Abstract
The effect of volume ratios of liquid Babbitt/solid Cu (VL/VS) on the interfacial structure of Babbitt- C93700 Cu bimetallic composites were evaluated. Compound casting process was used for bimetallic composites fabrication. In current research work, Sn-based Babbitt alloy was melted in an electrical furnace and was poured at 420 °C onto mold contains a tinned Cu alloy solid substrate. VL/VS were varied—i.e., 1.5, 3 and 4 in current work. VL/VS affects significantly on the interfacial microstructure and hardness of Babbitt/Cu Bimetallic composite. The presence of insoluble Pb phase in C93700 Cu alloy plays an important role for improving the interfacial bond between Babbitt and C93700 Cu. Bonding area increases by increasing VL/VS. When VL/VS increases to 4, a bonding area of 70% was achieved. The interfacial microhardness increases with increasing VL/VS due to the elements diffusion and the improvements in interfacial bonding area.