Self-competing and Coupled Effect of Laser-Engraved Counterface Groove Depth and Density on Wear of Alumina PTFE

Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review

“…In contrast to the beneficial effects of dimples, detrimental effects have been observed for groove-like textures that considerably increased wear rates and transient wear volumes for un-conditioned systems [180]. This was correlated with a decreased ability to store debris in the grooves and accelerated abrasion on the counter-body.…”

“…Most of these employed hard textured substrates such as stainless steel [179][180][181][182][183], bronze [184][185][186], silicon [187] or laminated ceramics [188,189], which were rubbing against an untextured PTFE nano-composite. Surface textures were mainly produced by LST using lasers with pulse durations ranging from micro- [179,181,[184][185][186] and nano- [188,189] to pico- [182] and femtoseconds [180,187]. Regarding the geometry of the textures, research effort has focused on dimples [179, 181-183, 185, 186, 188, 189], unidirectional grooves [180], grid-like textures, and circumferentially or radially aligned grooves [184].…”

“…Surface textures were mainly produced by LST using lasers with pulse durations ranging from micro- [179,181,[184][185][186] and nano- [188,189] to pico- [182] and femtoseconds [180,187]. Regarding the geometry of the textures, research effort has focused on dimples [179, 181-183, 185, 186, 188, 189], unidirectional grooves [180], grid-like textures, and circumferentially or radially aligned grooves [184]. Moreover, individual studies can be found in which textured wear-resistant hard coatings [190] or laminated ceramics [188,189] were filled with PTFE solid lubricant via electrophoretic deposition [190] or spray coating [188,189].…”

“…In the case of an untextured PTFE counter-body (mainly pins) sliding against textured substrates (usually metallic), significant contributions have been made by Ye et al [179][180][181].…”

Recent Progress on Wear‐Resistant Materials: Designs, Properties, and Applications

“…Notably, a promising strategy of integrating surface textures with coatings is attractive in the enhancement of surface tribological behavior at severe contact conditions, where both surface textures and coatings show serious wear. [ 65a ] A combination of surface texturing with soft metal, [ 97 ] polytetrafluoroethylene, [ 98 ] DLC, [ 99 ] or 2D material [ 100 ] coatings can provide low friction coefficients and wear rates. Mechanisms of each strategy are the reservoir effect of textures for metallic materials that shows the self‐lubrication behavior during sliding, formation of transfer‐films, reduction of the real contact area, and trapping effect of textures for 2D lubricant materials.…”