0000000000793292
AUTHOR
A. I. Ustinov
Influence of Twinning Microstructure of Crystals with Low Tetragonality on a X-Ray Diffraction
The intensity distributions of the X-rays scattered in the tetragonal single crystal, which represent a complex of the twin domains separated by the coherent parallel boundaries, are simulated. The calculations are performed by using the Monte Carlo method within the framework of a kinematical approach. The thickness distributions of the twin domains are defined according to the geometrical, Gaussian and log normal functions. ‘Critical’ effects of the X-ray scattering are found, namely there is transformation of the tetragonal doublet into singlet or multiplet. As demonstrated, each of characteristics of the tetragonal doublet profile depends on a few parameters of the twin microstructure o…
Effect of energy parameters of ball milling on microstructure of Cu nanostructured powder
International audience; The microstructure evolution of Cu nanostructured powders at different conditions of the ball milling is investigated by the x-ray diffraction analysis. The characteristics of as-milled Cu-powder microstructure in terms of crystallite sizes, type, and density of dislocations as well as twin-faults' density are determined by the whole peak-profiles' modelling of powder x-ray diffraction pattern. By comparing of both microstructure characteristics of Cu powder and the ball milling parameters, the dominant factors of ball milling, which affect on the concentration of twin faults, type, and density of dislocations as well as the size of crystallites, are revealed.