微小荷重下のDLCの摩擦特性に及ぼす雰囲気の影響

抄録

In this study, flat DLC (diamond-like carbon) coated samples and micro-patterned DLC coated samples were prepared to investigate the effects of surface topography and atmosphere on friction properties. Two types of ball-on-plate friction testers were used for the experiments at high and micro loads. Tests were conducted at a load of 1 N in the high load range and 1 mN in the micro load range. The atmosphere was changed between air and vacuum, and the sample was reciprocated 3000 times, and the friction coefficient was determined as the average of 50 reciprocations. In the high load range, the friction coefficient in vacuum was higher than that in air. The micro-patterned sample showed a lower friction coefficient than the flat sample after continued sliding. This could be attributed to the film regeneration as the solid lubricant was transferred from the grooves. In the micro load range, the coefficient of friction in vacuum was lower than that in air.