Friction and wear of hydrogenated and hydrogen-free diamond-like carbon films: Relative humidity dependent character | |
Department | 先进润滑与防护材料研究发展中心 |
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) | |
The second department | 固体润滑国家重点实验室 |
2017 | |
Source Publication | Applied Surface Science |
ISSN | 0169-4332 |
Volume | 422Pages:147-154 |
Abstract | 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. |
Keyword | Diamond Like Carbon Relative Humidity Friction Capillary Force Tribofilm |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.apsusc.2017.05.210 |
Funding Organization | 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) |
Indexed By | SCI |
If | 3.387 |
Language | 英语 |
Funding Project | 纳米润滑研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22491 |
Collection | 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 固体润滑国家重点实验室(LSL) |
Corresponding Author | Zhang JY(张俊彦) |
Affiliation | 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 |
Recommended Citation 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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