Diamond thermal expansion measurement using transmitted X-ray back-diffraction

Crystallite Size Measurement Using X- Ray Diffraction

Mike Meier University of California, Davis September 13, 2004 Figure 1. FEG-SEM image of nanosized aluminum oxide powder. Note the magnification and the size of the micron bar. Also note how the smaller particles and the edges of the larger particles appear to be somewhat transparent. This is because much of the 5 kV electron beam can pass through these thinner parts of the particles. CRYSTALLI...

Direct observation of dynamics of thermal expansion using pump-probe high-energy-resolution x-ray diffraction

Time evolution of thermal expansion in the crystal lattice of diamond was studied on the time scale from 100 ps to 18 μs upon heating of the crystal through the entire thickness by a penetrating optical laser pulse of ≈8 ps in duration. Bragg reflectivity curves were measured at different instants of time using pump-probe high-energy-resolution x-ray diffraction with 10−8 strain sensitivity. Th...

Electron Back Scattered Diffraction : Current State, Prospects and Comparison with X-Ray Diffraction Texture Measurement

Within the past decade Electron Backscatter Diffraction (EBSD) has experienced wide acceptance in metallurgical and geological labs. It is a Kikuchi diffraction device based on the SEM that enables individual grain orientations, local texture, point-to-point orientation correlations, and phases to be determined routinely at a sub-grain size level on the surfaces of bulk polycrystals while explo...

Anomalous Thermal Expansion of HoCo0.5Cr0.5O3 Probed by X-ray Synchrotron Powder Diffraction

Mixed holmium cobaltite-chromite HoCo0.5Cr0.5O3 with orthorhombic perovskite structure (structure type GdFeO3, space group Pbnm) was obtained by solid state reaction of corresponding oxides in air at 1373 K. Room- and high-temperature structural parameters were derived from high-resolution X-ray synchrotron powder diffraction data collected in situ in the temperature range of 300-1140 K. Analys...

Effect of Ca-Montmorilionite Expansion on X-ray Diffraction lntensities