Abstract

Surface modification is the major means to improving the wear resistance of copper alloys. In this study, Cu-Mo coatings were prepared on Cu-Cr-Zr alloy by laser cladding, and the high-temperature tribological properties against 7075 aluminum alloy were explored. The results show that the coatings are the two-phase structure of Mo encapsulated in Cu-mesh. The hardness and resistivity of the coatings is 61–73 Hb and (3.2–6.3)×10−8 Ωm, respectively. The wear resistance of the coatings is determined by hardness that relates to Mo content at lower temperatures, and it controlled by the tribo-oxides layer that composed of Cu and Mo oxides at higher temperatures. As the temperature increases, the main wear mechanism of the coatings changes from abrasive wear to adhesive wear.

This content is only available via PDF.
You do not currently have access to this content.