Small-Angle X-ray Scattering Study of Nanocrystalline and Amorphous States of the Fe73.5CuNb3Si13.5B9 Alloy

1997 ◽  
Vol 30 (5) ◽  
pp. 633-636 ◽  
Author(s):  
D. R. dos Santos ◽  
I. L. Torriani ◽  
A. Y. Ramos ◽  
M. Knobel
Keyword(s):  
Small Angle ◽  
Melt Spinning ◽  
Structural Evolution ◽  
Atomic Diffusion ◽  
X Ray ◽  
X Ray Scattering ◽  
Nanocrystalline And Amorphous ◽  
Angle Scattering ◽  
Amorphous States ◽  
Ray Scattering

The structural evolution of the nanocrystalline material obtained from the amorphous compound Fe73.5CuNb3Si13.5B9 was investigated by small-angle X-ray scattering. Four sets of amorphous metallic ribbons were produced by melt spinning using different quenching rates. Samples of each set were annealed above the crystallization temperature; X-ray diffraction analysis showed the formation of an ordered Fe–Si solid solution with average grain sizes ranging from 9 to 11 nm. Small-angle scattering curves of the samples in the initial amorphous states revealed different intensities for different quenching rates, caused by the presence of heterogeneities with dimensions larger than those of the crystallites formed after thermal treatment. In addition, scattering measurements carried out in situ during isothermal annealing showed an intensity evolution as a function of time, attributed to electron-density contrast variation caused by the atomic diffusion process that occurs during crystallization.

Structural evolution of melt-drawn transparent high-density polyethylene during heating and annealing: Synchrotron small-angle X-ray scattering study

2010 ◽  
Vol 46 (9) ◽  
pp. 1866-1877 ◽  
Author(s):  
Zhiyong Jiang ◽  
Yujing Tang ◽  
Jens Rieger ◽  
Hans-Friedrich Enderle ◽  
Dieter Lilge ◽  
...  
Keyword(s):  
Small Angle ◽  
High Density Polyethylene ◽  
Structural Evolution ◽  
High Density ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering

scholarly journals Two practical Java software tools for small-angle X-ray scattering analysis of biomolecules

2014 ◽  
Vol 47 (2) ◽  
pp. 810-815 ◽  
Author(s):  
Andreas Hofmann ◽  
Andrew E. Whitten
Keyword(s):  
Small Angle ◽  
Three Dimensional ◽  
Small Angle Scattering ◽  
Ease Of Use ◽  
Scattering Data ◽  
X Ray ◽  
X Ray Scattering ◽  
Angle Scattering ◽  
Three Dimensional Models ◽  
Ray Scattering

Small-angle X-ray scattering has established itself as a common technique in structural biology research. Here, two novel Java applications to aid modelling of three-dimensional macromolecular structures based on small-angle scattering data are described.MolScatis an application that computes small-angle scattering intensities from user-provided three-dimensional models. The program can fit the theoretical scattering intensities to experimental X-ray scattering data.SAFIRis a program for interactive rigid-body modelling into low-resolution shapes restored from small-angle scattering data. The program has been designed with an emphasis on ease of use and intuitive handling. An embedded version ofMolScatis used to enable quick evaluation of the fit between the model and experimental scattering data.SAFIRalso provides options to refine macromolecular complexes with optional user-specified restraints against scattering data by means of a Monte Carlo approach.

Small-angle X-ray scattering by PVP–water mixtures

2001 ◽  
Vol 34 (1) ◽  
pp. 62-64 ◽  
Author(s):  
Jan van der Elsken ◽  
Wim Bras ◽  
Jan Michielsen
Keyword(s):  
Small Angle ◽  
Large Scale ◽  
Columnar Structure ◽  
Water Mixture ◽  
X Ray ◽  
Large Scale Structures ◽  
X Ray Scattering ◽  
Angle Scattering ◽  
Hexagonal Columnar ◽  
Ray Scattering

Small-angle X-ray scattering experiments reveal the formation of large-scale structures when a 60 wt% poly(vinylpyrrolidone) (PVP)–water mixture is cooled to 260 K. The formation of these structures leads to an enhancement of continuous small-angle scattering with decreasing temperature. This is accompanied by the appearance of sharp Bragg peaks that have a very short lifetime. The scattering angles of these peaks are in accordance with a hexagonal columnar structure. It appears that such structures occasionally live long enough to undergo rotational Brownian motion.

Structural Evolution of Aqueous Zirconium Acetate by Time-Resolved Small-Angle X-ray Scattering and Rheology

2015 ◽  
Vol 119 (22) ◽  
pp. 12660-12667 ◽  
Author(s):  
Martin Bremholm ◽  
Henrik Birkedal ◽  
Bo Brummerstedt Iversen ◽  
Jan Skov Pedersen
Keyword(s):  
Small Angle ◽  
Structural Evolution ◽  
Time Resolved ◽  
X Ray ◽  
Zirconium Acetate ◽  
X Ray Scattering ◽  
Ray Scattering

Small-angle energy-dispersive X-ray scattering using a laboratory-based diffractometer with a conventional source

2007 ◽  
Vol 40 (2) ◽  
pp. 218-231 ◽  
Author(s):  
Giuseppe Portale ◽  
Alessandro Longo ◽  
Lucio D'Ilario ◽  
Andrea Martinelli ◽  
Ruggero Caminiti ◽  
...  
Keyword(s):  
Small Angle ◽  
Energy Dispersive ◽  
Protein Solutions ◽  
X Rays ◽  
Catalytic Systems ◽  
X Ray ◽  
X Ray Scattering ◽  
Angle Scattering ◽  
Ray Patterns ◽  
Ray Scattering

The use of polychromaticBremsstrahlungX-rays generated by commercial tubes for energy-dispersive small-angle scattering measurements has not been extensively discussed in the literature, mainly because of some difficulties associated with it. If a suitable experimental setup is chosen and concomitant phenomena are taken into account for correcting the observed X-ray patterns, energy-dispersive small-angle X-ray scattering (SAXS) may become an interesting alternative to conventional measurements based on monochromatic beams. Energy-dispersive SAXS experiments carried out on protein solutions, micelles, semicrystalline polymers and catalytic systems are discussed to illustrate the new opportunities offered by this technique as well as its limitations.

First performance assessment of the small-angle X-ray scattering beamline at ELETTRA

1998 ◽  
Vol 5 (3) ◽  
pp. 506-508 ◽  
Author(s):  
H. Amenitsch ◽  
M. Rappolt ◽  
M. Kriechbaum ◽  
H. Mio ◽  
P. Laggner ◽  
...  
Keyword(s):  
Small Angle ◽  
Wide Angle ◽  
Fibrous Materials ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Angle Scattering ◽  
Scattering Measurements ◽  
Double Focusing ◽  
Ray Scattering

The double-focusing high-flux wiggler beamline dedicated to small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS) at ELETTRA has gone into user operation recently. It has been designed specifically for time-resolved studies of non-crystalline and fibrous materials in the submillisecond time scale, and has been optimized for small-angle scattering measurements. An overview of the beamline status and of some representative results, highlighting the performance of the SAXS beamline, are given.

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