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Wear penalty for steel rubbing against hard coatings in reactive lubricants due to tribochemical interactions

Journal Article · · Tribology International

Hard coatings and surface adsorptive/reactive lubricants are two common strategies for improving wear protection, but what if they are used together? In this study, steel-steel and steel-coating sliding was investigated in boundary lubrication of polar and non-polar oils containing a ZDDP or an ionic liquid. Two hard coatings, diamond-like-carbon (DLC) and chromium nitride (CrN), were used. Furthermore, for a steel-steel contact, wear was effectively reduced by using a more surface reactive lubricant, as expected. However, the steel ball wear was increased against a hard coating and further worsened with a more polar oil and/or a more surface reactive additive. The wear mechanism is proposed as a combined effect of physicochemical interactions with the lubricant, mechanical polishing by the counterface, and material adhesion.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1798606
Alternate ID(s):
OSTI ID: 1782378
Journal Information:
Tribology International, Journal Name: Tribology International Vol. 160; ISSN 0301-679X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (25)

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