Anisotropic Friction Behavior of Highly Oriented Pyrolytic Graphite
The friction tests on two surfaces of highly oriented pyrolytic graphite that are parallel and perpendicular to the direction of graphite basal plane were performed under various test conditions.The average friction coefficient value of the perpen dicular surface (0.25) is extremely higher than that of the parallel surface (0.1).With the atmosphere in environment changes from wet air to wet nitro gen, the friction coefficient of both parallel and per pendicular surfaces shows a corresponding decline, and the trend is more pronounced for perpendicular surface.The perpendicular worn surface has been observed to be much rougher and owns more edge faces than parallel worn surface.The amount of dangling bonds and chemisorbed oxygen measured on both surfaces after friction is quite different The influence of atmosphere on the friction of graphite is attributed to the chemical reaction of dangling bonds with gases, which can affect the adhesive force of the two contact surfaces.The amount of dangling bonds generated on the sliding surface is confirmed to im pact the sensitivity of graphite to gases during fric tion.
materials new energy nano materials surface engineering metallurgical process
Jinkun Xiao Lei Zhang Kechao Zhou Xinlin Xie Zhiyou Li
State Key Laboratory for Powder Metallurgy,Central South University,Changsha 410083,China
国际会议
The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)
昆明
英文
178-184
2013-11-19（万方平台首次上网日期，不代表论文的发表时间）