Tribological properties of commercially pure copper with different microstructures, in contact with a graphitic material

摘要

In the present work, we report the results of tribological studies on commercially pure copper (Cu 99.9%) in contact a with graphitic material. The samples under study were made with two types of micro-structures, i.e., a coarse-grained (CG) microstructure with an average grain size of 20-60 mu m after annealing and a submicrocrystalline (SMC) microstructure with an average grain size of 0.22 mu m after severe plastic deformation (SPD) processing through equal-channel angular pressing (ECAP) via the Conform scheme. It has been shown that the SMC samples after ECAP-Conform processing reveal friction coefficients 12-20% lower than in the case of the annealed coarse-grained (CG) sample.