Tribological behavior of plasma-sprayed metal based solid self-lubricating coatings under heavy load

Metal based solid self-lubricating coating is an important way to reduce the wear of friction pair and has been widely employed in several friction conditions. However, its application in some extreme environments especially under heavy load condition is still insufficient. In this study, the tribol...

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Bibliographic Details
Published in:Wear 2021-12, Vol.486-487, p.204108, Article 204108
Main Authors: Liu, N., Liu, Q., Li, Z., Bai, Y., Sun, Y.W., Li, Z.D., Bao, M.Y., Zhan, H., Guo, D.G., Ma, Y.S.
Format: Article
Language:English
Subjects:
Abrasive wear
Coefficient of friction
Copper
Extreme environments
Fracture toughness
Friction
Friction and wear
Heavy load condition
Mechanical properties
Molybdenum disulfide
Nickel
Plasticity
Protective coatings
Self lubricating materials
Self lubrication
Self-lubricating coating
Tin bronzes
Tribological properties
Tribology
Wear mechanisms
Wear rate
Wear resistance
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Summary:Metal based solid self-lubricating coating is an important way to reduce the wear of friction pair and has been widely employed in several friction conditions. However, its application in some extreme environments especially under heavy load condition is still insufficient. In this study, the tribological behavior and wear mechanism of three typical metal based solid self-lubricating coatings such as Ni-graphite (Ni-G), Ni-MoS2 and tin bronze (Cu-Sn) were comparatively studied by a pin-on-disk wear test against 1Cr15Ni4Mo3N steel counterpart coated with NiCr-Cr3C2 under the load up to 52 MPa. The results showed that under heavy load condition, the failure of Ni-G or Ni-MoS2 coating was related to abrasive and delamination, while the predominant wear mechanism of Cu-Sn coating was adhesion. The Ni-G coating and Cu-Sn coating displayed the lowest coefficient of friction and the lowest wear rate, respectively. The wear resistance of coating was highly dependent on mechanical properties. Particularly, plasticity and toughness should be given more attention when tailoring metal based solid self-lubricating coating under heavy load condition. •The tribological behavior of three self-lubricating coatings under heavy load condition were studied.•Both H/E and H3/E2 were negative correlated with wear resistance in this study.•Plasticity and toughness significantly affect the wear rate of coating under heavy load.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2021.204108