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The W-cluster reactive sites interaction model for WDLC coatings with ionic liquids
ID
Arshad, Muhammad Shahid
(
Author
),
ID
Čoga, Lucija
(
Author
),
ID
Geue, Thomas M.
(
Author
),
ID
Kovač, Janez
(
Author
),
ID
Cruz, Sandra M.A.
(
Author
),
ID
Kalin, Mitjan
(
Author
)
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https://www.sciencedirect.com/science/article/pii/S0301679X23003377
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Abstract
This study investigates the use of 1,3-dimethylimidazolium dimethylphosphate ionic liquid (IL) additive in glycerol base oil for improving the lubrication-properties of tungsten-doped diamond-like carbon (WDLC) coatings. Tribological tests were conducted at various applied loads (5 N, 10 N, 20 N) and elevated temperature (100 °C), and the addition of 1 wt% of IL resulted in a significant reduction (∼50%) in friction-coefficient. In-situ neutron-reflectometry analysis revealed a multi-step tribofilm formation mechanism involving IL and W-clusters, resulting in the formation of a 1.24-nm thick tribofilm on the WDLC surface within the first 30-minutes of the friction experiment. The reaction kinetics for tribofilm formation are discussed involving dissociation of dimethylphosphate into dioxo-phosphate, which interacts with W-clusters to form tungsten phosphates and cations adsorbed on their surface.
Language:
English
Keywords:
W-doping DLC coatings
,
ionic-liquid
,
friction
,
neutron reflectometry
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
Publication status:
Published
Publication version:
Version of Record
Year:
2023
Number of pages:
11 str.
Numbering:
Vol. 185, art. 108550
PID:
20.500.12556/RUL-145655
UDC:
539.92
ISSN on article:
0301-679X
DOI:
10.1016/j.triboint.2023.108550
COBISS.SI-ID:
150840579
Publication date in RUL:
04.05.2023
Views:
734
Downloads:
90
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Record is a part of a journal
Title:
Tribology international
Shortened title:
Tribol. int.
Publisher:
Elsevier
ISSN:
0301-679X
COBISS.SI-ID:
26558976
Licences
License:
CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:
The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Secondary language
Language:
Slovenian
Keywords:
W-doping DLC premazi
,
ionska tekočina
,
trenje
,
nevtronska reflektometrija
Projects
Funder:
EC - European Commission
Funding programme:
H2020
Project number:
685451
Name:
ERA-NET for materials research and innovation
Acronym:
M-ERA.NET 2
Funder:
EC - European Commission
Funding programme:
M-ERA.NET 2
Project number:
M-ERA-NET2/0014/2016
Acronym:
GreenCOAT
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0231
Name:
Tribologija
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