期刊
TRIBOLOGY LETTERS
卷 8, 期 4, 页码 213-218出版社
BALTZER SCI PUBL BV
DOI: 10.1023/A:1019151721801
关键词
copper; nanoparticle; antiwear ability; load-carrying capacity; friction-reduction property
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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