Characterization of Functionally Graded Bronze Matrix Ceramic Reinforced Composite Materials

Abstract

In this study, ceramic reinforced bronze matrix functionally graded materials (FGMs) were produced by using powder metallurgy method. B4C, TiC, Mo2C and SiC were selected as ceramic reinforcements. The samples with compositions bronze + 10% SiC, bronze + 10% B4C, bronze + 10% Mo2C, and bronze + 10% TiC were sintered at 750 °C for 90 minutes. Investigations were carried out to assess the mechanical properties and microstructures of specimens. For this purpose, optical microscope, scanning electron microscope (SEM-EDS), and X-ray diffraction (XRD) analysis were applied for microstructure investigations. Sample hardness testing was carried out with the help of Vickers hardness testing device. Composite layers of ceramic particles were homogeneously distributed. Little pore formation was observed. While the upper and lower composite layers of the FGMs produced were hard, the middle layer was found to be ductile. The highest hardness value was reached in the B4C reinforced FGM.