The influence of corrosion on diamond-like carbon topography and friction at the nanoscale

被引：10

作者：

Elam, Fiona M. ^{[1
,2
]}

Hsia, Feng-Chun ^{[1
,2
]}

van Vliet, Stefan ^{[1
]}

Bliem, Roland ^{[1
,2
]}

Yang, Liuquan ^{[3
]}

Weber, Bart ^{[1
,2
]}

Franklin, Steve E. ^{[1
,4
]}

机构：

[1] Adv Res Ctr Nanolithog ARCNL, Sci Pk 106, NL-1098 XG Amsterdam, Netherlands

[2] Univ Amsterdam, Van der Waals Zeeman Inst, IoP, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

[3] Univ Leeds, Sch Mech Engn, Leeds LS2 9JT, W Yorkshire, England

[4] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

CARBON | 2021年 / 179卷

基金：

英国工程与自然科学研究理事会;

关键词：

Corrosion; Diamond-like carbon; Topography; Friction; Oxidation; Adhesion; DLC COATINGS; TRIBOCORROSION BEHAVIOR; THIN-FILMS; PERFORMANCE; ALLOY; SURFACE; FORCE; ADSORPTION; PARTICLES; TRIBOLOGY;

D O I：

10.1016/j.carbon.2021.04.068

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of corrosion upon the nanoscale topography and friction response of a hydrogenated amorphous carbon film (a-C:H) was investigated. Electrochemical atomic force microscopy was used to characterise topographical changes to the coating at two oxidative potentials. Corrosion of the coating at 1.5 V (corrosion rate 0.5 nm h(-1)) resulted in no changes to the nanoscale topography; whereas corrosion at 2.5 V (corrosion rate 26.4 nm h(-1)) caused the root mean square roughness of the a-C:H film topography to decrease, but the local fine-scale irregularity or 'jaggedness' of the surface to increase. X-ray photoelectron spectroscopy revealed that corrosion at both potentials oxidised the a-C:H surface to form alcohol, carbonyl and carboxyl groups. Lateral force microscopy and adhesion force measurements showed that both the friction force and surface adhesion of the coating increased upon corrosion. The outcome was attributed to the surface oxidation that had occurred at both oxidative potentials, resulting in several potential mechanisms including increased attractive intermolecular interactions and capillary forces. The highest friction coefficient was observed for the a-C:H film corroded at 2.5 V, and identified as a consequence of the jagged surface topography promoting an interlocking friction mechanism. (C) 2021 The Authors. Published by Elsevier Ltd.

引用

页码：590 / 599

页数：10

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