An effort was conducted to study and characterize the effects of nanodiamond particles as an additive to lubricating mineral oil. The tests were run for varying concentrations ranging from pure mineral oil to 0.01% weight-concentration of nanodiamonds. The friction was measured throughout the tests, and the resulting wear was measured with optical profilometry. It was observed that both the average friction coefficient and the wear would decrease proportionally to the concentration of nanodiamond particles, and the 0.01% nanodiamond weight concentration was observed to improve the tribological performance of lubricating mineral oil. Chemical analysis of contacting surfaces showed no significant distinction from the nanodiamond mixture versus the pure mineral oil, while particle size analysis demonstrated that the nanoparticles themselves remained intact (i.e., no breakup) in the contact interface. This helps to conclude that a mechanical and not a chemical effect of the nanodiamond particles helped to protect the metallic surface from wear and improve the lubricating ability of the mineral oil.
Tribological Improvements of Dispersed Nanodiamond Additives in Lubricating Mineral Oil
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received April 8, 2014; final manuscript received July 21, 2014; published online October 21, 2014. Assoc. Editor: George K. Nikas.
This work is in part a work of the U.S. Government. ASME disclaims all interest in the U.S. Government's Contributions.
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Marko, M., Kyle, J., Branson, B., and Terrell, E. (October 21, 2014). "Tribological Improvements of Dispersed Nanodiamond Additives in Lubricating Mineral Oil." ASME. J. Tribol. January 2015; 137(1): 011802. https://doi.org/10.1115/1.4028554
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