Papers by Keyword: Mechanical Synthesis

Abstract: The paper presents the results of a computational study of the influence of the geometry of the working chamber on the energy-force interaction of grinding bodies in the process of the mixture processing in a planetary mill. The method of computer simulation, using the software system, based on the ideology of discrete elements, shows the high efficiency of processing in a planetary mill, using a working chamber with a square-shaped cavity. The values of the factors that have a dominant influence on the mechanical processing of the charge are determined. A comparison with the process of processing in the working chamber of the traditional cylindrical shape is made. The research results will be used in the appointment of large-size charge processing regimes that provide a high-energy grinding process.

Abstract: The intermetallic compounds with a skuttedrudite structure were prepared by powder metallurgy methods including mechanical synthesis and pressure sintering. The obtained powders were subjected to milling so as to obtain powders of a nanocrystalline structure. In this work results of phase analysis carried out at particular stages of powders fabrication are presented and the changes in parameters of their crystalline structure are analysed, including the arrangement of X-type atoms within their crystalline lattice which was studied by the Rietveld method.