THE STRUCTURAL CHANGES INVESTIGATION INDUCED BY SOLID METALS-LIQUID METAL INTERACTION WITH THE HELP OF THE DIFFRACTION OF SYNCHROTRON RADIATION

2016 ◽  
Keyword(s):  
Synchrotron Radiation ◽  
Liquid Metal ◽  
Structural Changes ◽  
Metal Interaction

In Situ Measurement of the Phase Transformation Behavior of Al2O3 Scale during High-Temperature Oxidation using Synchrotron Radiation

2011 ◽  
Vol 696 ◽  
pp. 63-69 ◽  
Author(s):  
Shigenari Hayashi ◽  
Isao Saeki ◽  
Yoshitaka Nishiyama ◽  
Takashi Doi ◽  
Shoji Kyo ◽  
...  
Keyword(s):  
High Temperature ◽  
Synchrotron Radiation ◽  
High Temperature Oxidation ◽  
Structural Changes ◽  
Lattice Parameter ◽  
Transformation Behavior ◽  
Initial Oxidation ◽  
Temperature Oxidation ◽  
Diffraction Peaks

Very thin Fe-coatings, ~50nm, were found to suppress metastable Al2O3 formation on Fe-50Al and Ni-50Al alloys in our previous study. The authors proposed a mechanism whereby α-Al2O3 precipitates from the Al-saturated Fe2O3, which was formed during initial oxidation, since α-Al2O3 and α-Fe2O3 have isomorphous structures. In order to confirm the proposed mechanism, in-situ measurements were made of structural changes in the oxide scales formed on FeAl with and without Fe coating during heating and subsequent isothermal high temperature oxidation by synchrotron radiation with a two-dimensional X-ray detector. Diffraction peaks from Fe2O3 were initially observed at around 350°C on Fe-coated samples. The lattice parameter of the Fe2O3 initially increased linearly due to thermal expansion, but then rapidly decreased due to the formation of a solid solution of Fe2O3-Al2O3. α-Al2O3 started to appear at around 800°C, but no peaks from metastable Al2O3 were observed. The diffraction peaks from the α-Al2O3 on Fe-coated samples consisted of two distinct peaks, indicating that the α-Al2O3 had two different lattice parameters. These results suggest that the α-Al2O3 was formed not only by precipitation from the Al-saturated Fe2O3, but also by oxidation of Al in the substrate.

Investigation of the structural changes in Li1−xFePO4 upon charging by synchrotron radiation techniques

2011 ◽  
Vol 21 (30) ◽  
pp. 11406 ◽  
Author(s):  
Xiao-Jian Wang ◽  
Cherno Jaye ◽  
Kyung-Wan Nam ◽  
Bin Zhang ◽  
Hai-Yan Chen ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Structural Changes ◽  
Synchrotron Radiation Techniques

scholarly journals Visualization of 3D Network of Grain Boundary Applied Liquid Metal Wetting Method by High-resolution Synchrotron Radiation CT

Materia Japan ◽  
2005 ◽  
Vol 44 (12) ◽  
pp. 959-959
Author(s):  
Masakazu Kobayashi ◽  
Kentaro Uesugi ◽  
Tomomi Ohgaki ◽  
Toshiro Kobayashi ◽  
Hiroyuki Toda
Keyword(s):  
High Resolution ◽  
Synchrotron Radiation ◽  
Liquid Metal ◽  
Grain Boundary ◽  
3D Network ◽  
Wetting Method

scholarly journals High-viscosity injector-based pink-beam serial crystallography of microcrystals at a synchrotron radiation source

IUCrJ ◽  
2019 ◽  
Vol 6 (3) ◽  
pp. 412-425 ◽  
Author(s):  
Jose M. Martin-Garcia ◽  
Lan Zhu ◽  
Derek Mendez ◽  
Ming-Yue Lee ◽  
Eugene Chun ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Radiation Source ◽  
Structural Changes ◽  
High Viscosity ◽  
Synchrotron Radiation Source ◽  
Proteinase K ◽  
Moderate Increase ◽  
Time Resolved ◽  
X Ray ◽  
Serial Crystallography

Since the first successful serial crystallography (SX) experiment at a synchrotron radiation source, the popularity of this approach has continued to grow showing that third-generation synchrotrons can be viable alternatives to scarce X-ray free-electron laser sources. Synchrotron radiation flux may be increased ∼100 times by a moderate increase in the bandwidth (`pink beam' conditions) at some cost to data analysis complexity. Here, we report the first high-viscosity injector-based pink-beam SX experiments. The structures of proteinase K (PK) and A2A adenosine receptor (A2AAR) were determined to resolutions of 1.8 and 4.2 Å using 4 and 24 consecutive 100 ps X-ray pulse exposures, respectively. Strong PK data were processed using existing Laue approaches, while weaker A2AAR data required an alternative data-processing strategy. This demonstration of the feasibility presents new opportunities for time-resolved experiments with microcrystals to study structural changes in real time at pink-beam synchrotron beamlines worldwide.

Imaging of the pulmonary circulation in the closed-chest rat using synchrotron radiation microangiography

2007 ◽  
Vol 102 (2) ◽  
pp. 787-793 ◽  
Author(s):  
Daryl O. Schwenke ◽  
James T. Pearson ◽  
Keiji Umetani ◽  
Kenji Kangawa ◽  
Mikiyasu Shirai
Keyword(s):  
Pulmonary Arterial Hypertension ◽  
Synchrotron Radiation ◽  
Arterial Hypertension ◽  
Pulmonary Circulation ◽  
Structural Changes ◽  
Dynamic Changes ◽  
Male Adult ◽  
Closed Chest ◽  
Pulmonary Vasoconstriction ◽  
Pulmonary Arterial

Structural changes of the pulmonary circulation during the pathogenesis of pulmonary arterial hypertension remain to be fully elucidated. Although angiography has been used for visualizing the pulmonary circulation, conventional angiography systems have considerable limitations for visualizing small microvessels (diameters < 200 μm), particularly within a closed-chest animal model. In this study we assess the effectiveness of monochromatic synchrotron radiation (SR) for microangiography of the pulmonary circulation in the intact-chest rat. Male adult Sprague-Dawley rats were anesthetized, and a catheter was positioned within the right ventricle, for administering iodinated contrast agent (Iomeron 350). Subsequently, microangiography of pulmonary arterial branches within the left lung was performed using monochromatic SR. Additionally, we assessed dynamic changes in vessel diameter during acute hypoxic (10% and 8% O2 for 4 min each) pulmonary vasoconstriction (HPV). Using SR we were able to visualize pulmonary microvessels with a diameter of <100 μm (the 4th generation of branching from the left axial artery). Acute hypoxia caused a significant decrease in the diameter of all vessels less than 500 μm. The greatest degree of pulmonary vasoconstriction was observed in vessels with a diameter between 200 and 300 μm. These results demonstrate the effectiveness of SR for visualizing pulmonary vessels in a closed-chest rat model and for assessing dynamic changes associated with HPV. More importantly, these observations implicate SR as an effective tool in future research for assessing gross structural changes associated with the pathogenesis of pulmonary arterial hypertension.

The two-step phase transition of titanite, CaTiSiO5: a synchrotron radiation study

1997 ◽  
Vol 212 (1) ◽  
Author(s):  
S. Kek ◽  
M. Aroyo ◽  
U. Bismayer ◽  
C. Schmidt ◽  
K. Eichhorn ◽  
...  
Keyword(s):  
Phase Transition ◽  
Synchrotron Radiation ◽  
Diffraction Data ◽  
Structural Changes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Radiation Study

AbstractIn this study it is shown that the antiferrodistortive phase transition in titanite, CaTiSiOIn order to study the stepwise structural changes synchrotron radiation was used to collect X-ray diffraction data at 100 K, 295 K and 530 K on the 4-circle diffractometer at HASYLAB using a wavelength of 0.560(1) Å. A total of 2292 reflections were recorded at 100 K, 1540 at 295 K and 1442 at 530 K and reduced to 705 (100 K), 707 (295 K) and 358 (530 K) unique observations respectively (sin

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