[Introduction]The effects of free microbeads made of different materials on mechanical properties of the copper coating prepared by friction-assisted electroforming need to be studied.[Method]Friction-assisted electroforming of copper was conducted using alumina ceramic microbeads or zirconia ceramic microbeads with a diameter ranging from 0.8 to 1.2 mm as abrasives. The surface micromorphology,cross-sectional metallographic structure,and mechanical properties of the electroformed Cu coatings were compared.[Result]The zirconia ceramic microbeads exhibited a stronger grinding effect on the surface of Cu coating,effectively reducing the number of surface burrs and protrusions and refining the grain size. The Cu coating electroformed under the friction of zirconia ceramic microbeads had a microhardness of 147.2 HV,a tensile strength of 308.3 MPa,and an elongation rate of 19.8％,which were approximately 10.3％,5.7％,and 2.3％ higher respectively than those of the Cu coating electroformed with alumina ceramic microbeads as abrasives.[Conclusion]Selection of suitable free beads as abrasives can improve the surface quality and mechanical properties of copper coating.
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