Friction and nanowear of hard coatings in reciprocating sliding at milli-Newton loads

Small amplitude reciprocating wear performance of diamond-like carbon films: dependence of film composition and counterface material

“…Achanta, Drees, and Celis found a decrease in 525 surface roughness of DLC films (quantified by AFM) 526 with increasing number of reciprocating cycles in con-527 tact with a spherical silicon nitride counterbody, and 528 reported a steady state friction coefficient of 0.1 in air 529 (0.10 N load, 400 lm sliding amplitude at 0.2 Hz for 530 1000-5000 cycles) [52]. Drees, Celis, and Achanta 531 reported friction coefficients of $0.19-0.25 for recipro-532 cating sliding of silicon nitride against DLC under 533 similar conditions (0.25 N load, 300 lm sliding ampli-534 tude at 0.5 Hz for 1000 cycles) [22].…”

Advanced Nanomechanical Test Techniques

“…The authors identified two distinct fretting wear regimes, with classic W-shaped wear scar under low oscillation amplitude and full U-shaped wear scar at larger amplitudes. Finally, micro-wear behaviour of DLC and TiN coatings using microtribometer setup under reciprocating sliding was investigated by Achanta et al, where the wear mechanism and topographical changes within the wear tracks were investigated using AFM analysis [80][81].…”

Nanotribology of MEMS/NEMS

“…The wear rate was determined by measuring the decrease in the length of circular projections. Achanta et al [66] elaborated a method for determining nanowear by first performing a wear test on coatings at low normal forces using a MUST microtribometer and then characterizing wear by observing changes in surface topography using an AFM.…”