The Influence of Interfaces on the Physicomechanical Properties of Cu/Mg Composites

The structure and the mechanical and electrical properties of composites with 7 and 49 magnesium fibers in the copper matrix are studied in this work. It was found that the strength of a deformed composite wire with the maximum volume fraction of Cu/Mg interfaces exceeds the theoretical estimate and the strength of pure copper. It is shown that deformation-induced formation of high-strength solid solutions of magnesium in copper at the interfaces of the composites occurs during the manufacturing process. The low electrical resistivity of the composites is provided by a copper shell.