Synchrotron Microtomography of Composites

1988 ◽  
Vol 143 ◽  
Author(s):  
S. R. Stock ◽  
J. H. Kinney ◽  
T. M. Breunig ◽  
U. Bonse ◽  
S. D. Antolovich ◽  
...  
Keyword(s):  
Charge Coupled Device ◽  
High Brightness ◽  
X Ray ◽  
Three Point Bending ◽  
Ccd Detector ◽  
The Matrix ◽  
Dimensional Distribution ◽  
X Ray Computed ◽  
Synchrotron Microtomography

AbstractX-ray computed tomography (CT) uses absorption profiles from many different viewing directions to reconstruct the two-dimensional distribution of x-ray absorptivity within a slice of the sample. The tunability, high brightness and parallelism of synchrotron radiation are critical to high resolution (0.001mm), high contrast (1%) CT or microtomography. In situ study of samples multiple times during the course of an experiment is exciting to consider.Continuous fiber SiC/Al composites were deformed under three-point bending, and the resulting damage and fiber arrangement were revealed with synchrotron microtomography. Several hundred slices of 0.012 mm thickness were recorded simultaneously using 25 key radiation and a phosphor screen/charge coupled device (CCD) detector. Reconstruction was with the filtered back projection method. Low density regions were observed in the matrix in regions of highest stress where cracking is expected.

scholarly journals X-ray transmission grating spectrometer with CCD detector for laser plasma studies

1991 ◽  
Vol 9 (2) ◽  
pp. 579-591 ◽  
Author(s):  
L. Pína ◽  
H. Fiedorowicz ◽  
M. O. Koshevoi ◽  
A. A. Rupasov ◽  
B. Rus ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Array Detector ◽  
Charge Coupled Device ◽  
X Ray ◽  
Transmission Grating ◽  
Hot Plasma ◽  
Ccd Detector ◽  
Wet Processing

A program is under way to develop methods and instrumentation based on charge-coupled device (CCD) sensors for hot plasma diagnostics. We have developed a new X-ray spectrometer in which a freestanding X-ray transmission grating is coupled to a CCD linear array detector with electronic digitized readout replacing film and its wet processing. This instrument measures time-integrated pulsed X-ray spectra with moderate spectral resolution (δλ ≤ 0.6 nm) over a broad spectral range (0.3–2 keV) with high sensitivity, linearity, and large dynamic range. The performance of the device was tested using laser plasma as the X-ray source.

In-situ X-ray computed tomography of composites subjected to fatigue loading

2019 ◽  
Vol 236 ◽  
pp. 128-130 ◽  
Author(s):  
Peter Wagner ◽  
Oliver Schwarzhaupt ◽  
Michael May
Keyword(s):  
Computed Tomography ◽  
Fatigue Loading ◽  
X Ray ◽  
X Ray Computed

Quantitative In-situ Analysis of Water Transport in Concrete Completed Using X-ray Computed Tomography

2018 ◽  
Vol 127 (2) ◽  
pp. 371-389 ◽  
Author(s):  
Tyler Oesch ◽  
Frank Weise ◽  
Dietmar Meinel ◽  
Christian Gollwitzer
Keyword(s):  
Computed Tomography ◽  
Water Transport ◽  
In Situ Analysis ◽  
X Ray ◽  
X Ray Computed

scholarly journals In Situ Coherent X-ray Diffraction during Three-Point Bending of a Au Nanowire: Visualization and Quantification

2018 ◽  
Vol 2 (4) ◽  
pp. 24 ◽  
Author(s):  
Anton Davydok ◽  
Thomas Cornelius ◽  
Zhe Ren ◽  
Cedric Leclere ◽  
Gilbert Chahine ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Reciprocal Space ◽  
X Ray Diffraction ◽  
Complex Deformation ◽  
X Ray ◽  
Three Point Bending ◽  
Atomic Force ◽  
Au Nanowire ◽  
Before And After

The three-point bending behavior of a single Au nanowire deformed by an atomic force microscope was monitored by coherent X-ray diffraction using a sub-micrometer sized hard X-ray beam. Three-dimensional reciprocal-space maps were recorded before and after deformation by standard rocking curves and were measured by scanning the energy of the incident X-ray beam during deformation at different loading stages. The mechanical behavior of the nanowire was visualized in reciprocal space and a complex deformation mechanism is described. In addition to the expected bending of the nanowire, torsion was detected. Bending and torsion angles were quantified from the high-resolution diffraction data.

scholarly journals Observation of microstructure change during freeze-drying by in-situ X-ray Computed Tomography

2018 ◽  
Author(s):  
Kyuya Nakagawa ◽  
Shinri Tamiya ◽  
Shu Sakamoto ◽  
Gabsoo Do ◽  
Shinji Kono ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Freeze Drying ◽  
Glassy State ◽  
Structural Deformation ◽  
Microstructure Formation ◽  
Microstructure Change ◽  
X Ray ◽  
X Ray Computed ◽  
The Many

X-ray computed tomography technique was used to observe microstructure formation during freeze-drying. A specially designed vacuum freeze-drying stage was equipped at the X-ray CT stage, and the frozen and dried microstructures of dextrin solutions were successfully observed. It was confirmed that the many parts of the pore microstructures formed as a replica of the original ice microstructures, whereas some parts formed as a consequence of the dehydration dependent on the relaxation level of the glassy phases, suggesting that the post-freezing annealing is advantageous for avoiding quality loss that relates to the structural deformation of glassy matters. Keywords: freeze-drying; X-ray CT; ice microstructure; glassy state

scholarly journals Collaborative ductile rupture mechanisms of high-purity copper identified by in situ X-ray computed tomography

2019 ◽  
Vol 181 ◽  
pp. 377-384 ◽  
Author(s):  
Brendan P. Croom ◽  
Helena Jin ◽  
Philip J. Noell ◽  
Brad L. Boyce ◽  
Xiaodong Li
Keyword(s):  
Computed Tomography ◽  
High Purity ◽  
Ductile Rupture ◽  
X Ray ◽  
X Ray Computed ◽  
Purity Copper
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