Correlating mechanical properties and anti-wear performance of tribofilms formed by ionic liquids, ZDDP and their combinations
Abstract
Here we examine the elasticity, hardness, and resistance-to-plastic-deformation (P/S2) measured via nanoindentation of several tribofilms and correlates these properties to friction and wear behavior. The tribofilms were generated by ball-on-plate reciprocating sliding lubricated by a base oil containing an ionic liquid, phosphonium-organophosphate or ammonium-organophosphate, zinc dialkyldithiophosphate (ZDDP), or combination of IL and ZDDP. Nanoindentation was conducted at room and elevated temperatures. While there seems little correlation between the tribofilm hardness and tribological behavior, a higher modulus generally leads to better friction and wear performance. Interestingly, a lower P/S2 ratio tends to reduce friction and improve wear protection, which is in an opposite trend as reported for bulk materials. Ultimately, this is likely attributable to the dynamic, self-healing characteristics of tribofilms.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS); USDOE Office of Science (SC), Office of Workforce Development for Teachers & Scientists (WDTS)
- OSTI Identifier:
- 1247932
- Alternate Identifier(s):
- OSTI ID: 1359969
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Wear
- Additional Journal Information:
- Journal Volume: 354-355; Journal Issue: C; Journal ID: ISSN 0043-1648
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; nanoindentation; ionic liquid; ZDDP; tribofilm; hardness; resistance-to-plastic-deformation
Citation Formats
Landauer, Alexander K., Barnhill, William C., and Qu, Jun. Correlating mechanical properties and anti-wear performance of tribofilms formed by ionic liquids, ZDDP and their combinations. United States: N. p., 2016.
Web. doi:10.1016/j.wear.2016.03.003.
Landauer, Alexander K., Barnhill, William C., & Qu, Jun. Correlating mechanical properties and anti-wear performance of tribofilms formed by ionic liquids, ZDDP and their combinations. United States. https://doi.org/10.1016/j.wear.2016.03.003
Landauer, Alexander K., Barnhill, William C., and Qu, Jun. Thu .
"Correlating mechanical properties and anti-wear performance of tribofilms formed by ionic liquids, ZDDP and their combinations". United States. https://doi.org/10.1016/j.wear.2016.03.003. https://www.osti.gov/servlets/purl/1247932.
@article{osti_1247932,
title = {Correlating mechanical properties and anti-wear performance of tribofilms formed by ionic liquids, ZDDP and their combinations},
author = {Landauer, Alexander K. and Barnhill, William C. and Qu, Jun},
abstractNote = {Here we examine the elasticity, hardness, and resistance-to-plastic-deformation (P/S2) measured via nanoindentation of several tribofilms and correlates these properties to friction and wear behavior. The tribofilms were generated by ball-on-plate reciprocating sliding lubricated by a base oil containing an ionic liquid, phosphonium-organophosphate or ammonium-organophosphate, zinc dialkyldithiophosphate (ZDDP), or combination of IL and ZDDP. Nanoindentation was conducted at room and elevated temperatures. While there seems little correlation between the tribofilm hardness and tribological behavior, a higher modulus generally leads to better friction and wear performance. Interestingly, a lower P/S2 ratio tends to reduce friction and improve wear protection, which is in an opposite trend as reported for bulk materials. Ultimately, this is likely attributable to the dynamic, self-healing characteristics of tribofilms.},
doi = {10.1016/j.wear.2016.03.003},
journal = {Wear},
number = C,
volume = 354-355,
place = {United States},
year = {Thu Mar 10 00:00:00 EST 2016},
month = {Thu Mar 10 00:00:00 EST 2016}
}
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Works referencing / citing this record:
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