A New Method of Materials Characterization for a Complex System by Obtaining the Middle Range Ordering

摘要

Middle range ordering is known to be of great importance for characterizing the structure of various substances in a variety of states. This is particularly true for a complex system. An attempt has been made to present a new method for obtaining information including middle range ordering. In this method, the realistic atomic scale model structure is estimated by fitting both the ordinary interference function and the environmental interference function obtained from anomalous X-ray scattering (AXS) data with model calculation using reverse Monte Carlo (RMC) simulation technique and then middle range ordering in the range of a few nanometers can be visualized. The usefulness of this new method has been demonstrated by some impressive results of molten CuBr and corrosion products (FeOOH) formed on the steel surface.