Tribological performance of DLC/DLC and steel/DLC contacts in the presence of additivated oil. (2018)

• Record Type: Journal Article
• Authors: Mannan, Abdul; Sabri, M.F.M.; Kalam, Md. Abul; Hassan, Masjuki H.
• Is Part Of: International journal of surface science and engineering. Volume 12:Number 1(2018)
• Page Start: 60
• Page End: 75
• Publication Date: 2018
• Subjects: DLC films -- vegetable oil -- four ball tribo-testing -- anti-wear additive -- friction and wear; Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Surfaces (Technology) -- Periodicals; Tribology -- Periodicals; 530.417
• Languages: English
• ISSNs: 1749-785X

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.