J1130106 カーボンオニオン微粒子の固体潤滑特性に及ぼすその添加量および基材表面粗さの影響

Abstract

CO(carbon onion particles) are spherical carbon nanoparticles that have a mechanical strength and a reducing effect of friction. By these properties, CO are expected as a new lubricant materials to lead frictional parts to a high function and a lifelong duration. But the problem is shown that CO on sliding surfaces are come off just after sliding. To solve this, these were carried out so far that surface modification of OC and addition of nanometer structure onto sliding surface. These studies have problems that are degeneration of friction property of OC and high fabrication cost. Thus, this paper focuses on fine grooves which can trap lubricant on sliding surfaces with easy techniques. And when I identify surface roughness as fine grooves, the ball-on-disk tribology test to sliding surfaces that CO dispersed was carried out due to investigating effects of additive amount of CO and surface roughness of a substrate on its tribological performance. As results, small roughness of sliding surface was better in terms of minimum friction coefficient, and large one was in terms of stability of friction coefficient. Wear track observation after the friction tests revealed that OC were confirmed along grooves on the surface having large roughness but few CO confirmed on small roughness. Therefore, this revealed that tribological performance of CO maybe affected by interrelationship of additive amount of CO and the depth of fine grooves.