The influence of roughness on friction

The friction coefficient on polycarbonate as a function of the contact pressure and nanoscale roughness

“…To find a correlation between roughness and friction, Meine et al focused on a rigid ball sliding on a structured silicon wafer under a 100 mN loading force. Artificially constructed obstacles having a height of 160 nm and a frictional response were studied for a single step obstacle17 and then a multistep obstacle with a step distance ranging from 100 to 0.1 μm 18. It was concluded that there is a direct dependency of the frictional force on the roughness: the friction increased with an increasing number of asperities inside the contact area.…”

Influence of surface roughness and contact load on friction coefficient and scratch behavior of thermoplastic olefins

“…Although extensive research has been undertaken to uncover the relationship between friction and tribology [14][15][16][17][18][19][20][21][22][23][24][25][26][27], the findings have not led any definitive conclusions even for metals. Although a similar concept for metals can also be used for investigating friction in polymers, the physical and mechanical properties of polymers are more complex and bring more challenges.…”

Improvement of Water Lubricity of Titanium Nitride–Titanium Composite by Hydrophilic Silane Coupling Agent

“…The lubrication conditions of the TiN–Ti composite in water and in the aqueous solution of Silane A were the boundary lubrication conditions as judged by the friction coefficient and the wear scar 21 . The friction under the boundary lubrication conditions increases with increases in the surface roughness 22–25 . The material removal because of dissolution caused the smoothing of the sliding surface in the Silane A solution.…”