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2018-11-06
15:34
[PUBDB-2018-04216] Journal Article
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Tracking the Active Catalyst for Iron-Based Ammonia Decomposition by In Situ Synchrotron Diffraction Studies
ChemCatChem 10(19), 4465 - 4472 () [10.1002/cctc.201800398]  GO
Iron‐based catalysts for NH$_3$ decomposition have been studied by a combination of catalytic tests and in situ synchrotron diffraction experiments performed in an inert sapphire plug‐flow cell. In contrast to steel‐based reaction cells, sapphire or quartz glass cells show no blind activity [...]
ddc:540
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2018-11-06
15:26
[PUBDB-2018-04213] Journal Article
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Thermal behavior, structural relaxation and magnetic study of a new Hf-microalloyed Co-based glassy alloy with high thermal stability
In the present work, the influence of a minor Hf addition on the atomic structure, crystallization behavior, thermal stability and magnetic properties of a Co-based metallic glass was studied. Thermal analysis indicates that the thermal stability of new glassy ribbons microalloyed with 2.5 at.% Hf is notably enhanced through increasing the incubation time prior to devitrification and enlarging the width of the supercooled liquid region from 72 K to 96 K [...]
ddc:540
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2018-11-06
15:25
[PUBDB-2018-04212] Journal Article
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Structural evolution in a metallic glass pillar upon compression
The in-situ observation of structural evolution of a metallic glass pillar during deformation is carried out in a high energy synchrotron X-ray source. The changes of the first maximum in structure factor, S(q), reveal the evolution of atomic structure upon stress [...]
ddc:530
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2018-11-06
14:28
[PUBDB-2018-04199] Book/Report/Internal Report
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RRR degradation and gas absorption in the electron beam welding area of high purity niobium
[TESLA Report 2003-07]
TESLA Reports 13 pp. () [10.1063/1.1597366]  GO
Experiences concerning RRR degradation and gas absorption of high purity niobium welded at different electron beam (EB) facilities are summarized. The oxygen and nitrogen content is increased as a rule at the welding seam. [...]
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2018-11-02
12:11
[PUBDB-2018-04132] Journal Article
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Microstructure characterization in a single isotactic polypropylene spherulite by synchrotron microfocus wide angle X -ray scattering
Polymer 142, 387 - 393 () [10.1016/j.polymer.2018.03.061]  GO
Position-resolved microstructure in a single spherulite of iPP is quantitatively studied by synchrotron microfocus wide angle X-ray scattering. The results show that the normal of mother lamellae in a spherulite is aligned mainly perpendicular to the radius, and the subsidiary daughter lamellae are inclined 80.75° with respect to that of the dominant mother lamellae [...]
ddc:540
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2018-11-02
12:10
[PUBDB-2018-04131] Journal Article
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Critical Strains for Lamellae Deformation and Cavitation during Uniaxial Stretching of Annealed Isotactic Polypropylene
Macromolecules 51(16), 6276 - 6290 () [10.1021/acs.macromol.8b00642]  GO
The lamellae deformation and cavitation behavior of annealed isotactic polypropylene during uniaxial stretching are comprehensively investigated by in situ synchrotron small-angle X-ray scattering and wide-angle X-ray scattering. We reveal how lamellae deformation occurs in the time scales of elastic deformation, intralamellar slip, and melting–recrystallization, separated by three critical strains which are only rarely influenced by annealing [...]
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ddc:540
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2018-10-30
09:01
[PUBDB-2018-04012] Journal Article
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SLC30A10 Mutation Involved in Parkinsonism Results in Manganese Accumulation within Nanovesicles of the Golgi Apparatus
ACS chemical neuroscience in press, acschemneuro.8b00451 () [10.1021/acschemneuro.8b00451]  GO
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ddc:540
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2018-10-23
22:15
[PUBDB-2018-03898] Journal Article
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Unravelling the structural rearrangement of polymer colloidal crystals under dry sintering conditions
Soft matter 14(33), 6849 - 6856 () [10.1039/C8SM01412D]  GO
The structural rearrangement of polystyrene colloidal crystals under dry sintering conditions has been revealed by in situ grazing incidence X-ray scattering. The measured diffraction patterns were analysed using distorted wave Born approximation (DWBA) theory and the structural parameters of the as-grown colloidal crystals of three different particle sizes were determined for the in-plane and out-of-plane directions in a film [...]
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ddc:530
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2018-10-22
14:33
OpenAccess [PUBDB-2018-03875] Journal Article
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Pressure-induced modifications of the magnetic order in the spin-chain compound $\mathrm{Ca_{3}Co_{2}O_{6}}$
The structural and magnetic properties of the $\mathrm{Ca_{3}Co_{2}O_{6}}$ spin-chain compound have been studied by means ofneutron and x-ray powder diffraction at pressures up to 6.8 and 32 GPa, respectively. A suppression of the initialspin-density wave state $(T_{N} = 25 K)$ and stabilization of the collinear commensurate antiferromagnetic (AFM)state at high pressures $(T_{NC} = 26 K at P = 2.1$ GPa) were observed. [...]
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ddc:530
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2018-10-22
12:00
[PUBDB-2018-03868] Journal Article
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Probing chemical heterogeneity of Li-ion batteries by in operando high energy X-ray diffraction radiography
Uniformity of the crystal structure of battery electrodes inside a commercial prismatic Li-ion battery (LiCoO$_2$|C) with a nominal capacity of 1200 mAh were examined by diffraction of a monochromatic photon beam (60 keV). Selected structural parameters related to lithium concentrations in the positive and negative electrodes were determined averaging over cell thickness on a 1 × 1 mm$^2$ grid, thus resembling an experimental radiography technique with a pixel size of 1 mm$^2$, where the diffraction signal is used instead of attenuation of the photon beam [...]
ddc:620
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