Synthesis, structural characterization, mechanical and wear behaviour of Cu-TiO2-Gr hybrid composite through stir casting technique

Manufacturing copper metal matrix composite (CMMCs) through stir casting method results in numerous desirable benefits. This research is dedicated on fabricating Cu with 0, 3, 6 and 9 wt% TiO2 and 1% Gr CMMCs. The reinforcement particles were added to Cu molten metal at 1200 °C. The cast CMMCs have been analysed using advanced characterization method viz. XRD, FESEM and EDAX. XRD peaks confirm the presence of hard ceramic TiO2 particles in the matrix. Grain refinement takes place in the composite due to TiO2 particles. Two kinds of distribution are observed in the micrographs. By increasing the content of TiO2 and Gr, agglomeration occurs within the grain boundaries and reduces the grain size. As a result, hardness and ultimate tensile strength are improved by the incorporation of TiO2 particles and the corresponding strengthening mechanisms involved have been discussed.