Journal
TRIBOLOGY TRANSACTIONS
Volume 57, Issue 6, Pages 1051-1057Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10402004.2014.933933
Keywords
Friction Modifier; Antiwear Additive; Nanotribology; Solid Lubricant Additives; Nanolubricants; Nanodiamonds
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Funding
- RFBR [12-03-93937-G8_a]
- U.S. National Science Foundation [CMMI-1229889]
- Fund for Scientific Research Flanders (FWO)
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Synergistic compositions of detonation nanodiamond (DND) particles with polytetrafluoroethylene and molybdenum dialkyldithiophosphate were used in ring-on-ring, four-ball, and block-on-ring tests as an additive to polyalphaolefins and engine oils. Modest to significant reductions in the friction coefficients, wear, or both were observed. In the wear scars produced in the block-on-ring tests, the friction surfaces were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and profilometry. Significant polishing effects of the friction surfaces in lubricants containing DND were revealed in SEM observations and roughness measurements. The roughness of the scar surfaces produced in the presence of DND additives was about 35% lower than the roughness of the scars observed in pure oil experiments.
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