The influence of contact conditions on surface reaction layers formed between steel surfaces lubricated by an aviation oil

Wang, L. and Wood, R.J.K. (2007) The influence of contact conditions on surface reaction layers formed between steel surfaces lubricated by an aviation oil. Tribology International, 40, (10-12), 1655-1666. (doi:10.1016/j.triboint.2007.02.014).


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This study focuses on the influence of load and temperature on the formation and stability of tribo-films for bearing steel on bearing steel contacts lubricated with an aviation oil, EXXON Turbo 2380 (TCP based - tricresyl phosphate) at ambient temperatures. Experiments were carried out on a pin-on-disc (POD) tribometer (with a ball-on-flat geometry) under an average loading rate of 0.17 N s?1 and sliding speed of 3 m s?1. The X-ray photoelectron spectroscopy (XPS) analysis on the worn surfaces of ball and disc shows that a tribo-film forms on both surfaces at room temperature. The formation and removal of the tribo-film are faster on the ball due to the nature of contact between the ball and disc. It was found that the tribo-films formed at room temperature are vulnerable to initial disc temperature. The higher the initial temperature the higher the load carrying capacity. The tribo-film growth and contact deterioration have been monitored by acoustic emission (AE) and electrostatic charge (ESP) sensing systems in real time. The results show that both AE and ESP can detect the tribo-film and contact breakdown and have great potential for on-line condition monitoring of lubricated tribo-contacts.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.triboint.2007.02.014
Additional Information: Tribology at the Interface: Proceedings of the 33rd Leeds-Lyon Symposium on Tribology (Leeds, 2006).
ISSNs: 0301-679X (print)
Related URLs:
Keywords: tricresyl phosphate, tribo-film, aviation oils, condition monitoring, acoustic emission, electrostatic sensing
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions : University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 48033
Accepted Date and Publication Date:
October 2007Published
8 November 2006Submitted
Date Deposited: 24 Aug 2007
Last Modified: 31 Mar 2016 12:24

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