Research Article
Experimental Evaluation of Oxide Nanoparticles as Friction and Wear Improvement Additives in Motor Oil
Figure 11
Optical micrographs of top compression ring test scars for (a) PAO, (b) fully formulated 5W-30, (c) PAO + TiO2, and (d) PAO + Al2O3.
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| (b) |
| (c) |
| (d) |