-earths actinides are governed by active role f electrons, despite intensive efforts details mechanisms phase stability transformation not fully understood. A prominent example which has attracted a lot interest, both experimentally theoretically over years is isostructural γ - α transition in cerium. We have determined inelastic X-ray scattering, complete phonon dispersion scheme elemental cerium across → transition, compared it with...
Building on the success of Quantum Monte Carlo techniques such as diffusion Carlo, alternative stochastic approaches to solve electronic structure problems have emerged over past decade. The full configuration interaction quantum (FCIQMC) method allows one systematically approach exact solution problems, for cases where very high accuracy is desired. introduction FCIQMC has subsequently led development coupled cluster (CCMC) and density matrix (DMQMC), allowing sampling wave function thermal...
The intragranular strains and the microstructure within recrystallizing grains in single phase pure iron have been systematically studied 3D using synchrotron micro-diffraction. In contradiction to common knowledge we observe that residual elastic of up 1–2 × 10−3 are present grains. local strain variations individual can be similar magnitude those between different effects processing parameters, including rolling reduction, recrystallized volume fraction, cooling rate, as well...
The outstanding mechanical and chemical properties of dental enamel emerge from its complex hierarchical architecture. An accurate, detailed multiscale model the structure composition is important for understanding lesion formation in tooth decay (dental caries), development (amelogenesis) associated pathologies (e.g., amelogenesis imperfecta or molar hypomineralization), minimally invasive dentistry. Although features at length scales smaller than 100 nm (individual crystallites) greater 50...
In this paper, we report a new method for achieving depth resolved determination of the full stress tensor in buried Cu through-silicon vias (TSVs), using synchrotron-based X-ray microdiffraction technique. Two adjacent TSVs were analyzed; one capped with SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> (0.17 <inline-formula xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="TeX">\(\mu \) </tex-math></inline-formula> m)...
Strontium titanate is a low-temperature, non-Bardeen-Cooper-Schrieffer superconductor that superconducts to carrier concentrations lower than in any other system and exhibits avoided ferroelectricity at low temperatures. Neither the mechanism of superconductivity strontium nor importance structure dielectric properties for are well understood. We studied effects twin on 5.5-nm-thick layer niobium-doped SrTiO$_{3}$ embedded undoped SrTiO$_{3}$. used scanning superconducting quantum...
We developed a portable X-ray grating interferometer setup as standard tool for testing optics at the Advanced Photon Source (APS) beamline 1-BM. The can be operated in phase-stepping, Moiré, or single-grating harmonic imaging mode with 1-D 2-D gratings. All of motions are motorized; hence, it is much easier and quicker to switch between different modes operation. A novel aspect this new instrument its designed portability. While primarily used 1-BM, could potentially deployed other APS...
Abstract Crystallographic defects exist in many redox active energy materials, e.g., battery and catalyst which significantly alter their chemical properties for storage conversion. However, there is lack of quantitative understanding the interrelationship between crystallographic reactions. Herein, defects, such as geometrically necessary dislocations, are reported to influence reactions particles through single‐particle, multimodal, situ synchrotron measurements. Through Laue X‐ray...
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How boundaries surrounding recrystallization grains migrate through the 3D network of dislocation in deformed crystalline materials is unknown and critical for resulting recrystallized materials. Using X-ray Laue diffraction microscopy, we show first time migration pattern a typical boundary well-characterized deformation matrix. The data provide unique possibility to investigate effects both misorientation plane normal on migration, information which cannot be accessed with any other...