Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
617146 | Wear | 2015 | 5 Pages |
Abstract
This study investigates the effect of incorporating nanoparticles - TiO2, Al2O3, CuO, and multi-walled carbon nanotubes (MWNTs) - within greases Mobilgrease 28 and Uniflor 8623B on their thermal transport and tribological properties. Nanoparticle filler fractions, varying from 0.01 to 0.10Â wt%, were homogeneously dispersed within selected greases. Two tribological tests were performed on a four-ball tribotester; ASTM D5183, and the ITeEPib Polish method for testing lubricants under scuffing conditions. Anti-wear properties resulted in up to 20% wear scar diameter (WSD) reduction using a very low filler fraction of 0.01Â wt% TiO2. For the extreme pressure test, the increase on the load-carrying capacity was found to be ~19% with a filler fraction of 0.05Â wt% CuO. A guarded hot-plate method-based apparatus was used in order to characterize thermal conductivity of nanogreases, showing an enhancement of ~28% in thermal conductivity with the addition of 0.10Â wt% MWNTs. These results demonstrate the potential of nanoparticle additives for improving thermal properties of greases while decreasing friction and wear of mechanical components.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
L. Peña-Parás, J. Taha-Tijerina, A. GarcÃa, D. Maldonado, A. Nájera, P. Cantú, D. Ortiz,