Al-Jeboori, Y, Kosarieh, S orcid.org/0000-0002-0210-7165, Morina, A orcid.org/0000-0001-8868-2664 et al. (1 more author) (2018) Investigation of pure sliding and sliding/rolling contacts in a DLC/Cast iron system when lubricated in oils containing MoDTC-Type friction modifier. Tribology International, 122. pp. 23-37. ISSN 0301-679X
Abstract
Diamond-like carbon (DLC)/cast iron (CI) systems have been widely investigated due to their important application in engine components such as cylinders, pistons and more specifically for the cam/follower interface. The pure sliding contact of the DLC/CI system has traditionally been the focus of research; consequently less is understood about sliding/rolling contact systems. In addition, the tribological and tribochemical characteristics of the Molybdenum Dialkyl Dithiocarbamate (MoDTC) as a lubricant additive in such sliding/rolling contacts are not fully understood. In this study, a Mini Traction Machine (MTM) was used to run the experiments using alloy steel balls coated with 15 atomic percent (at. %) hydrogenated DLC (a-C: 15H) rubbing against uncoated cast iron discs. Results showed that the sliding/rolling ratio affects friction, wear and tribochemistry in CI/DLC systems; pure sliding enhances MoDTC activation. MoDTC decomposes to form MoS₂, FeMoO₄ and not MoO₃. In addition, it was observed that MoS2/FeMoO₄ ratio depends on test conditions and affects to the friction performance.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Elsevier Ltd. This is an author produced version of a paper published in Tribology International. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Sliding/rolling; Pure sliding; DLC/Cast iron; MoDTC |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Functional Surfaces (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 22 Feb 2018 16:08 |
Last Modified: | 19 Feb 2019 01:38 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.triboint.2018.02.015 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:127811 |