NDLI: Modelling Tribochemical Reactions of Additives by Gas-Phase Lubrication

Content Provider	Springer Nature Link
Author	Boehm, Matthieu Martin, Jean Michel Grossiord, Carol Le Mogne, Thierry
Copyright Year	2001
Abstract	In the context of boundary lubrication, we are interested in interactions between lubricant additives as well as in the role of nascent surfaces formed during friction. Tribochemical reactions are very complex and their study requires simplified approaches. We have developed an analytical ultrahigh vacuum tribotester with the possibility of introducing low-molecular-weight molecules during (or before) a friction test, in order to simulate heavy lubricant components by means of their chemical functional group. Mixtures of gases can also be studied with this apparatus. In situ AES/XPS (depth profiling) is available at the end of the friction test. This permits the characterisation of the two friction counterfaces to be performed accurately. Results show that friction under gaseous feeds can be well related to lubricated tests, both in friction behaviour and in wear track and debris morphologies. The evolution of friction in the presence of pressures of selected gases (O$_{2}$, hexane, hexene and hexanol) shows clear differentiation of the different cases as a function of chemical group. Finally we show that the method is well adapted to model some aspects of boundary lubrication. It can be used as a powerful tool to predict and understand mechanisms of action of individual additives as well as interactions between additives in oil formulations.
Starting Page	83
Ending Page	90
Page Count	8
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	11
Issue Number	2
e-ISSN	15732711
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2001-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Surfaces and Interfaces, Thin Films Mechanics
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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