Influence of EP and AW additives on the tribological behaviour of hard low friction coatings

被引：47

作者：

Podgornik, B ^{[1
]}

Jacobson, S ^{[1
]}

Hogmark, S ^{[1
]}

机构：

[1] Uppsala Univ, Angstrom Lab, Tribomat Grp, SE-75121 Uppsala, Sweden

来源：

SURFACE & COATINGS TECHNOLOGY | 2003年 / 165卷 / 02期

关键词：

DLC coatings; boundary lubrication; additives; friction; wear;

D O I：

10.1016/S0257-8972(02)00766-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The aim of the present work was to investigate the influence of conventional extreme-pressure (EP) and anti-wear (AW) additives on the tribological performance of hard low-friction coatings in the boundary lubrication regime. Tests were performed in a load-scanning test rig, where DLC coated steel bars were loaded against coated and uncoated bars, while the steel/steel combination was used as a reference. This test configuration involves two crossed bars that are forced to slide reciprocally against each other under a constant speed, allowing the normal load to gradually increase during the forward stroke and to correspondingly decrease during the reverse stroke. Load-scanning tests were performed under boundary lubrication conditions using four lubricants; pure poly-alpha-olefin oil (PAO), PAO mixed with commercial sulfur-based EP additive or ZDP-based AW additives, and fully formulated gearbox oil. Results of this investigation show that also under boundary lubrication conditions introduction of hard low-friction coatings and usage of additivated oils significantly improve the tribological performance. Furthermore, the coatings were found to have a great influence on the running-in process. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：168 / 175

页数：8

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