Friction and wear performance of diamond-like carbon and Cr-doped diamond-like carbon coatings in contact with steel surfaces

Author(s):  
H Renondeau ◽  
R I Taylor ◽  
G C Smith ◽  
A A Torrance
2017 ◽  
Vol 4 (1) ◽  
pp. 015602 ◽  
Author(s):  
Shenjiang Wu ◽  
Hiroyuki Kousaka ◽  
Satyananda Kar ◽  
Dangjuan Li ◽  
Junhong Su

1994 ◽  
Vol 3 (1-2) ◽  
pp. 119-125 ◽  
Author(s):  
A. Erdemir ◽  
F.A. Nichols ◽  
X.Z. Pan ◽  
R. Wei ◽  
P. Wilbur

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
Cayetano Espejo ◽  
Benoît Thiébaut ◽  
Frédéric Jarnias ◽  
Chun Wang ◽  
Anne Neville ◽  
...  

This work focuses on the tribochemistry of molybdenum dithiocarbamate (MoDTC) oil additive to improve friction behavior of diamond-like-carbon (DLC) coated systems lubricated in boundary regime. Raman microscopy has been used to investigate surface tribolayers formed on coated (hydrogenated a-C:H and non-hydrogenated ta-C) and steel surfaces when lubricated with model lubricants and commercial engine oils. The effect of the additive package and the type of DLC played a crucial role in the development and composition of the tribolayer and the friction performance. The additive package contained in the fully formulated (FF) oils limited the friction reduction capabilities of MoDTC additive for every material pair. Accelerated a-C:H coating wear related to MoDTC tribochemistry was found. For the first time, it has been shown that a distinctive MoS2-containing tribolayer can be formed on the ta-C surface, leading to a coefficient of friction lower than 0.04. The underlying mechanisms of MoDTC/surface interactions and their effect on friction and wear are discussed.


2002 ◽  
Author(s):  
Andriy Kovalchenko ◽  
Oyelayo O. Ajayi ◽  
Ali Erdemir ◽  
George R. Fenske

1999 ◽  
Vol 120-121 ◽  
pp. 589-593 ◽  
Author(s):  
A. Erdemir ◽  
I.B. Nilufer ◽  
O.L. Eryilmaz ◽  
M. Beschliesser ◽  
G.R. Fenske

2019 ◽  
Vol 357 ◽  
pp. 1048-1059 ◽  
Author(s):  
M. Prieske ◽  
H. Hasselbruch ◽  
A. Mehner ◽  
F. Vollertsen

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Valentin R. Salinas Ruiz ◽  
Takuya Kuwahara ◽  
Jules Galipaud ◽  
Karine Masenelli-Varlot ◽  
Mohamed Ben Hassine ◽  
...  

AbstractFriction and wear reduction by diamond-like carbon (DLC) in automotive applications can be affected by zinc-dialkyldithiophosphate (ZDDP), which is widely used in engine oils. Our experiments show that DLC’s tribological behaviour in ZDDP-additivated oils can be optimised by tailoring its stiffness, surface nano-topography and hydrogen content. An optimal combination of ultralow friction and negligible wear is achieved using hydrogen-free tetrahedral amorphous carbon (ta-C) with moderate hardness. Softer coatings exhibit similarly low wear and thin ZDDP-derived patchy tribofilms but higher friction. Conversely, harder ta-Cs undergo severe wear and sub-surface sulphur contamination. Contact-mechanics and quantum-chemical simulations reveal that shear combined with the high local contact pressure caused by the contact stiffness and average surface slope of hard ta-Cs favour ZDDP fragmentation and sulphur release. In absence of hydrogen, this is followed by local surface cold welding and sub-surface mechanical mixing of sulphur resulting in a decrease of yield stress and wear.


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