Tribological properties of hydrogen free DLC in self-mated contacts against ZDDP-added oil. Issue 6 (13th November 2017)

• Record Type: Journal Article
• Authors: Mannan, Abdul; Mohd Sabri, Mohd Faizul; Kalam, M.A.; Masjuki, H.H.
• Is Part Of: Industrial lubrication and tribology. Volume 69:Issue 6(2017)
• Page Start: 938
• Page End: 944
• Publication Date: 2017-11-13
• Subjects: Abrasive wear -- Antioxidant -- Additive -- Anti-wear additive -- Fiction and wear -- Biolubricant -- DLC film -- Vegetable oil; Lubrication and lubricants -- Periodicals; Tribology -- Periodicals; 621.89
• DOI: 10.1108/ILT-11-2016-0269
• Languages: English
• ISSNs: 0036-8792

Abstract

Abstract : Purpose: The purpose of this study is to investigate the tribological properties of tetrahedral diamond-like carbon (DLC) films in self-mated contacts in the presence of additivated and non-additivated vegetable oils. DLC films have high practical value due to low friction and low wear properties. On the other hand, vegetable oils are considered to be lubricants for future due to its resource renewability and biodegradability. Sometimes different chemical agents are added to vegetable oils to further improve its tribological properties. Thus, the tribological study of DLC films against additivated oils becomes important. Design/methodology/approach: The tribology tests were conducted in a four ball tribo-meter under the boundary lubricated conditions. Findings: Ta-C DLC exhibited 80 per cent lower wear rate under Zinc dialkyldithiophosphates (ZDDP)-added oil compared to that of base oil. In contrast, the friction coefficient under additivated oil was slightly higher than the base oil lubricated case. Moreover, the carbonyl band area as well as the viscosity change of ZDDP-added oil was much smaller than that of base oil. Therefore, ZDDP reduced the wear of DLC film and prevented the oxidation of base oil during tribotests. Originality/value: This is the first work on the tribological properties of ta-C DLC lubricated with corn oil with and without anti-wear additives.