Novel use of anomalous scattering of synchrotron radiation for local atomic order in a disordered ternary alloy

Abstract

A series of studies on the partial X-ray diffuse scattering intensities from ternary alloys analysed through synchrotron radiation experiments has been reviewed. An intensity expression for the short-range order diffuse scattering has been developed, which is necessary in understanding the separation method of an observed X-ray diffuse intensity into partial intensities contributed from different origins. Techniques have been described in detail mainly concerning the Cu,NiZn alloy, which have shown the benefits of the anomalous scattering effect of synchrotron radiation. The negative partial intensity maximum for the Cu-Ni pair found in the Cu-Ni-Zn alloy has been discussed from the viewpoints of crystallography and thermodynamics. In addition, at the end of the paper, local atomic arrangements causing the diffuse scatterings have been discussed.

Local order in Cr-Fe-Co-Ni: Experiment and electronic structure calculations

“…Ternary alloys were rarely investigated (see, e.g., Refs. [6][7][8][9]). With neutron scattering, isotopic replacement then gets mandatory.…”