Abstract:Al₂O₃/Ni-Co composites with different additives and Al₂O₃ particles were fabricated by pulse current electrodeposition. The effects of different additives and Al₂O₃ particles on the surface smoothness, micro-hardness and plastic deformation at room temperature and high temperature were compared. Scanning electron microscopy was employed to examine the microstructures of the as-deposited and deformed samples. The hardness, fracture strength at room temperature and elongation at superplastic temperature of the material reach HV469, 1 150 MPa and 632%, respectively, when the saccharin was used as additive.

Key words: additives; composites; mechanical properties; pulse current electrodeposition