Abstract
Recently, the di-n-octodecyldithiophosphate (DDP) coated nanoparticles such as MoS2[1], ZnS[2] and Cu[3] used as oil additives have been investigated, results showed these coated nanoparticles exhibited good tribological properties. Cu nanoparticle have also attracted considerable attention because of their catalytic, optical, conductive[4–7]. A number of different ways have been developed to prepare Copper nanoparticles, such as thermal reduction[4], microemulsion[8], sonochemical reduction[9], and chemical reduction[10]. Thereinto, the liquid phase chemical reduction method[11–14] has proved the most versatile and simple approach for nanomaterials because of the controlled expediently nucleation and growth.
In this study, monodispersed Cu-Sn alloy Nanoclusters were prepared in the water/acetone system. The nanoclusters were characterized with XPS, FT-IR, TG, TEM and ED. The friction experiments were carried out with the MRS-1 OA four-ball testing machine under a rotating speed of 1450 rpm in the ambient conditions. The employed base oil was Chang Cheng lubricants (SE 15W/40). The contents of the additives were in the range of 0.25–1.0% by weight. The results indicate that the Cu-Sn nanoclusters have small kinetic friction coefficient and shows lubrication and anti-wear property. The friction and wear mechanism of the nanoclusters in oil was also discussed. Based on the results of surface analysis, the action mechanisms of the Cu-Sn nanoclusters as lubricant additives, can be described as: under boundary lubricating conditions, nanoclusters are transferred to the friction surface and generate a mixed boundary thin film, which simultaneously reduces the friction and wear.
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© 2009 Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg
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Zhao, T., Yuy, S., Zhang, Z., Sun, R., Du, R. (2009). Preparation and Tribological Properties of Monodispersed Metallic Cu-Sn Alloy Nanoclusters with Modified Surface. In: Luo, J., Meng, Y., Shao, T., Zhao, Q. (eds) Advanced Tribology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-03653-8_304
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DOI: https://doi.org/10.1007/978-3-642-03653-8_304
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