Copper nanoparticles tribological properties

Tribological Properties of Sodium Stearate-Coated Copper Nanoparticles... 

A lot of studies have been conducted to evaluate the tribological properties of surface-capped copper nanoparticles. Zhou et al. [5] pointed out that the size and additive concentration of copper nanoparticles have a remarkable effect on their lubricating properties, based on the experimental results shown in Table 5.1. According to the results, DDP-capped Cu nanoparticles with grain sizes of 2 and 5 nm can improve the AW ability of LP effectively. However, DDP-capped Cu nanoparticles 12 nm in size decreased the AW ability of LP to some extent, while nonmodified copper nanoparticles (with a size of 40 nm) as additives in LP caused instant seizure under the same conditions. A rational explanation of the phenomenon... 

The study on the influence of rotating speed shows that the Mction-reduction properties of Cu nanoparticles increase with decreasing rotating speeds at lower applied loads. At higher applied loads, the rotating speed has little effect on the tribological properties of copper nanoparticles. 

The tribological properties of DDP-capped Cu nanoparticles in different base oils were studied by Yang et al. [11] and Qiu et al. [12]. The research results shown in Table 5.4 indicate that copper nanoparticles exhibit excellent AW and Mction-reducing properties in all kinds of oils [11, 12] These apparent performances have some difference due to the intrinsic diversity of oils. The EP properties of the copper nanoparticles are more obvious in... 

---