Superlubricity achieved with TiN coatings via the in situ formation of a carbon-based film at the sliding interfaces

Fu, Xiaojing; Cao, Lei; Wan, Yong; Li, Ruichuan

doi:10.1016/j.ceramint.2021.08.229

Cited by 24 publications

(12 citation statements)

References 20 publications

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“…The pioneering research of forming carbon-based materials in situ was conducted by Erdemir et al [36], where amorphous carbon and onion-like carbon were formed from the polyalphaolefin oil by nanocrystalline catalytic coatings. In the following year, the use of oil-soluble carbon-precursor additives, e.g., cyclopropanecarboxylic acid (CPCa), was conducted to form polymeric amorphous carbon-based tribofilms [34,[37][38][39][40]. Currently, the use of catalytically active nanoparticles was also proposed to control the formation of amorphous carbon-based tribofilms [41,42].…”

Section: Introductionmentioning

confidence: 99%

Tribocatalysis Induced Carbon-Based Tribofilms—An Emerging Tribological Approach for Sustainable Lubrications

2023

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To comply with the high demand for efficient and sustainable lubrications, carbon-based tribofilms and/or nanomaterials have emerged as a potential solution that can resolve the current major shortcomings of phosphorus- and sulphur-rich tribofilms and protective coatings. Although their employment is still in the early stages of realization and research, these tribofilms receive significant interest due to their capability to continuously and in situ repair/replenish themselves during sliding, which has been an ultimate goal of all moving mechanical systems. Structurally, these tribofilms are complex and predominantly amorphous or disordered with/without graphitic domains (e.g., graphene/graphite, onion-like carbon, etc.). Chemically, the compositions of these tribofilms vary significantly with environments, conditions, and material precursors. Yet, the structural properties of carbon-based tribofilms remain largely ambiguous, which precludes a full understanding of the mechanisms underlying the formation and lubrication performance. This review will summarize the current state-of-art research about the in situ carbon-based tribofilms that have been published since the pioneering works. Particularly, this work will highlight the recent approaches to generate these tribofilms, their associated lubrication performance, current understanding of the formation mechanics, common analytical approaches for these tribofilms, and the compatibility of these tribofilms with other additives. Together, the overall outlooks will be drawn, demonstrating the knowledge gaps and proposing further investigation tactics to tackle these emerging issues.

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Section: Introductionmentioning

confidence: 99%

Tribocatalysis Induced Carbon-Based Tribofilms—An Emerging Tribological Approach for Sustainable Lubrications

2023

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“…The COF values of (a) steel–steel tribopairs and (b) steel–DLC tribopairs lubricated via PAO base oil and oils containing BP and oBP. (c) The optical images and (d) 3D white-light morphology of the ball wear scar area, (e) A comparison of the contact pressure between this study and other oil lubrication systems in a superlubricity state. − …”

Section: The Active Oxidation Of the Bp Nanopowdersmentioning

confidence: 99%

Self-Adaptive Macroscale Superlubricity Based on the Tribocatalytic Properties of Partially Oxidized Black Phosphorus

et al. 2023

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The high-flash heat generated by direct contact at asperity tips under high contact stress and shear significantly promotes the tribocatalytic reaction between a lubricating medium and a friction interface. Macroscale superlubricity can be achieved by using additives with good lubrication properties to promote the decomposition and transformation of a lubricating medium to form an ultralow shear interface during the friction process. This paper proposed a way to achieve self-adaptive oil-based macroscale superlubricity on different tribopairs, including steel−steel and steel−DLC (diamond-like carbon), which is based on the excellent lubricating performance of black phosphorus with active oxidation and the catalytic cleavage behavior of oil molecules on the surface of oBP. This work potentially expands the industrial application of superlubricity.

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“…Magnetron sputtering technology was used to deposit a layer of titanium on the Al samples. 29 When the air pressure in the working chamber is pumped to less than 5 × 10 −3 pa, high-purity argon (60SCCM) was introduced to maintain the pressure at 0.5 pa. Ti film was then deposited for 3.5 h by setting the working current of 7A and the bias voltage −50 V. As shown in Figure 1, Ti film is complete, uniform, and dense, well bonded to the Al substrate. The thickness of Ti film is 711 nm.…”

Section: Preparation Of Ti Film On Al Substratementioning

confidence: 99%

Improvement in corrosion resistance of micro‐arc oxidation coating on PVD Ti‐coated aluminum alloy 7075

Liu

Gao²,

Tong

et al. 2022

Int J Applied Ceramic Tech

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Surface treatments are always needed to enhance corrosion-resistant performance of aluminum (Al) alloys when they are used in seawater environments. The paper aimed to prepare the composite oxide ceramic coating on Al alloy 7075 by combining micro-arc oxidation (MAO) and magnetron sputtering technology. The Al substrate was precoated with titanium (Ti) layer by using the magnetron sputtering technology and then treated by MAO in the alkaline aluminate electrolyte, resulting in a composite MAO coating, which is composed of Al 2 O 3 and TiO 2 along with the complex oxide (Al 2 TiO 5 ). The potentiodynamic polarization and electrochemical impedance spectroscopy were carried out to evaluate the corrosion performance of the MAO coatings in 3.5 wt% NaCl solution. Better corrosion resistance was observed for composite oxide coating than the reference MAO coating on the bare Al, as evidenced by the higher corrosion potential of −0.664 V versus Ag/AgCl and the lower corrosion current density of 4.41 × 10 -6 A/cm 2 .

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Superlubricity achieved with TiN coatings via the in situ formation of a carbon-based film at the sliding interfaces

Cited by 24 publications

References 20 publications

Tribocatalysis Induced Carbon-Based Tribofilms—An Emerging Tribological Approach for Sustainable Lubrications

Tribocatalysis Induced Carbon-Based Tribofilms—An Emerging Tribological Approach for Sustainable Lubrications

Self-Adaptive Macroscale Superlubricity Based on the Tribocatalytic Properties of Partially Oxidized Black Phosphorus

Improvement in corrosion resistance of micro‐arc oxidation coating on PVD Ti‐coated aluminum alloy 7075

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