Effect of Liquid-Solid Volume Ratio and Surface Treatment on Microstructure and Properties of Cu/Al Bimetallic Composite

Due to exceptional conductivity, lightweight nature, corrosion resistance, and various other advantages, Cu/Al bimetallic composites are extensively utilized in the fields of communication, new energy, electronics, industries. To solve problem poor metallurgical bonding caused by high-temperature oxidation Cu, different coating thicknesses Ni layer on Cu rods were used fabricate composite gravity casting. The effect liquid–solid volume ratio thickness microstructure properties a investigated this study. results indicated that transition zone width increased from 242.3 μm 286.3 shear strength 17.8 MPa 30.3 with varying 8.86 50. 1.5 3.8 μm, due effectively preventing surface rod promoting interface. presence residual casted material hinders diffusion process Al atom. Therefore, exhibited decreasing trend as 5.9 μm. Shear fracture observation revealed initiation propagation cracks occurred within composite.