Open AccessBentonite-based composites with ceramic and metallic powders additions for use as filters
Author(s) -
Simona Matei,
Maria Stoicănescu,
Béla Varga,
Elena Tiron,
Aurel Crişan
Publication year - 2021
Publication title -
advances in mechanical engineering/advances in mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 40
eISSN - 1687-8140
pISSN - 1687-8132
DOI - 10.1177/16878140211011888
Subject(s) - materials science , composite material , ceramic , bentonite , compaction , porosity , composite number , sintering , ceramic matrix composite , hot pressing , scanning electron microscope , mixing (physics) , metal , metallurgy , paleontology , physics , quantum mechanics , biology
This paper represents the study of bentonite matrix composite reinforced with ceramic (Al 2 O 3 and SiC) and metallic (Al and Fe) particles for the production of filters. Ceramic powders were used to generate pores and metallic particles to control the pore size (to finish them). These materials were added to composites in two stages. In the first stage, the ceramic particles (Al 2 O 3 and SiC) were added to the bentonite matrix, thus obtaining two types of composites. In the second stage, for each type of composite, metallic powders of Al and Fe were added. The composites was prepared by mixing the components, cold pressing for compaction in cylindrical samples and, at the end, sintering at 1250°C. The samples thus produced underwent studies by optical and electron microscopy, diffractometry, dilatometry and thermal analysis and tests to determine the compressive strength and the porosity. Thus, there was obtained useful information regarding the behaviour and impact of the reinforcing materials in the process of producing the composites, and on their impact on the final properties of the composites produced.