Next Article in Journal
Tribofilm Formation As a Result of Complex Interaction at the Tool/Chip Interface during Cutting
Previous Article in Journal
Abrasive Resistant Coatings—A Review
Lubricants 2014, 2(2), 90-112; doi:10.3390/lubricants2020090
Review

Reducing Friction and Wear of Tribological Systems through Hybrid Tribofilm Consisting of Coating and Lubricants

* ,
 and
Received: 6 March 2014 / Revised: 8 April 2014 / Accepted: 17 April 2014 / Published: 23 June 2014
(This article belongs to the Special Issue Tribology of Carbon-Based Coatings)
View Full-Text   |   Download PDF [754 KB, uploaded 23 June 2014]   |   Browse Figures

Abstract

The role of surface protective additives becomes vital when operating conditions become severe and moving components operate in a boundary lubrication regime. After protecting film is slowly removed by rubbing, it can regenerate through the tribochemical reaction of the additives at the contact. However, there are limitations about the regeneration of the protecting film when additives are totally consumed. On the other hand, there are a lot of hard coatings to protect the steel surface from wear. These can enable the functioning of tribological systems, even in adverse lubrication conditions. However, hard coatings usually make the friction coefficient higher, because of their high interfacial shear strength. Amongst hard coatings, diamond-like carbon (DLC) is widely used, because of its relatively low friction and superior wear resistance. In practice, conventional lubricants that are essentially formulated for a steel/steel surface are still used for lubricating machine component surfaces provided with protective coatings, such as DLCs, despite the fact that the surface properties of coatings are quite different from those of steel. It is therefore important that the design of additive molecules and their interaction with coatings should be re-considered. The main aim of this paper is to discuss the DLC and the additive combination that enable tribofilm formation and effective lubrication of tribological systems.
Keywords: DLC; additive; boundary lubrication; coating-lubricant combination; lubrication mechanism DLC; additive; boundary lubrication; coating-lubricant combination; lubrication mechanism
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote
MDPI and ACS Style

Yazawa, S.; Minami, I.; Prakash, B. Reducing Friction and Wear of Tribological Systems through Hybrid Tribofilm Consisting of Coating and Lubricants. Lubricants 2014, 2, 90-112.

View more citation formats

Related Articles

Article Metrics

Comments

Cited By

[Return to top]
Lubricants EISSN 2075-4442 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert