Regularities of formation of structure and properties of porous composites based on basalt fiber in the process of thermocycling
https://doi.org/10.29235/1561-8358-2025-70-4-271-284
Abstract
The results of studying the structure and properties of two compositions of porous composite materials of the CaO–MgO–FeO(Fe2O3)–Al2O3–SiO2 system based on basalt fiber formed during thermal cycling are presented. The samples made from the mixture of composition I had the following structure: basalt fiber (37 wt.%) + mullite-silica fiber (19 wt.%) + modifier Al 2(SO4)3 as a binder (11 wt.%) + blowing agent (19 wt.%) + porcelain as a hardener (4 wt.%) + plasticizer (11 wt.%); II composition: basalt fiber (52 wt.%) + SiO2 (15 wt.%) + blowing agent (1 wt.%) + porcelain (aluminosilicate) as hardener (6.5 wt.%) + plasticizer (CMC, 6.5 wt.%) + limestone flour (calcium carbonate, CaCO3, 19 wt.%). Thermal cycling was carried out in three temperature ranges of 750–770 °C, 1025–1075 °C, 1070–1090 °C in order to obtain certain structure and properties of composites pressed under pressure of 20, 40 and 60 MPa. To control surface morphology, changes in phase composition, amorphousness and fine structure parameters, porosity, permeability and strength properties, samples were evaluated at each process cycle. On the basis of established patterns of structure formation, modes of formation of pore space are proposed with preservation of porosity not lower than 45 %, strength 5–25 MPa, shrinkage in the process of sintering – not more than 20 %. The studied composite materials can be used to create filter elements of systems for separating, cleaning, converting liquid and gaseous media.
Supporting agencies: the work was performed within the framework of Assignment 4.1.34 “Development and research of ceramic materials with a rigid system of microfiltration transport pores based on basalt fibers” of the State Research Program “Materials science, new materials and technologies” for 2021–2025, the Subprogram “Multifunctional and composite materials”.
About the Authors
E. E. Petyushik
State Scientific and Production Association of Powder Metallurgy of the National Academy of Sciences of Belarus
Russian Federation
Russian Federation
Evgeny E. Petyushik – Dr. Sci. (Engineering), Professor, Deputy Director General for Research
41, Platonov St., 220005, Minsk
I. V. Fomikhina
State Scientific Institution “Institute of Powder Metallurgy named after Academician O. V. Roman” of the National Academy of Sciences of Belarus
Belarus
Belarus
Irina V. Fomikhina – Dr. Sci. (Engineering), Associate Professor, Head of the Laboratory of Metal Physics
41, Platonov St., 220005, Minsk
A. A. Drobysh
Belarusian National Technical University
Belarus
Belarus
Aleksey A. Drobysh – Cand. Sci. (Engineering), Associate Professor, Dean of the Faculty of Engineering and Pedagogy
65, Nezavisimosti Ave., 220013, Minsk
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