Shock Wave Compression of NaCl Single Crystals observed by Flash-X-Ray Diffraction

1978 ◽  
Vol 33 (8) ◽  
pp. 918-923 ◽  
Author(s):  
F. Müller ◽  
E. Schulte
Keyword(s):  
Shock Wave ◽  
Single Crystals ◽  
Observation Time ◽  
Plane Shock ◽  
X Ray Diffraction ◽  
X Ray ◽  
Wave Compression ◽  
Shock Wave Compression ◽  
Diffraction Patterns ◽  
Set Up

Flash-x-ray-diffraction patterns (FXD) with an exposure time of 4 ns of NaCl single crystals compressed by plane shock waves are obtained at pressures of about 30 kbar. From the diffraction patterns the compression is determined and compared with Hugoniot data. During shock load the lattice shows an uniaxial compression. While in case of measurements at the free surface an observation time of only a few nanoseconds is available, this experimental set-up allows an observation time of two microseconds.

X‐ray diffraction study of single crystals undergoing shock‐wave compression

1972 ◽  
Vol 21 (1) ◽  
pp. 29-30 ◽  
Author(s):  
Quintin Johnson ◽  
Arthur C. Mitchell ◽  
L. Evans
Keyword(s):  
Shock Wave ◽  
Diffraction Study ◽  
Single Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Wave Compression ◽  
Shock Wave Compression

X-Ray Diffraction During Shock-Wave Compression

1970 ◽  
Vol 25 (16) ◽  
pp. 1099-1101 ◽  
Author(s):  
Quintin Johnson ◽  
A. Mitchell ◽  
R. Norris Keeler ◽  
L. Evans
Keyword(s):  
Shock Wave ◽  
X Ray Diffraction ◽  
X Ray ◽  
Wave Compression ◽  
Shock Wave Compression

Submicrosecond X-Ray Diffraction Studies

1972 ◽  
Vol 16 ◽  
pp. 242-250
Author(s):  
A. C. Mitchell ◽  
Quintin Johnson ◽  
L. Evans
Keyword(s):  
Shock Wave ◽  
Shock Front ◽  
Lithium Fluoride ◽  
X Ray Diffraction ◽  
Time Intervals ◽  
X Ray ◽  
Sensitive Film ◽  
Wave Compression ◽  
Sufficient Intensity ◽  
Shock Wave Compression

AbstractAs a result of interest stemming from shock wave studies carried out at Lawrence Livermore Laboratory, we have developed a capability to conduct x-ray diffraction studies in submicrosecond time intervals. This involves the use of a low impedance flash x-ray device. While there are many applications to which these techniques can be put, our first experiments deal with samples undergoing shock wave compression. These particular experiments are conducted by synchronizing a 40 to 50 nsec flash x-ray device to a shock front which is produced by the detonation of a high explosive placed in contact with a sample. Diffracted radiation is usually recorded on very sensitive film protected by a blast cassette. Thus far we have subjected lithium fluoride, aluminum, and carbon to pressures in the range of 100 to 300 kbar. Either powder or single crystal samples can be used. The principal difficulties of this experiment are the lack of sufficient intensity and the synchronization of the x-ray pulse to the shock front.

Evaluation of Freezing Methods by Low Temperature X-Ray Diffraction

1977 ◽  
Vol 35 ◽  
pp. 330-333
Author(s):  
T. Gulik-Krzywicki ◽  
M.J. Costello
Keyword(s):  
Biological Materials ◽  
Molecular Organization ◽  
X Ray Diffraction ◽  
Glass Capillary ◽  
X Ray ◽  
Rate Dependent ◽  
Before And After ◽  
Freeze Etching ◽  
Diffraction Patterns ◽  
Set Up

Freeze-etching electron microscopy is currently one of the best methods for studying molecular organization of biological materials. Its application, however, is still limited by our imprecise knowledge about the perturbations of the original organization which may occur during quenching and fracturing of the samples and during the replication of fractured surfaces. Although it is well known that the preservation of the molecular organization of biological materials is critically dependent on the rate of freezing of the samples, little information is presently available concerning the nature and the extent of freezing-rate dependent perturbations of the original organizations. In order to obtain this information, we have developed a method based on the comparison of x-ray diffraction patterns of samples before and after freezing, prior to fracturing and replication.Our experimental set-up is shown in Fig. 1. The sample to be quenched is placed on its holder which is then mounted on a small metal holder (O) fixed on a glass capillary (p), whose position is controlled by a micromanipulator.

High Density Bulk Shape Rapid Consolidation of the Yba2Cu307-X Superconductor

1989 ◽  
Vol 169 ◽  
Author(s):  
S. V. Rele ◽  
R. V. Raman ◽  
H. S. Meeks ◽  
R. L. Anderson ◽  
R. N. Shelton ◽  
...  
Keyword(s):  
Volume Fraction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Superconducting Volume Fraction ◽  
One Step ◽  
Hollow Cylinders ◽  
Diffraction Patterns ◽  
Set Up ◽  
Cylinders And Spheres ◽  
High Processing

AbstractA novel rapid densification technique for fabrication of bulk shape YBa2Cu307–xsuperconductor is presented. The Ceracon process is a one‐step, quasi‐isostatic consolidation route utilizing conventional P/M equipment and set‐up. The Ceracon technology has enabled successful fabrication of bulk, shapes such as discs, cylinders, hollow cylinders and spheres along with significant increases in the density up to 95‐98% of the theorertical. The superconducting volume fraction is preserved due to short hold times at the operating temperatures and avoidance of high processing temperatures. Results based on densities, microstructure, susceptibility measurements, X‐ray diffraction patterns and TGA measurements are discussed.

Shock-Wave Compression and X-Ray Studies of Titanium Dioxide

Science ◽  
1967 ◽  
Vol 155 (3768) ◽  
pp. 1401-1404 ◽  
Author(s):  
R. G. Mcqueen ◽  
J. C. Jamieson ◽  
S. P. Marsh
Keyword(s):  
Shock Wave ◽  
Titanium Dioxide ◽  
X Ray ◽  
Wave Compression ◽  
Shock Wave Compression

Residual stress measurement on the I12 JEEP beamline at Diamond Light Source

2010 ◽  
Vol 1 (SRMS-7) ◽  
Author(s):  
A. M. Korsunsky ◽  
X. Song ◽  
F. Hofmann ◽  
B. Abbey ◽  
M. Xie ◽  
...  
Keyword(s):  
Light Source ◽  
Stress Measurement ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hexagonal Close Packed ◽  
Loading Direction ◽  
Diffraction Patterns ◽  
Set Up ◽  
Energy Dispersive Diffraction

One of the multiple capabilities of the new Joint Engineering, Environmental and Processing (JEEP) beamline I12 at Diamond Light Source is the set-up for polychromatic high-energy X-ray diffraction for the study of polycrystalline deformation and residual stresses. The results and interpretation of the first experiments carried out on JEEP are reported. Energy dispersive diffraction patterns from titanium alloy Ti-6Al-4V were collected using the new 23-cell ‘horseshoe’ detector and interpreted using Pawley refinement to determine the residual elastic strains at the macro- and meso-scale. It provides a clear demonstration of the tensile-compressive hardening asymmetry of the hexagonal close-packed grains oriented with the basal plane perpendicular to the loading direction.

Ordering of Mg and Nb in the octahedral positions of the “cubic” perovskite structure of Pb3MgNb2O9

1971 ◽  
Vol 134 (1-2) ◽  
Author(s):  
H. Brigitte Krause ◽  
Donald L. Gibbon
Keyword(s):  
Electron Diffraction ◽  
Single Crystals ◽  
Perovskite Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Diffraction Patterns

AbstractSelected-area electron-diffraction patterns and x-ray diffraction powder patterns were taken of crushed single crystals of Pb

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