Investigation of Nickel Nanopowders and Their Application as Lubricant Additives

Authors	G. Partizan², D.V. Ismailov², E.A. Ospanbekov¹, T.T. Aitasov¹, A. Kairatuly¹, D.S. Kerimbekov²
Affiliations	¹Abai Kazakh National Pedagogical University, Almaty, Kazakhstan ²Al-Farabi Kazakh National University, Almaty, Kazakhstan
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Issue	Volume 12, Year 2020, Number 5
Dates	Received 09 July 2020; revised manuscript received 15 October 2020; published online 25 October 2020
Citation	G. Partizan, D.V. Ismailov, E.A. Ospanbekov, et al., J. Nano- Electron. Phys. 12 No 5, 05035 (2020)
DOI	https://doi.org/10.21272/jnep.12(5).05035
PACS Number(s)	81.07.Wx, 46.55.d
Keywords	Nickel nanopowders, Anti-wear, Tribology, Lubricants.
Annotation	Nanolubricants have attracted great interest due to the promise of friction and wear reduction by introducing nanoparticles (NPs). To date, the foremost challenge for developing a new nanolubricant is particle suspension. Numerous NPs have recently been investigated for use as oil additives. Nanopowders of some metals and their compounds exert an especially effective influence on the characteristics of lubricants. The use of NPs that include Ni, Cu, Fe, TiO2 and other metallic NP additives in lubricating oils provides good friction reduction and anti-wear behavior. In this paper, we described the preparation of nickel nanopowders by the method of the electrical explosion of wire and their tribological performance as additives in oils. The obtained nickel nanopowders were investigated by the methods of scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The results of the investigation by SEM and TEM showed that the average diameter of these nanopowders is equal to 55.5 nm and their shape is spherical. Results of XRD investigation showed that nickel nanopowder has a pure fcc phase. The four-ball test results indicate that nickel nanopowders are potential additives for lubricating oils, and the tribological performance of lubricating oils can be improved significantly by dispersing nickel nanopowders in oils. Studies of tribotechnical properties have shown that the SAE-30 with nickel additives at concentrations of 0.4 wt. % has the best anti-wear properties in comparison with pure oil and other concentrations of nickel additive. The wear spot diameter has been reduced from 0.73 mm to 0.40 mm. The relative percentage of the friction coefficient has decreased by 47 percent.
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