Institute of Bionanoceramics and Nanocomposite Technology, Georgian Technical
University, Kostava str. 69, 0175, Tbilisi, Georgia
kowsiri@gtu.ge
Resume: Purpose: Determination of the dependence of the macromechanical properties
of the consolidated body on the content of the porous phase, its size, distribution in the
matrix and shape factor.The purpose of the work is to develop a formula for the
dependence of the macromechanical properties of ceramics and ceramic compositions, the
weakest component in the structure of the material, on the porous phase. Method. Based
on the study and analysis of micro- and macrostructural, micro- and macromechanical
characteristics of ceramics and ceramic compositions, the morphology of the porous
phase, the parameters of the formula are determined and created. Results. The formula
includes macromechanical properties, that is, with the complete destruction of the product:
bending mechanics with three- and four-point loading, warping mechanics, shear, impact
on viscosity.From the morphological characteristics: the content of the porous phase in the
matrix and their distribution, size, pores, shape factor.Correlation dependence of these
properties on other components of the structure, such as: crystalline and vitreous phases.
A completely new definition of the pore redistribution coefficient is given.
P
? m/p=-------------------
Fp . P d . Pvol. .Pm
Where: P is load, MPa; Fp-pore form factor; Pore redistribution factor in the P d -matrix.The
mentioned value is defined as 1, the assessment of its value depends on the researcher
based on the morphological picture.Depending on how the pores are distributed in the
material and what size they are. The coefficient value can vary from 1 to 0.8 tenths. If the
pores are uniformly distributed in the matrix and approximately the same size, the
coefficient is taken equal to 1. The coefficient is determined as 0.9 if the distribution of
pores is uneven, and 0.8 if the process of merging of pores has begun; Pvol.-volume
fraction of the porous phase in the matrix; Average size of pores - Pm. Conclusion.The
created formula is of a collective nature, and its use will allow researchers and practitioners
to correctly plan and accurately implement all the provisions of technological production
processes.