Effect of liquid crystal polymer micro-bump structure prepared by mesh method on the frictional corrosion performance of micro-arc oxide coated pure aluminum disks

Chai, Guiquan; Lu, Hailin; Xue, Bowen; Jia, Endong; Yang, Huiyun; Wang, Changkai

doi:10.1016/j.surfcoat.2022.128748

Cited by 29 publications

(5 citation statements)

References 24 publications

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“…In the friction test on the 1400 Hz sample, it can be clearly observed that there are a large number of irregularly fitted furrows on the sphere, indicating that the wear that occurs on the friction partner is mainly abrasive wear. Observing the wear traces on the 1400 Hz sample, the wear on the 1400 Hz sample is dominated by adhesive wear. , The wear is most severe in dry friction, and when lubricant is added, the wear marks are reduced. However, when water is added as a lubricant, the wear width of the 1400 Hz sample increases.…”

Section: Resultsmentioning

confidence: 98%

“…Observing the wear traces on the 1400 Hz sample, the wear on the 1400 Hz sample is dominated by adhesive wear. 43,51 The wear is most severe in dry friction, and when lubricant is added, the wear marks are reduced. However, when water is added as a lubricant, the wear width of the 1400 Hz sample increases.…”

Section: Lubrication Effect Of Different Lubricating Mediamentioning

confidence: 99%

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Effect of Treatment with Microarc Oxidation Technology on Tribological Properties of Nonvalve Metal Low-Carbon Steel

Cheng,

Lu,

Dai

et al. 2024

Langmuir

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Section: Resultsmentioning

confidence: 98%

Section: Lubrication Effect Of Different Lubricating Mediamentioning

confidence: 99%

Effect of Treatment with Microarc Oxidation Technology on Tribological Properties of Nonvalve Metal Low-Carbon Steel

Cheng,

Lu,

Dai

et al. 2024

Langmuir

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“…Specifically, as shown in Figure 11a, the peaks of Al 2p on both lubricated surfaces indicate the presence of oxide (Al 2 O 3 ) as well as Al monomers inherent in the material itself. However, under oil lubrication conditions, the worn surface generates AlO (OH) (corresponding to 76.59 eV) due to the presence of OH-ions [27,28]. In Figure 11b, the substances generated by Fe 2p under both lubrication conditions are mainly Fe 2 O 3 and Fe 3 O 4 , while there is also the presence of FeS (713.06 eV and 71.54 eV) as well as Fe monomers (718.04 eV) under oil lubrication conditions.…”

Section: Wear Mechanismmentioning

confidence: 99%

Effect of Ultrasonic Surface Rolling on the Fretting Wear Property of 7075 Aluminum Alloy

Xiong,

Zhang,

Zhai

et al. 2023

Metals

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This paper investigates the effect of ultrasonic surface rolling (USR) on the fretting wear properties of the 7075 aluminum alloy. A white light interferometer, Vickers hardness tester, and X-ray diffractometer were employed to comparatively analyze the variations in surface roughness, hardness. and grain size before and after the USR treatment. The fretting tests were carried out under oil lubricated and dry fretting conditions, using a ball-on-flat contact tangential fretting tester. The worn surface morphology, wear debris, and chemical composition were analyzed using an optical microscope (OM), a scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS), etc. The results revealed that after USR treatment, the surface roughness was reduced by 90%, the hardness was increased by 13HV, and the grains were refined. Moreover, the wear was reduced under oil lubrication conditions but increased under dry fretting conditions. It can be concluded that the microstructure and mechanical properties of the 7075 aluminum alloy surface can be enhanced by the USR treatment. The improved fretting performance in oil should be attributed to the increased surface hardness, which helps reduce abrasive wear and plastic deformation. However, under dry fretting conditions, the wear was increased due to the presence of hard debris particles that peel off from the USR-treated surface, leading to aggravated abrasion.

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“…PTFE is considered an important material for combating corrosion 21,22 . The surface of MAO coating contains tiny micro‐pores, which partly explains its high friction coefficient 23,24 . The use of PTFE powder to fill the micro‐pores on the surface of MAO coating, so as to achieve the purpose of reducing the friction coefficient of the coating surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of current density and polytetrafluoroethylene on the properties of micro‐arc oxide coating of pure aluminum

Chen

Xu³

et al. 2023

Int J Applied Ceramic Tech

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Micro-arc oxidation (MAO) is a surface treatment technology that enhances the surface properties of valves by creating a ceramic oxide layer on the metal surface. The goal of this study is to investigate the influence of current density on the properties of aluminum coatings during preparation and to improve the tribological properties of MAO/PTFE self-lubricating films on the coating surface. The characterization of the coating was performed using X-ray photoelectron spectroscopy, X-ray diffraction, Raman spectra, and energy dispersive spectroscopy. The roughness, hardness, and elastic modulus of the coatings were tested using atomic force microscopy and nanoindentation. Tribological experiments were conducted to evaluate the tribological properties of the coatings.The experimental results show that the friction coefficient (COF), roughness, hardness, and elastic modulus of the MAO coating increase with the increase of current density. Additionally, the friction coefficient of the MAO composite coating significantly decreases after the addition of polytetrafluoroethylene (PTFE), improving the service life and application range of the metal coating.These findings are expected to promote the development of valve metal in various application fields.

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Effect of liquid crystal polymer micro-bump structure prepared by mesh method on the frictional corrosion performance of micro-arc oxide coated pure aluminum disks

Cited by 29 publications

References 24 publications

Effect of Treatment with Microarc Oxidation Technology on Tribological Properties of Nonvalve Metal Low-Carbon Steel

Effect of Treatment with Microarc Oxidation Technology on Tribological Properties of Nonvalve Metal Low-Carbon Steel

Effect of Ultrasonic Surface Rolling on the Fretting Wear Property of 7075 Aluminum Alloy

Effect of current density and polytetrafluoroethylene on the properties of micro‐arc oxide coating of pure aluminum

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