In-situ formed carbon based composite tribo-film with ultra-high load bearing capacity

Hu, Jiasheng; Zhang, Yujuan; Yang, Guangbin; Gao, Chuanping; Song, Ningning; Zhang, Shengmao; Zhang, Pingyu

doi:10.1016/j.triboint.2020.106577

Cited by 38 publications

(24 citation statements)

References 35 publications

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“…Subsequently, the agglomeration of the nanoparticles occurred during sliding that resulted in a gradual increase in friction coefficient [28]. These aggregated clusters of nanoparticles were then deformed and compacted into a protective film on the sliding surfaces that stabilized the friction curve [25,34].…”

Section: Friction and Wear Of Pao Oil With A Single Additivementioning

confidence: 99%

Synergistic and Competitive Effects between Zinc Dialkyldithiophosphates and Modern Generation of Additives in Engine Oil

Huynh

Pham

2021

Lubricants

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The increasing demand for low-viscosity engine oil has underscored the role of zinc dialkyldithiophosphates (ZDDP) as a conventional anti-wear and antioxidant additive. It is essential to investigate the influence of modern additives such as cyclopropanecarboxylic acid (CPCa) and Ni nanoparticles on the tribological performance of ZDDP for practical commercial oil application. According to the experimental results, Ni nanoparticles formed a protective film that exhibited a synergistic effect with ZDDP. A significantly higher concentration of sulphur in the tribofilm was detected compared to ZDDP by itself, which was responsible for a 27.6% lower wear loss. Meanwhile, a competitive effect between CPCa and ZDDP resulted in a dramatic increase in friction and unstable anti-wear performance. This was demonstrated by a localized formation of the ZDDP tribofilm on the wear surfaces after the friction test. These results have highlighted the synergistic and competitive effects of emerging additives (CPCa and Ni nanoparticles) in the ZDDP tribofilm formation between the sliding steel contacts. This further suggests a new approach to increase the efficiency of ZDDP’s tribological performance at cold start-up processes.

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Section: Friction and Wear Of Pao Oil With A Single Additivementioning

confidence: 99%

Synergistic and Competitive Effects between Zinc Dialkyldithiophosphates and Modern Generation of Additives in Engine Oil

Huynh

Pham

2021

Lubricants

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“…To determine the anti-wear and friction-reducing mechanisms of the PF/BNCs, the XPS spectra (elements C, O, B, N, Fe) of the wear scratches of PF/BNCs before and after heat treatment at 100 °C were investigated (see Figure 11 ). The high-resolution C1s spectrum of the worn surfaces of PF/BNCs is divided into the peaks of C-C (283.7 eV), carbon (284.7 eV), C=C (285.2 eV), C-O (286.4 eV), and C=O (285.7 eV) [ 27 ]. On the other hand, the high-resolution C1s spectrum of the worn surfaces of PF/BNCs heat-treated at 100 °C is divided into the peaks of C=N (285.2 eV), carbon (284.8 eV), C-C/C-H (284.1 eV), carbide (282.8 eV), and other groups (283.4 eV).…”

Section: Resultsmentioning

confidence: 99%

The Preparation and Wear Behaviors of Phenol–Formaldehyde Resin/BN Composite Coatings

et al. 2022

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Phenolic-matrix composites possess excellent synergistic effects on mechanical and tribological properties and can be used in the aerospace, medical, and automobile industries. In this work, a series of phenol–formaldehyde resin/hexagonal boron nitride nanocomposites (PF/BNs) were in situ synthesized using an easy method. PF/BN coatings (PF/BNCs) on 316L steels were prepared through a spin-casting method. The wear behaviors of these PF/BNCs were investigated by dry sliding with steel balls. The percentage of BN, the thickness of the coating, and the heat treatment temperature affected the coefficients of friction (COFs) and wear rates of these coatings. After heat treatment at 100 °C, the tribological properties of the PF/BNCs were remarkably improved, which might be attributed to both the transformation of carbon on the worn surfaces from C-O/C=O into C=N, carbide, and other chemical bonds and the cross-linking of the prepolymers.

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“…The synthesis steps of two kinds of nickel nanoparticles are shown in Scheme . The details about the synthesis of cubic nickel nanoparticles are available in our previous publication . Furthermore, ellipsoidal nickel nanoparticles were prepared by a liquid-phase in situ surface-modification route.…”

Section: Methodsmentioning

confidence: 99%

“…The as-obtained dilute solutions were centrifuged at 5000 rev/min, then their absorbance of the solution after different centrifuged time was tested with an ultraviolet–visible light spectrophotometer (UV–vis; UV-2600) to evaluate the dispersion stability of the nickel nanoparticles in DIOS. The details about the TEM, FTIR, and TGA analyses of cubic nickel nanoparticles are available in ref . Moreover, the hysteresis loops of the cubic and ellipsoidal nickel nanoparticles were tested with a magnetic measurement system (MPMS3) at 300 K.…”

Section: Methodsmentioning

confidence: 99%

“…The details about the synthesis of cubic nickel nanoparticles are available in our previous publication. 15 Furthermore, ellipsoidal nickel nanoparticles were prepared by a liquid-phase in situ surface-modification route. Briefly, 5 mL of 0.1 mol/L nickel formate−oleylamine solution and 5 mL of n-decane (C 10 H 22 , Aladdin) were added to a flask and mixed uniformly to obtain a green transparent solution.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Diisooctyl Sebacate-Containing Nickel Nanoparticles for Lubrication of Steel Sliding Parts under Magnetic Fields

Wang²,

Zhang

et al. 2021

ACS Appl. Nano Mater.

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Cubic and ellipsoidal nickel nanoparticles surface-capped by oleylamine were used as the additives of diisooctyl sebacate (DIOS) to achieve boundary lubrication of a bearing steel sliding pair. The microstructure, composition, and chemical state of the tribo-films formed on the worn surfaces of the steel blocks lubricated with DISO–Ni nanoparticles were analyzed by X-ray photoelectron spectroscopy, energy-dispersive spectrometry, transmission electron microscopy, and Raman spectroscopy. The findings indicated that both the cubic and ellipsoidal nickel nanoparticles can form in situ repair tribo-films on rubbed steel surfaces under the manipulation of an external magnetic field, which is due to the enhanced adsorption and deposition upon applying a magnetic field. In the meantime, the two kinds of nickel nanoparticles undergo tribochemical reaction during the friction process and catalyze the carbonization of DIOS to form amorphous carbon. The as-generated amorphous carbon is chemically bonded with nickel and nickel oxide nanocrystals to form the in situ repair tribo-film. The as-formed tribo-film composed of a nanocrystal layer, an amorphous carbon layer, and a composite layer consisting of carbon embedded around nickel nanocrystals contributes to the wear reduction of the steel–steel sliding pair under boundary lubrication conditions.

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In-situ formed carbon based composite tribo-film with ultra-high load bearing capacity

Cited by 38 publications

References 35 publications

Synergistic and Competitive Effects between Zinc Dialkyldithiophosphates and Modern Generation of Additives in Engine Oil

Synergistic and Competitive Effects between Zinc Dialkyldithiophosphates and Modern Generation of Additives in Engine Oil

The Preparation and Wear Behaviors of Phenol–Formaldehyde Resin/BN Composite Coatings

Diisooctyl Sebacate-Containing Nickel Nanoparticles for Lubrication of Steel Sliding Parts under Magnetic Fields

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