Figure 3
From: Tribochemistry of adaptive integrated interfaces at boundary lubricated contacts
SEM images of the worn surfaces of CrN coated ring (a,b,c and d) and the opposing counterparts (e,f,g and h) in different sliding periods: (a,e) 1 h; (b,f) 2 h; (c,g) 4 h; (d,h) 8 h.
