Figure 7 | Scientific Reports

Figure 7

From: Rapid selection of environmentally friendly layered alkaline-earth metal phosphates as solid lubricants using crystallographic data

Figure 7

Analysis of the rubbing surface after long run (3600 s) friction-wear testing. (a) Non-contact 3D. (b) SEM. (c) EDS. Details of friction-wear test conditions are as follows: coconut oil calcium-based grease; 75 °C, 1200 rpm, 3600 s. The layered phosphates clearly formed protective films on friction pairs during the friction-wear tests.

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