Establishment of design concept for reduction of static friction coefficient of hard carbonaceous coatings under dry condition

本研究的目的是建立降低硬质碳涂层在干燥条件下静摩擦系数的设计概念。等离子体CVD镀膜类金刚石膜表面粗糙度Ra随沉积时间的延长而增大。摩擦系数随粗糙度平均倾角的增大而增大。环境控制型摩擦试验机表明，高湿空气增加了DLC的摩擦力。含氟类金刚石由于附着力降低，即使在高湿空气中也表现出较低的摩擦力。从犁耕和摩擦粘着条件的角度提出了降低DLC静摩擦力的设计思想。

The purpose of this research is to establishment of design concept for reduction of static friction coefficient of hard carbonaceous coatings under dry condition. Plasma CVD coated DLC showed the increasing of surface roughness Ra with depositionperiod. The friction coefficient increased with the average inclined angle of asperities. The environmental control friction tester showed that high humid air increased friction of DLC. Fluorine contained DLC showed low friction even if in high humid air because of the reduction of adhesion. We proposed the design concept for reduction of static friction of DLC in the viewpoints of ploughing and adhesion term of friction.