Structure and properties of composite materials based on copper strengthened with diamond nanoparticles by mechanical alloying

Abstract

The structure and properties of composite materials based on copper, strengthened with diamond nanoparticles in an amount of 10 – 35 vol.%, are studied. the starting matrix raw material is coarse copper particles with a size of about 1000 μm. Materials in the form of granules are prepared by mechanical alloying after treatment in a planetary ball mill for 1 – 10 h. Granules are hot pressed at 500°C. The effect of prolonged mechanical alloying on copper – diamond composite material microstructure is studied. The effect of diamond content on composite material microhardness and thermal expansion coefficient is determined.