Tribological Properties of Magnesium Ion-exchanged α-Zirconium Phosphate as a Solid Lubricant Additive in Lithium Grease

Purpose The purpose of this paper is to study the tribological properties of (C9H8N)4(H2O)4[Zr8P12O40(OH)8F8] (designated as ZrPOF-Q1) used as an additive in lithium grease. Design/methodology/approach The tribological properties of ZrPOF-Q1 as an additive in the lithium grease were evaluated with a four-ball tester. To understand the lubrication mechanism, post-test characterization of the contact tracks was performed via three-dimensional (3D) optical profiler, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Findings The results reveal that ZrPOF-Q1 exhibits good performance in anti-wear, friction-reducing and load-carrying capacity. The action mechanism is estimated through analysis of the worn surface with SEM, EDS and 3D. The results indicate that ZrPOF-Q1 can adhere on the substrate, protecting the rubbed surfaces from a direct contact, even under high load for a long-time test. ZrPOF-Q1 can adhere on the substrate, protecting the rubbed surfaces from a direct contact, even under high load for a long-time test. Originality/value This work illustrates that ZrPOF-Q1 as an additive can improve lubricating performance. These tribological properties make ZrPOF-Q1 a promising candidate for lubricant additive.

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Tribological Properties of Layered a-Zirconium Phosphate as Lithium Grease Additive

Asian Journal of Chemistry ◽

10.14233/ajchem.2015.18474 ◽

2015 ◽

Vol 27 (3) ◽

pp. 1133-1137 ◽

Cited By ~ 1

Author(s):

Huijuan Ma ◽

Xiaosheng Zhang ◽

Hong Xu

Keyword(s):

Tribological Properties ◽

Zirconium Phosphate ◽

Lithium Grease

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Tribological Properties of Al2O3 Nanoparticles as Lithium Grease Additives

Lubricants ◽

10.3390/lubricants9010009 ◽

2021 ◽

Vol 9 (1) ◽

pp. 9

Author(s):

Ahmed Nabhan ◽

Ahmed Rashed ◽

Nouby M. Ghazaly ◽

Jamil Abdo ◽

M. Danish Haneef

Keyword(s):

Tribological Properties ◽

Wear Scar ◽

Al2o3 Nanoparticles ◽

Lithium Grease ◽

Pin On Disc ◽

Scar Width

The tribological properties of Lithium grease specimens with different concentrations of Al2O3 nanoparticles were investigated using a pin on disc apparatus under different sliding speeds and normal loads. Results showed that Al2O3 nanoparticles enhanced the tribological properties of lithium grease and reduced the COF and wear scar width by approximately 57.9% and 47.5% respectively.

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Tribological properties of the epoxy resin-based solid lubricant coating modified by Kevlar fibers

Industrial Lubrication and Tribology ◽

10.1108/ilt-09-2017-0259 ◽

2018 ◽

Vol 70 (9) ◽

pp. 1706-1713 ◽

Cited By ~ 2

Author(s):

Guotao Zhang ◽

Yanguo Yin ◽

Ting Xie ◽

Dan Li ◽

Ming Xu ◽

...

Keyword(s):

Wear Resistance ◽

Epoxy Resin ◽

Tribological Properties ◽

Dry Friction ◽

Friction And Wear ◽

Solid Lubricant ◽

Transfer Film ◽

Wear Properties ◽

Content Type ◽

Friction And Wear Properties

Purpose This paper aims to obtain high mechanical and good tribological properties of epoxy resin-based coatings under dry friction conditions. Design/methodology/approach Bonded solid lubricant coatings containing Kevlar fibres were prepared by a spraying method. The friction and wear properties of the coatings were experimentally investigated with a face-to-face tribometre under dry friction conditions. Scanning electron microscopy, energy dispersive X-ray spectroscopy and 3D laser scanning technologies were used to characterise the tribological properties. The action mechanism of the Kevlar fibres on a solid lubricant transfer film was also analysed. Findings Adding Kevlar fibres can significantly improve the wear resistance of the coatings. When the Kevlar fibre content increases, the tribological properties of the coatings improve and then worsen. Superior properties are obtained with 0.03 g of Kevlar fibres. Appropriately increasing the load or speed is beneficial to the removal of the outer epoxy resin and the formation of a lubricant film. During friction, the solid lubricants wrapped in the epoxy resin accumulate on the surface to form a transfer film that shows a good self-lubricating performance. In the later friction stage, fatigue cracks occur on the solid lubricant film but cannot connect to one another because of the high wear resistance and the entanglement of the rod-like Kevlar fibres. Thus, no large-area film falls from the matrix, thereby ensuring the long-term functioning of solid lubricant coatings. Originality/value Epoxy resin-based solid lubricant coatings modified by Kevlar fibres were prepared, and their friction and wear properties were investigated. Their tribological mechanisms were also proposed. This work provided a basis for the analysis of the tribological properties and design of bonded solid lubricant coatings containing Kevlar fibres.

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