Asymmetric surface texturing for directional friction control under dry sliding condition

This study investigated the effects of asymmetric surface texturing on directional friction under dry condition. Asymmetric micro-grooves were radially textured on electroless nickel phosphorous (Ni-P) plated disk using a single-point diamond cutting process. Using a ball-on-disk tribometer, sliding tests in clockwise (CW) and counter-clockwise (CCW) directions against polyether-ether-ketones (PEEK) material were carried out at different texture densities. Results show that asymmetric surface texturing has a strong effect on directional friction. At a texture density of 70 %, the friction coefficient in the CW direction increased by 28.1 % compared to the CCW direction. The greatest increase in friction coefficient, 61.3 %, was observed during CW rotation at the lowest texture density compared to the reference untextured surface.

Automated summary

This study examined the impact of asymmetric surface texturing on directional friction in a dry environment. Asymmetric micro-grooves were created on an electroless nickel phosphorous (Ni-P) plated disk using a diamond cutting process. Sliding tests were conducted in both clockwise (CW) and counter-clockwise (CCW) directions against polyether-ether-ketones (PEEK) material at various texture densities. The results indicate that asymmetric surface texturing has a significant effect on directional friction. At a texture density of 70%, the friction coefficient in the CW direction increased by 28.1% compared to the CCW direction. The lowest texture density caused a 61.3% increase in friction coefficient during CW rotation compared to the reference untextured surface.