In situ structural evolution of ion-irradiated R─Ba─Cu─O (R = Eu, Gd) superconductors

In situ synchrotron X-ray diffraction study of the synthesis of solid-electrolyte Li1+xAlxGe2−x(PO4)3 (LAGP) from the precursor glass reveals that an initially crystallized dopant poor phase transforms into the Al-doped LAGP at 800 °C.

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In-situ X-ray tomographic imaging study of gas and structural evolution in a commercial Li-ion pouch cell

Journal of Power Sources ◽

10.1016/j.jpowsour.2021.230818 ◽

2022 ◽

Vol 520 ◽

pp. 230818

Author(s):

Wenjia Du ◽

Rhodri E. Owen ◽

Anmol Jnawali ◽

Tobias P. Neville ◽

Francesco Iacoviello ◽

...

Keyword(s):

Structural Evolution ◽

Imaging Study ◽

Tomographic Imaging ◽

X Ray ◽

Li Ion

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Imaging the Polymorphic Transformation in a Single Cu6Sn5 Grain in a Solder Joint

Materials ◽

10.3390/ma11112229 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2229 ◽

Cited By ~ 3

Author(s):

Flora Somidin ◽

Hiroshi Maeno ◽

Xuan Tran ◽

Stuart D. McDonald ◽

Mohd Mohd Salleh ◽

...

Keyword(s):

Solder Joint ◽

Polymorphic Transformation ◽

Structural Evolution ◽

Real Space ◽

Transformation Behavior ◽

New Approach ◽

Transmission Electron ◽

Contrast Pattern ◽

In Situ Observations

In-situ observations of the polymorphic transformation in a single targeted Cu6Sn5 grain constrained between Sn-0.7 wt % Cu solder and Cu-Cu3Sn phases and the associated structural evolution during a solid-state thermal cycle were achieved via a high-voltage transmission electron microscope (HV-TEM) technique. Here, we show that the monoclinic η′-Cu6Sn5 superlattice reflections appear in the hexagonal η-Cu6Sn5 diffraction pattern upon cooling to isothermal 140 °C from 210 °C. The in-situ real space imaging shows that the η′-Cu6Sn5 contrast pattern is initiated at the grain boundary. This method demonstrates a new approach for further understanding the polymorphic transformation behavior on a real solder joint.

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Porous Silicon Structural Evolution from In-Situ Luminescence and Raman Measurements

MRS Proceedings ◽

10.1557/proc-431-171 ◽

1996 ◽

Vol 431 ◽

Author(s):

D. R. Tallant ◽

M. J. Kelly ◽

T. R. Guilinger ◽

R. L. Simpson

Keyword(s):

Porous Silicon ◽

Silicon Surface ◽

Structural Evolution ◽

Surface Oxidation ◽

Ethanol Solution ◽

Nonradiative Recombination ◽

Photoluminescence Intensity ◽

Exciton Migration ◽

Photoluminescence Mechanism

AbstractWe performed in-situ photoluminescence and Raman measurements on an anodized silicon surface in the HF/ethanol solution used for anodization. The porous silicon thereby produced, while resident in HF/ethanol, does not immediately exhibit intense photoluminescence. Intense photoluminescence develops spontaneously in HF/ethanol after 18–24 hours or with replacement of the HF/ethanol with water. These results support a quantum confinement mechanism in which exciton migration to traps and nonradiative recombination dominates the de-excitation pathways until silicon nanocrystals are physically separated and energetically decoupled by hydrofluoric acid etching or surface oxidation. The porous silicon surface, as produced by anodization, shows large differences in photoluminescence intensity and peak wavelength over millimeter distances. Parallel Raman measurements implicate nanometer-size silicon particles in the photoluminescence mechanism.

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Structural evolution of flow-oriented high density polyethylene upon heating: In situ SAXS and WAXD studies

Polymer ◽

10.1016/j.polymer.2019.121698 ◽

2019 ◽

Vol 180 ◽

pp. 121698 ◽

Cited By ~ 1

Author(s):

Tao Liao ◽

Xintong Zhao ◽

Xiao Yang ◽

Phil Coates ◽

Ben Whiteside ◽

...

Keyword(s):

High Density Polyethylene ◽

Structural Evolution ◽

High Density

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In Situ SEM Observation of Structured Si/C Anodes Reactions in an Ionic-Liquid-Based Lithium-Ion Battery

Applied Sciences ◽

10.3390/app9050956 ◽

2019 ◽

Vol 9 (5) ◽

pp. 956 ◽

Cited By ~ 4

Author(s):

Huifeng Shi ◽

Xianqiang Liu ◽

Rui Wu ◽

Yijing Zheng ◽

Yonghe Li ◽

...

Keyword(s):

Morphological Evolution ◽

Structural Evolution ◽

Lithium Ion ◽

Composite Electrodes ◽

Charge Capacity ◽

Shed Light ◽

3D Electrode ◽

Large Charge ◽

Scanning Electron

In situ scanning electron microscopy (SEM) offers a good way to investigate the structural evolution during lithiation and delithiation processes. In this paper, the dynamical morphological evolution of 3D-line-structured/unstructured Si/C composite electrodes was observed by in situ SEM. The investigation revealed the microstructural origin of large charge capacity for 3D-line-structured anodes. Based on this proposed mechanism, a coarse optimization of 3D-line-structured anodes was proposed. These results shed light on the unique advantages of using an in situ SEM technique when studying realistic bulk batteries and designing 3D electrode structures.

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Multi-Scale Digital Image Correlation Analysis of In Situ Deformation of Open-Cell UHMWPE Foam

10.20944/preprints202010.0254.v1 ◽

2020 ◽

Author(s):

Eugene S. Statnik ◽

Codrutza Dragu ◽

Cyril Besnard ◽

Alexander J.G. Lunt ◽

Alexey I. Salimon ◽

...

Keyword(s):

Digital Image Correlation ◽

Digital Image ◽

High Performance ◽

Structural Evolution ◽

Image Correlation ◽

Deformation Bands ◽

Open Cell ◽

Polyether Ether Ketone ◽

Structural Levels

Porous ultra-high molecular weight polyethylene (UHMWPE) is a high performance bioinert polymer used in cranio-facial reconstructive surgery in procedures where relatively low mechanical stresses arise. As an alternative to much stiffer and costly polyether-ether-ketone (PEEK) polymer, UHMWPE finds further wide application in hierarchically structured hybrids for advanced implants mimicking cartilage, cortical and trabecular bone tissues within a single component. The mechanical behaviour of open-cell UHMWPE sponges obtained through sacrificial desalination of hot compression-moulded UHMWPE-NaCl powder mixtures shows a complex dependence on the fabrication parameters and microstructural features. In particular, similarly to other porous media it displays significant inhomogeneity of strain that readily localises within deformation bands that govern the overall response. In this article, we report advances in the development of accurate experimental techniques for operando studies of the structure-performance relationship applied to the porous UHMWPE medium with pore sizes of about 250 µm that are most well-suited for live cell proliferation and fast vascularization of implants. Samples of UHMWPE sponges were subjected to in situ compression using a micromechanical testing device within Scanning Electron Microscope (SEM) chamber, allowing the acquisition of high-resolution image sequences for Digital Image Correlation (DIC) analysis. Special masking and image processing algorithms were developed and applied to reveal the evolution of pore size and aspect ratio. Key structural evolution and deformation localisation phenomena were identified at both macro- and micro-structural levels in the elastic and plastic regimes. The motion of pore walls was quantitatively described, and the presence and influence of strain localisation zones were revealed and analysed using DIC technique.

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Elucidating the Structural Evolution of a Highy Porous Responsive Metal-Organic Framework (DUT-49(M)) upon Guests Desorption by Time-Resolved In-Situ Powder X-Ray Diffraction

10.26434/chemrxiv.12753593.v1 ◽

2020 ◽

Author(s):

Bikash Garai ◽

Volodymyr Bon ◽

Francesco Walenszus ◽

Azat Khadiev ◽

Dmitri Novikov ◽

...

Keyword(s):

Adsorption Isotherms ◽

Metal Organic Framework ◽

Structural Evolution ◽

Structural Transformations ◽

X Ray Diffraction ◽

Time Resolved ◽

X Ray ◽

Metal Organic ◽

Subcritical Fluid

Variation in the metal centres of M-M paddle-wheel SBU results in the formation of isostructural DUT-49(M) frameworks. However, the porosity of the framework was found to be different for each of the structures. While a high and moderate porosity was obtained for DUT-49(Cu) and DUT-49(Ni), respectively, other members of the series [DUT-49(M); M= Mn, Fe, Co, Zn, Cd] show very low porosity and shapes of the adsorption isotherms which is not expected for op phases of these MOFs. Investigation on those MOFs revealed that those frameworks undergo structural collapse during the solvent removal at the activation step. Thus, herein, we aimed to study the detailed structural transformations that are possibly occurring during the removal of the subcritical fluid from the framework.

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