Tribological behavior and mechanism of self-lubricating wear-resistant composite coatings fabricated by one-step plasma electrolytic oxidation

被引：53
作者：
Yin, Bing [1 ]
Peng, Zhenjun [1 ]
Liang, Jun [1 ]
Jin, Kongjie [1 ]
Zhu, Shengyu [1 ]
Yang, Jun [1 ]
Qiao, Zhuhui [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2016年 / 97卷
基金：
中国国家自然科学基金;
关键词：
Coatings and friction-reducing; Wear-resistant; Dynamic modelling; Wear mechanism; MICROARC OXIDATION; ALLOY; NANOCOMPOSITES; PERFORMANCE; GRAPHITE;
D O I：
10.1016/j.triboint.2016.01.020
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The productions of self-lubricating alumina-graphite composite coatings were prepared through onestep plasma electrolytic oxidation in an appropriate graphite-dispersed electrolyte solution, and the microstructure, composition and phase constituents were examined. The friction and wear properties were investigated by sliding the disk samples against Si3N4 balls under dry and deionized water conditions, respectively. Molecular dynamics simulations about the interface states of graphite were also carried out to assist in the evaluation of the self-lubricating and wear-resistant mechanisms, making up the weakness of the conventional experimental method in microscopic study. The results indicated that the oxidation coatings greatly improved the wear resistance of pure aluminum. Further improvement in the wear resistance was achieved by self-lubricating of solid lubricant in oxidation coatings. In wear process, the wear debris aggregated together on the worn surface and the graphite particles formed layered structures, which exhibited excellent self-lubricating behavior and decreased the shear stresses generated by the moving stylus. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：97 / 107
页数：11
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