We propose a mathematical model of production of multilayer filtering porous permeable materials (PPM) with variable porosity by the method of dry radial-isostatic pressing of ShKh15 steel powder together with a pore-forming material. We find the distribution of density along the radius of a hollow PPM obtained by radial-isostatic pressing. On the basis of theoretical calculations, we analyze the factors responsible for the inhomogeneity of the distribution of porosity in PPM. The fact that the distribution of porosity in a cylindrical pressed PPM is inhomogeneous is established and confirmed by the results of computer simulations. It is shown that the degree of porosity increases with the radius.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 56, No. 4, pp. 88–92, July–August, 2020.
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Povstianoi, O.Y., Rud, V.D., Imbirovych, N.Y. et al. Optimization of the Properties of Multilayer Porous Permeable Materials. Mater Sci 56, 530–535 (2021). https://doi.org/10.1007/s11003-021-00460-2
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DOI: https://doi.org/10.1007/s11003-021-00460-2