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. 2018 May 10;8:7457. doi: 10.1038/s41598-018-25850-6

Figure 5.

Figure 5

Typical COF lines for laser-textured AISI 316 L surfaces without and with 30-nm FAS-SiO2 nanoparticles in a dry environment. A clear difference in the running-in behaviour after adding nanoparticles is visible for samples with high Δy−1 (a), and no difference is observed for samples with low Δy−1 (b). For unprocessed samples (c), oscillations in the COF appear.