Wear penalty for steel rubbing against hard coatings in reactive lubricants due to tribochemical interactions
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
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
Similar Records
Optimum Me-DLC coatings and hard coatings for tribological performance[Diamond-Like Carbon]
Tribological behavior of N-doped ZnO thin films by metal organic chemical vapor deposition under lubricated contacts