Details
| Original language | English |
|---|---|
| Pages (from-to) | 1013-1017 |
| Number of pages | 5 |
| Journal | Industrial Lubrication and Tribology |
| Volume | 72 |
| Issue number | 8 |
| Early online date | 24 Feb 2020 |
| Publication status | Published - 16 Oct 2020 |
Abstract
Purpose: The structure and chemical composition of boundary layers built under tribological stress affect the friction and wear of solid-state surfaces in a major way. Therefore, information about the chemical composition of the outermost surface and boundary layer are of great importance. Preliminary time of flight secondary ion mass spectrometry (ToF-SIMS) investigations have shown that metal surfaces that have been immersed at high temperatures in phosphonium phosphate-containing oils contain at least some characteristic signals for phosphate containing anti-wear layers. The purpose of this work is to investigate the influence of additive concentration and oil temperature on the formation of phosphate containing layers. Design/methodology/approach: To investigate the formation of phosphate containing layers as a function of temperature, samples of rolling bearing steel 100Cr6 were first heated in a furnace to selected temperatures of 200, 300, 400 and 500 °C, respectively. Then, they were immersed in a model fluid containing ionic liquids as additive in PAO-2 and analysed by ToF-SIMS. Findings: 100Cr6 surfaces immersed in trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate additive oil show characteristic signals of phosphate-like layers at temperatures of 400-500 °C. In addition, characteristic surface signals show a decrease in these ionic liquids at these temperatures. Originality/value: Ionic liquids could be an alternative to zinc dialkyldithiophosphates as an oil additive. Targeted investigations under friction load could provide information on whether wear-reducing layers are formed. Peer review: The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2019-0436
Keywords
- Anti-wear, Boundary layers, Ionic liquids, ToF-SIMS, Tribology
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Energy(all)
- General Energy
- Materials Science(all)
- Surfaces, Coatings and Films
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In: Industrial Lubrication and Tribology, Vol. 72, No. 8, 16.10.2020, p. 1013-1017.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - ToF-SIMS analysis of boundary layers formed under zinc-free antiwear
AU - Mallach, Dennis
AU - Pape, Florian
AU - Lipinsky, Dieter
AU - Arlinghaus, Heinrich F.
PY - 2020/10/16
Y1 - 2020/10/16
N2 - Purpose: The structure and chemical composition of boundary layers built under tribological stress affect the friction and wear of solid-state surfaces in a major way. Therefore, information about the chemical composition of the outermost surface and boundary layer are of great importance. Preliminary time of flight secondary ion mass spectrometry (ToF-SIMS) investigations have shown that metal surfaces that have been immersed at high temperatures in phosphonium phosphate-containing oils contain at least some characteristic signals for phosphate containing anti-wear layers. The purpose of this work is to investigate the influence of additive concentration and oil temperature on the formation of phosphate containing layers. Design/methodology/approach: To investigate the formation of phosphate containing layers as a function of temperature, samples of rolling bearing steel 100Cr6 were first heated in a furnace to selected temperatures of 200, 300, 400 and 500 °C, respectively. Then, they were immersed in a model fluid containing ionic liquids as additive in PAO-2 and analysed by ToF-SIMS. Findings: 100Cr6 surfaces immersed in trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate additive oil show characteristic signals of phosphate-like layers at temperatures of 400-500 °C. In addition, characteristic surface signals show a decrease in these ionic liquids at these temperatures. Originality/value: Ionic liquids could be an alternative to zinc dialkyldithiophosphates as an oil additive. Targeted investigations under friction load could provide information on whether wear-reducing layers are formed. Peer review: The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2019-0436
AB - Purpose: The structure and chemical composition of boundary layers built under tribological stress affect the friction and wear of solid-state surfaces in a major way. Therefore, information about the chemical composition of the outermost surface and boundary layer are of great importance. Preliminary time of flight secondary ion mass spectrometry (ToF-SIMS) investigations have shown that metal surfaces that have been immersed at high temperatures in phosphonium phosphate-containing oils contain at least some characteristic signals for phosphate containing anti-wear layers. The purpose of this work is to investigate the influence of additive concentration and oil temperature on the formation of phosphate containing layers. Design/methodology/approach: To investigate the formation of phosphate containing layers as a function of temperature, samples of rolling bearing steel 100Cr6 were first heated in a furnace to selected temperatures of 200, 300, 400 and 500 °C, respectively. Then, they were immersed in a model fluid containing ionic liquids as additive in PAO-2 and analysed by ToF-SIMS. Findings: 100Cr6 surfaces immersed in trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate additive oil show characteristic signals of phosphate-like layers at temperatures of 400-500 °C. In addition, characteristic surface signals show a decrease in these ionic liquids at these temperatures. Originality/value: Ionic liquids could be an alternative to zinc dialkyldithiophosphates as an oil additive. Targeted investigations under friction load could provide information on whether wear-reducing layers are formed. Peer review: The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2019-0436
KW - Anti-wear
KW - Boundary layers
KW - Ionic liquids
KW - ToF-SIMS
KW - Tribology
UR - http://www.scopus.com/inward/record.url?scp=85079781529&partnerID=8YFLogxK
U2 - 10.1108/ilt-10-2019-0436
DO - 10.1108/ilt-10-2019-0436
M3 - Article
AN - SCOPUS:85079781529
VL - 72
SP - 1013
EP - 1017
JO - Industrial Lubrication and Tribology
JF - Industrial Lubrication and Tribology
SN - 0036-8792
IS - 8
ER -