Effect of Surface Roughness and Particle Size on Lubrication Mechanisms of SiO<sub>2</sub> Nanoparticles

<div>An XPS spectra of Si<sub>2</sub>p, O 1s, and Fe<sub>2</sub>p on the wear surface lubricated with 0.3 wt. % SiO<sub>2</sub> nanoparticles.</div>

Advances in Materials Science and Engineering

Figure 10: Effect of Surface Roughness and Particle Size on Lubrication Mechanisms of SiO<sub>2</sub> Nanoparticles 