Tribological performance of DLC/DLC and steel/DLC contacts in the presence of additivated oil

Mannan, Abdul and Sabri, Mohd Faizul Mohd and Kalam, Md. Abul and Masjuki, Haji Hassan (2018) Tribological performance of DLC/DLC and steel/DLC contacts in the presence of additivated oil. International Journal of Surface Science and Engineering, 12 (1). pp. 60-75. ISSN 1749-785X

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Official URL: https://doi.org/10.1504/IJSURFSE.2018.090055

Abstract

In this study, the tribological properties of ta-C DLC were largely influenced by the counter surfaces and additives. The DLC/DLC contact showed approximately 60% lower wear when tested with additivated oil compared to that of base oil and this result was 66% in steel/DLC contact. Friction coefficient in DLC/DLC contact was lower than in steel/DLC contact under both oils. But however, both contacts showed slightly higher friction coefficient under additivated oil compared to that of base oil. In steel/DLC, the thermo-chemical reaction between carbon and iron and/or the fusion of the transferred particles were prevented by additives which were present under base oil. The fracture found on DLC surface in steel/DLC contact under additivated oil indicates that the tribolayer formed on the steel surface would be of brittle nature. The passivation of surfaces in DLC/DLC contact by additives prevented the damage which was observed under base oil.

Item Type: Article
Uncontrolled Keywords: Anti-wear additive; DLC films; Four ball tribo-testing; Friction and wear; Vegetable oil
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 28 May 2019 02:05
Last Modified: 28 May 2019 02:05
URI: http://eprints.um.edu.my/id/eprint/21345

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