Effect of tribochemistry on friction behavior of fluorinated amorphous carbon films against aluminum

被引：18

作者：

Wang, Fu ^{[1
,3
]}

Lu, Zhibin ^{[1
]}

Wang, Liping ^{[1
,2
]}

Zhang, Guangan ^{[1
]}

Xue, Qunji ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Marine Mat & Related Technol, Ningbo 315201, Zhejiang, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2016年 / 304卷

基金：

中国国家自然科学基金;

关键词：

a-C:H:F films; Aluminum; F content; Friction; Tribo-layer; Tribochemistry; DIAMOND-LIKE-CARBON; TEMPERATURE TRIBOLOGICAL BEHAVIOR; DLC COATINGS; ALLOYS; PERFORMANCE; SURFACES; MECHANISMS; ATMOSPHERE; ADHESION; HYDROGEN;

D O I：

10.1016/j.surfcoat.2016.06.087

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fluorinated amorphous carbon (a-C:H:F) films synthesized from C2H2 and CF4 were examined by Raman spectra and X-ray photoelectron spectroscopy (XPS). Their tribological properties were tested against aluminum balls in dry sliding. The a-C:H:F films with low F content showed lower friction coefficient than hydrogenated amorphous carbon (a-C:H) film, whereas high F content in films resulted in a significant friction increase. Contact surfaces were analyzed in detail to elucidate the possible sliding mechanism. Results indicated that the friction behavior was closely related to the nature of a composite-like tribo-layer consisting of Al compounds and carbon components formed on Al ball, relying on the tribochemical processes of contact interface. The accumulated F atoms on tribo-layer reduced the adhesion across sliding interface because of strong repulsion between F atoms, and thereby lowered the friction of a-C:H:F films. However, with increasing F contents in films, the enhanced tribochemical reaction between Al and F caused crack, delamination and fragmentation of the tribolayer, and then a marked abrasive process at the sliding interface. Consequently, the increased shearing and abrasive actions strongly opposed the contribution of the reduced adhesion to friction, and result in a rather high friction of highly fluorinated a-C:H:F films. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：150 / 159

页数：10

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