| Effect of the size and morphology of particles dispersed in nano-oil on friction performance between rotating discs
Yujin Hwang, Changgun Lee, Youngmin Choi, Seongir Cheong, Doohyun Kim, Kwangho Lee, Jaekeun Lee and Soo Hyung Kim*
The Journal of Mechanical Science and Technology, vol. 25, no. 11, pp.2853-2857, 2011
Abstract : Various carbon-based particles such as graphite, carbon black, graphite nanofibers and carbon nanotubes were dispersed in mineral oil
to systematically examine the effect of the size and shape of particles on the properties of friction performance. As the results of friction
tests using a disc-on-disc tribotester, the friction coefficient of a disc specimen was significantly reduced when nano-sized spherical particles
were suspended in mineral oil. This was attributed to the presence of spherical nanoparticles, which prevented direct contact between
frictional surfaces. However, the fibrous nanoparticles with high aspect ratios deteriorated the lubrication performance between
friction surfaces due to a higher degree of agglomeration.
Keyword : Friction performance; Nanoparticles; Graphite; Carbon black; Graphite nanofibers; Carbon nanotubes; Nano-oil |
