Research Article
Effect of Surface Roughness and Particle Size on Lubrication Mechanisms of SiO2 Nanoparticles
Figure 7
Worn morphologies of the wear scars lubricated with base fluid (a-e) and nanofluid (f-j) under different surface roughness: (a), (f) Ra: 0.05 μm, (b), (g) Ra: 0.1 μm, (c), (h) Ra: 0.3 μm, (d), (i) Ra: 0.5 μm, (e), (j) Ra: 1.0 μm (300 (N) 300 rpm).
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