Abstract
Amorphous Ni–P alloy nanoparticles were synthesized by chemical reduction of nickel acetate in water reacted with sodium hypophosphite under stirring. The nanoparticles were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Results of XRD and TEM showed that nanoparticles have an average diameter 100 nm. And XPS analysis indicated that part of the surface of Ni–P amorphous alloy nanoparticles was oxidized. The tribological properties of the prepared Ni–P nanoparticles as an additive in lithium grease were evaluated with a four-ball friction and wear tester. The worn surfaces of the lubricated GCr15 steel were analyzed by means of XPS and scanning electron microscopy (SEM). The lubricating mechanisms were discussed on the basis of XPS and SEM analyses of the worn steel surfaces. The results show that these nanoparticles as a grease additive can effectively enhance the friction-reduction and antiwear ability of lithium grease. Tribochemical reactions were involved for steel–steel frictional pair lubricated with the lithium grease containing amorphous Ni–P alloy nanoparticles, with the formation of a boundary lubricating and protecting film composed of additives of lithium grease and tribochemical reaction products (iron phosphate, iron oxides, nickel oxide, nickel, etc.) of the lubricants. This contributes to improve the tribological properties of the lithium grease.
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Li, H., Li, H.X., Dai, W.L., et al.: XPS studies on surface electronic characteristics of Ni-B and Ni-P amorphous alloy and its correlation to their catalytic properties. Appl. Surf. Sci. 152, 25–34 (1999)
Lee, S.P., Chen, Y.W.: Selective hydrogenation of furfural on Ni-P, Ni-B, and Ni-P-B ultrafine materials. Ind. Eng. Chem. Res. 38, 2548–2556 (1999)
Li, H.X., Wang, W.J., Chen, H.Y., et al.: Surface morphology and electronic state characterization of Ni–P amorphous alloy films. J. Non-Cryst. Solids 28, 131–138 (2001)
Tatchev, D., Iorgov, D., Armyanov, S.: Magnetothermal investigation of crystallization of Ni–P amorphous alloys. J. Non-Cryst. Solids 270, 66–67 (2000)
Tachev, D., Georgieva, J., Armyanov, S.: Magnetothermal study of nanocrystalline particle formation in amorphous electroless Ni–P and Ni–Me–P alloys. Electrochim. Acta 47, 359–369 (2001)
Liu, B.S., Li, H.X., Cao, Y., et al.: Preparation and characterization of Ni-P amorphous alloy-ceramic composite membrane. J. Membr. Sci. 135, 33–39 (1997)
Xie, S.H., Qiao, M.H., Zhou, W.Z., et al.: Controlled synthesis, characterization, and crystallization of Ni-P nanospheres. J. Phys. Chem. B 109, 24361–24368 (2005)
Tatchev, D., Hoell, A., Kranold, R., et al.: Size distribution and composition of magnetic precipitates in amorphous Ni–P alloy. Physica B 369, 8–19 (2005)
Xue, Q.J., Liu, W.M., Zhang, Z.J.: Friction and wear properties of a surface-modified TiO2 nanoparticle as an additive in liquid paraffin. Wear 213, 29–32 (1997)
Zhang, Z.J., Xue, Q.J., Zhang, J.Y.: Synthesis, structure and lubricating properties of dialkyldithiophosphate-modified Mo-S compound nanoclusters. Wear 209, 8–12 (1997)
Hu, Z.S., Lai, R., Lou, F., et al.: Preparation and tribological properties of nanometer magnesium borate as lubricating oil additive. Wear 252, 370–374 (2002)
Zhang, Z.F., Liu, W.M., Xue, Q.J.: The effect of LaF3 nanocluster modified with succinimide on the lubricating performance of liquid paraffin for steel-on-steel system. Tribol. Int. 34, 83–88 (2001)
Chen, S., Liu, W.M.: Characterization and antiwear ability of non-coated ZnS nanoparticles and DDP-coated ZnS nanoparticles. Mater. Res. Bull. 36, 137–143 (2001)
Tarasov, S., Kolubaev, A., Belyaev, S., et al.: Study of friction reduction by nanocopper additives to motor oil. Wear 252, 63–69 (2002)
Liu, G., Li, X., Lu, N., et al.: Enhancing AW/EP property of lubricant oil by adding nano Al/Sn particles. Tribol. Lett. 18, 85–90 (2005)
Xia, H.: A study on the anti-wear behavior of S-P type gear oil additives in four-ball and Falex machines. Wear 112, 355–361 (1986)
Yammoto, Y., Hirano, F.: Scuffing resistance of phosphate esters II: effect of applied voltage. Wear 66, 77–86 (1981)
Placek, D.G., Shankwalkar, S.G.: Phosphate ester surface treatment for reduced wear and corrosion protection. Wear 173, 207–217 (1994)
Benziger, J.B., Madix, R.J.: Reactions and reaction intermediates on iron surfaces: I. Methanol, ethanol, and isopropanol on Fe(100). J. Catal. 65, 36–48 (1980)
Wager, C.D., Ring, W.M., Davids, L.E.: Handbook of X-ray photoelectron spectroscopy. Perkin-Elmer Corporation, Physical Electronics Division Press, Eden Prairie, MN (1979)
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The financial support from the National Basic Research Program of China (Grant No. 2007CB607606) and the National Natural Science Foundation of China in the name of “Innovative Group Fund” (Grant No.50421502) were gratefully acknowledged.
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Wang, L., Liu, W. & Wang, X. The Preparation and Tribological Investigation of Ni–P Amorphous Alloy Nanoparticles. Tribol Lett 37, 381–387 (2010). https://doi.org/10.1007/s11249-009-9536-1
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DOI: https://doi.org/10.1007/s11249-009-9536-1