Abstract
Nanosized Cu, modified by an organic compound containing S and P was synthesized using a surface‐modification method. The size and structure of the Cu nanoparticles were characterized by means of a transmission electron microscope (TEM) and electron diffraction (ED). Their tribological behavior was evaluated on a four‐ball machine. The results showed that Cu nanoparticles as an oil additive have better friction‐reduction and antiwear properties than ZDDP, especially at high applied load. Meanwhile, they can also strikingly improve the load‐carrying capacity of the base oil. The rubbed surface was investigated by electron probe microanalysis (EPMA) and X‐ray photoelectron spectroscopy (XPS). It was found that the boundary film on the worn surface consisted of a Cu nanoparticle deposited film and a tribochemical reaction film containing S and P. A synergistic effect between the deposited film and tribochemical reaction film contributes to the good tribological properties of oil.
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Zhou, J., Wu, Z., Zhang, Z. et al. Tribological behavior and lubricating mechanism of Cu nanoparticles in oil. Tribology Letters 8, 213–218 (2000). https://doi.org/10.1023/A:1019151721801
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DOI: https://doi.org/10.1023/A:1019151721801