Fabrication and characterization of cluster diamond dispersed copper-based matrix composite

The present study describes the fabrication acid characterization of cluster diamond (CD) dispersed Cu composites. A powder metallurgy method combining mechanical milling and hot pressing was used to produce CD dispersed Cu composites. The Cu matrix powders and CD were mechanically milled at 500 rpm in an Ar atmosphere. Particle size distribution analysis showed that the distribution of the milled powders became wider wi th the progress of the mechanical milling. The milled powders were hot pressed ar 723 K in vacuum for 5 minutes. X-ray diffraction analysis showed that the crystal structure of the CD remained unchanged during the fabrication process. Friction measurements showed that the addition of 1 vol.% CD to the Cu matrix improved the coefficient of friction and linear wear, although these properties deteriorated with an increase in the volume fraction of CD.