Friction and wear of hydrogenated and hydrogen-free diamond-like carbon films: Relative humidity dependent character | |
Shi J(师晶)1,2; Gong ZB(龚珍彬)1,2; Wang YF(王永富)1,2; Gao KX(高凯雄)1; Zhang JY(张俊彦)1; Zhang JY(张俊彦) | |
刊名 | Applied Surface Science |
2017 | |
卷号 | 422页码:147-154 |
关键词 | Diamond Like Carbon Relative Humidity Friction Capillary Force Tribofilm |
ISSN号 | 0169-4332 |
DOI | 10.1016/j.apsusc.2017.05.210 |
英文摘要 | In this study, tribological properties of hydrogenated and hydrogen free diamond-like carbon films at various relative humidity (RH) were investigated to understand the friction mechanism in the presence of water molecules. At normal load of 2N, DLC-H film's friction coefficient was 0.06 at RH14% while DLC film's friction coefficient was 0.19 at RH17%. With the increase of RH, their friction coefficient converged to about 0.15. This character remained unaltered when the normal load was 5N. Results show that low friction of DLC-H film at low RH was attributed to the low shear force aroused by graphitic tribofilm at wear care center. However, the high friction of DLC film was mainly endowed by the high adhesive force aroused by sigma dangling bonds. At high RH, solid-to-solid contact was isolated by water molecules confined between the counterfaces, where capillary was a dominant factor for friction. In addition to the capillary force, the absence of tribofilm was also accountable. These two factors lead to the level off of friction coefficient for DLC-H and DLC films. Moreover, for both DLC-H and DLC films, tribo-oxidization was proved to be closely related to wear rate with the assist of H2O molecules during sliding. |
学科主题 | 材料科学与物理化学 |
资助项目 | 纳米润滑研究组 |
语种 | 英语 |
WOS记录号 | WOS:000410606900018 |
资助机构 | the Major State BasicResearch Development Program of China (973 Program) (No. 2013CB632304);the tribology science fund of state key laboratory of tribology (SKLTKF14B09;the natural science foundation of Gansu Province (Grant No. 1506RJYA295) |
内容类型 | 期刊论文 |
源URL | [http://ir.licp.ac.cn/handle/362003/22491] |
专题 | 兰州化学物理研究所_先进润滑与防护材料研究发展中心 兰州化学物理研究所_固体润滑国家重点实验室 |
通讯作者 | Zhang JY(张俊彦) |
作者单位 | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Shi J,Gong ZB,Wang YF,et al. Friction and wear of hydrogenated and hydrogen-free diamond-like carbon films: Relative humidity dependent character[J]. Applied Surface Science,2017,422:147-154. |
APA | Shi J,Gong ZB,Wang YF,Gao KX,Zhang JY,&张俊彦.(2017).Friction and wear of hydrogenated and hydrogen-free diamond-like carbon films: Relative humidity dependent character.Applied Surface Science,422,147-154. |
MLA | Shi J,et al."Friction and wear of hydrogenated and hydrogen-free diamond-like carbon films: Relative humidity dependent character".Applied Surface Science 422(2017):147-154. |
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