Investigation on friction and wear performance of volcano-shaped textured PVD coating

Abstract

This study aims to investigate friction and wear performance of a novel volcano-shaped textured PVD coating , hoping to find the influence mechanism of volcano-shaped texture on the tribological behavior of textured coated surface. The volcano-shaped texture was fabricated on the sample surface by laser, and then PVD coating was deposited. For samples with different texture diameters or texture area ratios, reciprocating pin-on-disk wear tests were conducted to study tribological properties. After tests, wear topographies of samples and counter pins were observed to analyze wear details. The results showed volcano-shaped texture with suitable diameters and area ratios was conducive to lowering friction coefficient and reducing adhesive wear . The optimal texture diameter and area ratio were 310 μm and 25%, respectively. Meanwhile, the texture with large area ratios increased friction. These results indicated this texture's potential for friction control. Finally, the influence mechanism of volcano-shaped texture was proposed. • The volcano-shaped texture can both decrease and increase friction. • There exists optimal diameter and area ratio of volcano-shaped texture to achieve best friction and wear performance. • Tribo-film formed on the convex area reduced texture wear. • Influence mechanism of volcano-shaped textured PVD coating on the friction and wear performance was studied.