Povstyanoy O. Multilayer porous permeable materials with adjustable porosity from industrial waste

The dissertation is devoted to forecasting, modeling patterns of structure formation and properties of porous permeable materials taking into account the size of structural elements of the mixture, establishing physical relationships between components, structure and properties of the finished product, their performance properties. A model of plastic deformation of powder-porous media has been developed and proposed, which, in contrast to the existing ones, takes into account the inhomogeneity of the density distribution along the radius during radial-isostatic pressing. Based on the obtained calculation data, the regularities of material characteristics change during pressing of multilayer porous materials are established, namely radial velocity makes it possible to control the porosity distribution in multilayer PPM and increase the degree of redistribution by increasing the accumulated powder deformation. Regularities of density distribution along the radius of each PPM layer at different time of deformation time are also established. The distribution of porosity is uneven. More intensive compaction of the material occurs near the axial rod of the capsule. Model researches of formation of filling of powders taking into account properties of material on the basis of models of the generalized casual packing are offered. The developed new technique for applying combined coatings for structural parts from industrial waste can be applied to porous permeable materials to increase corrosion and wear resistance. The results of the dissertation are used in the application of the developed porous permeable products for purification of technical, industrial waters, oils and fuels from mechanical impurities, contaminants. Keywords: porous permeable material, porosity, backfill, packaging, pressing, sintering, permeability, forecasting, computer simulation, coating.