Effect Of Pressure On The Microstructure, Mechanical and Thermal Conductivity Properties Of Composite Materials with Matrix of AA2024 or AA6061 and Reinforced B4C or SiC Produced by Pressurized Infiltration Method

In this study, the effect of matrix composition and pressure value on the microstructure and mechanical properties of composite materials produced by AA2024 and AA6061 matrix and 50% B4C and SiC particle supplementation were investigated. Performs were formed by using SiC powders with B4C powders having an average grain size of 48 μm and a particle size of 37 μm. The prepared preforms were infiltrated with aluminum matrices at 7 and 8 bar pressures using the pressure infiltration technique at 800 o C. The microstructure analysis of the composite materials was carried out using EDS-equipped scanning electron microscope (SEM). A homogeneous microstructure was observed at the SEM analysis of the obtained samples. The porosity analysis was done by using the apparatus with the suspension apparatus in the integrated alcohol. A decrease in the porosity volume ratio was obtained with increasing pressure. It has been observed that the increase in the pressure amount of the composite materials produced increases the hardness strengths and compressive strengths. In addition, it is observed that B4C reinforced composite materials have better mechanical properties than SiC reinforced composite materials when the reinforcement elements are compared