In the present study, aluminum matrix was reinforced with SiC and TiO2 powders to synthesize Al–SiC–TiO2 hybrid composites by using a powder metallurgy route. The influence of variation in TiO2 content is thoroughly evaluated over the microstructure and mechanical properties. The uniform distribution and growth in the interfacial bonding between the matrix phase and reinforcement particles were confirmed from the overall scanning electron micrographs. Further, the measured hardness and density values significantly increased with the increase in TiO2 content. In addition to that, the compressive strength had increased up to 5 wt.% of TiO2. However, at higher content of TiO2, a decreasing trend is found due to the excess cluster formation.

The present work deals with the synthesis and characterization of Al-Cu-SiC-Al2O3 hybrid metal matrix composite with varying percentage of Al2O3. The synthesized hybrid composite samples were conventionally sintered at two different sintering temperatures i.e. 500°C and 600°C for 1 hr each. SEM investigation predicts the uniform distribution of reinforcing particles. The SEM and XRD results of the sintered composites revealed the presence of a new intermetallic alloy CuAl2 phase along with Al and SiC phases. It is observed that the density and hardness of Al-Cu-SiC-Al2O3 hybrid composite increases with increase in wt % of Al2O3 and sintering temperature.

No abstract

No abstract

No abstract