scholarly journals An in-situ method to estimate the tip temperature and phase selection of secondary Fe-rich intermetallics using synchrotron X-ray radiography

2018 ◽  
Vol 149 ◽  
pp. 44-48 ◽  
Author(s):  
S. Feng ◽  
E. Liotti ◽  
A. Lui ◽  
S. Kumar ◽  
A. Mahadevegowda ◽  
...  
Keyword(s):  
Phase Selection ◽  
X Ray ◽  
In Situ Method ◽  
Selection Of

scholarly journals Poly (N-Methyl Aniline)-Li Nanocomposite as an Electrolyte for Rechargeable Battery: In-situ Recipe

2020 ◽  
Vol 170 ◽  
pp. 01018
Author(s):  
Nishigandh Pande ◽  
Adinath Jambhale ◽  
Dipika Jaspal ◽  
Jalinder Ambekar ◽  
Himanshu Patil
Keyword(s):  
Cost Effective ◽  
Rechargeable Battery ◽  
Discharge Process ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
In Situ Method ◽  
Mechanism Of Interaction ◽  
Uv Visible

The synthesis of cost-effective and safe polymeric nanocomposite materials has been a subject of interest and study for material science researchers. Poly (N-Methyl Aniline) –Li nanocomposite has been synthesized by a one-pot in-situ method and has been explored as an electrolyte in the battery. Poly (N-Methyl Aniline)-Li nanocomposite prepared, has been characterized by UV-visible, FTIR, FE-SEM, X-ray diffraction techniques. A mechanism of interaction of lithiumion with nitrogen at the imine site has been proposed. The charge-discharge process of poly (N-Methyl Aniline) –Li nanocomposite, when used in the battery, has been discussed.

scholarly journals Spectral Decomposition of X-ray Absorption Spectroscopy Datasets: Methods and Applications

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 664 ◽  
Author(s):  
Andrea Martini ◽  
Elisa Borfecchia
Keyword(s):  
Absorption Spectroscopy ◽  
Multivariate Curve Resolution ◽  
Beam Position ◽  
X Ray ◽  
External Variables ◽  
Spectral Profiles ◽  
X Ray Absorption ◽  
Further Development ◽  
Selection Of

X-ray absorption spectroscopy (XAS) today represents a widespread and powerful technique, able to monitor complex systems under in situ and operando conditions, while external variables, such us sampling time, sample temperature or even beam position over the analysed sample, are varied. X-ray absorption spectroscopy is an element-selective but bulk-averaging technique. Each measured XAS spectrum can be seen as an average signal arising from all the absorber-containing species/configurations present in the sample under study. The acquired XAS data are thus represented by a spectroscopic mixture composed of superimposed spectral profiles associated to well-defined components, characterised by concentration values evolving in the course of the experiment. The decomposition of an experimental XAS dataset in a set of pure spectral and concentration values is a typical example of an inverse problem and it goes, usually, under the name of multivariate curve resolution (MCR). In the present work, we present an overview on the major techniques developed to realize the MCR decomposition together with a selection of related results, with an emphasis on applications in catalysis. Therein, we will highlight the great potential of these methods which are imposing as an essential tool for quantitative analysis of large XAS datasets as well as the directions for further development in synergy with the continuous instrumental progresses at synchrotron sources.

Microdiffraction Study of Polycrystalline Copper during Uniaxial Tension Deformation Using a Synchrotron X-Ray Source

2005 ◽  
Vol 475-479 ◽  
pp. 4149-4152
Author(s):  
H.D. Joo ◽  
J.S. Kim ◽  
C.W. Bark ◽  
J.Y. Kim ◽  
Yang Mo Koo ◽  
...  
Keyword(s):  
Uniaxial Tension ◽  
Light Source ◽  
In Situ Measurement ◽  
Uniaxial Loading ◽  
Polycrystalline Copper ◽  
Slip Systems ◽  
Local Orientation ◽  
X Ray ◽  
Selection Of

In-situ measurement of local orientation and strain Has Been carried out for a copperpolycrystals under a uniaxial loading using a synchrotron x-ray microdiffraction method at the Advanced Light Source. The heterogeneities of deformation-induced microstructure within single grains were observed. There were differences in the selection of simultaneously acting slip systems among neighboring volume elements within a grain.

scholarly journals In situ analysis of the nucleation of O- and Zn-polar ZnO nanowires using synchrotron-based X-ray diffraction

Nanoscale ◽  
2022 ◽  
Author(s):  
Valentina Cantelli ◽  
Sophie Guillemin ◽  
Eirini Sarigiannidou ◽  
Francesco Carla ◽  
Bruno Berini ◽  
...  
Keyword(s):  
Chemical Bath Deposition ◽  
Zno Nanowires ◽  
In Situ Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selection Of

The selection of the polarity of ZnO nanowires grown by chemical bath deposition offers a great advantage for their integration into a wide variety of engineering devices. However, the nucleation...

scholarly journals DIBUTYLTIN(IV) ALKYLCYCLOHEXYLDITHIOCARBAMATES: SPECTROSCOPIC CHARACTERIZATION AND CRYSTAL STRUCTURES OF DIBUTYLTIN(IV) N-METHYL AND N-ETHYLCYCLOHEXYLDITHIOCARBAMATE

2017 ◽  
Vol 25 (2) ◽  
pp. 419-426
Author(s):  
Normah Awang ◽  
Ibrahim Baba ◽  
Y. Farina Abd. Aziz ◽  
Bohari M. Yamin
Keyword(s):  
Crystal Structure ◽  
Nmr Spectroscopy ◽  
13C Nmr ◽  
13C Nmr Spectroscopy ◽  
Spectroscopic Characterization ◽  
Monoclinic System ◽  
Space Group ◽  
X Ray ◽  
In Situ Method

A new series of dibutyltin(IV) alkylcyclohexyldithiocarbamates of the type (C4H9)2Sn[S2CNR(C6H11)]2 (R = CH3, C2H5, i-C3H7) have been successfully synthesized using in-situ method. These compounds were characterized by elemental analysis, infrared and 13C NMR spectroscopy. A single crystal X-ray analysis of dibutyltin(IV) ethylcyclohexyldithiocarbamate, (C4H9)2Sn[S2CN(C2H5)(C6H11)]2 (compound 2) showed that the system of this crystal is triclinic with space group P-1 while dibutyltin(IV) methylcyclohexyldithiocarbamate, (C4H9)2Sn[S2CN(CH3)(C6H11)]2 (compound 1) has monoclinic system and it’s space group is P21/c. In the crystal structure of compound 2, the dithiocarbamate ligands are bidentically chelated to the tin atom with non-equivalent of the Sn-S distances: Sn(1)-S(1) = 2.9255(11) and Sn(1)-S(2) = 2.5419(10); Sn(1)-S(3) = 2.8922(9) and Sn(1)-S(4) = 2.5293(10) Å while in compound 1, the dithiocarbamate ligands were anisobidentically  chelated to the tin atom.       

scholarly journals Investigation of Microstructure Evolution and Phase Selection of Peritectic Cuce Alloy During High-Temperature Gradient Directional Solidification

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 911
Author(s):  
Yiku Xu ◽  
Zhaohao Huang ◽  
Yongnan Chen ◽  
Junxia Xiao ◽  
Jianmin Hao ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Primary Dendrite ◽  
Primary Phase ◽  
Withdrawal Rate ◽  
Compressive Property ◽  
Directionally Solidified ◽  
Phase Selection ◽  
Coupled Growth ◽  
Selection Of

In this work, a CuCe alloy was prepared using a directional solidification method at a series of withdrawal rates of 100, 25, 10, 8, and 5 μm/s. We found that the primary phase microstructure transforms from cellular crystals to cellular peritectic coupled growth and eventually, changes into dendrites as the withdrawal rate increases. The phase constituents in the directionally solidified samples were confirmed to be Cu2Ce, CuCe, and CuCe + Ce eutectics. The primary dendrite spacing was significantly refined with an increasing withdrawal rate, resulting in higher compressive strength and strain. Moreover, the cellular peritectic coupled growth at 10 μm/s further strengthened the alloy, with its compressive property reaching the maximum value of 266 MPa. Directional solidification was proven to be an impactful method to enhance the mechanical properties and produce well-aligned in situ composites in peritectic systems.

X-Ray Photoelectron Spectroscopic Studies of Valence States Produced by Ion-Sputtering Reduction

1972 ◽  
Vol 26 (3) ◽  
pp. 355-357 ◽  
Author(s):  
Lo I Yin ◽  
Subrata Ghose ◽  
Isidore Adler
Keyword(s):  
Spectroscopic Studies ◽  
Time Dependent ◽  
Potential Usefulness ◽  
Ion Sputtering ◽  
Spectroscopic Measurements ◽  
X Ray ◽  
In Situ Method ◽  
Valence States

X-ray photoelectron spectroscopic measurements of various valence states of Fe and Cu in several compounds using ion-sputtering reduction are presented, and the potential usefulness of this time-dependent and in situ method is discussed.

In Situ Observation of Solidification of Bulk Metallic Glass Forming Alloys from Supercooled Liquid by Using High Energy X-Ray Diffraction Combined with Levitation Techniques

2010 ◽  
Vol 638-642 ◽  
pp. 1677-1682 ◽  
Author(s):  
Masahito Watanabe ◽  
Akitoshi Mizuno ◽  
Toshihiko Akimoto ◽  
Shinji Kohara
Keyword(s):  
Liquid State ◽  
Supercooled Liquid ◽  
High Energy ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
Phase Selection ◽  
X Ray ◽  
Glass Forming ◽  
Supercooled Liquid State

It is well known that multi-component alloys form bulk metallic glasses (BMGs) from the supercooled liquid state without rapid quenching. However, the mechanism of phase selection between crystal and glass states has not been fully clarified. To obtain an insight into the glass-forming processes, we carried out in-situ observation on the solidification of Zr-based BMG-forming alloys from its supercooled liquids by time-resolved X-ray diffraction combined with the conical nozzle levitation (CNL) technique to achieve a containerless melting. For Zr-based alloys, we succeeded in detecting the X-ray diffraction patterns during glass formation from the supercooled liquid state as well as the crystallization from the liquid state. Furthermore we performed the precise structure analysis of supercooled state of Zr-based binary liquids. Based on the liquid structure and in-situ observation results, we discussed about the phase selection mechanism between crystal and glass states.

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

In Situ X-Ray Absorption Studies of the Electrochemical Reduction of Hydroxocobalamin

1997 ◽  
Vol 7 (C2) ◽  
pp. C2-619-C2-620 ◽  
Author(s):  
M. Giorgett ◽  
I. Ascone ◽  
M. Berrettoni ◽  
S. Zamponi ◽  
R. Marassi
Keyword(s):  
Electrochemical Reduction ◽  
X Ray ◽  
Absorption Studies ◽  
X Ray Absorption
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