Investigation of the Wear Resistance Properties of Cr/CrN Multilayer Coatings against Sand Erosion

Figure 6

SEM images of cross-sections of eroded Cr/CrN coatings (a) Cr1/CrN3@30° (b) Cr1/CrN1@30° (c) Cr1/CrN1@90° (d) Cr0.5/CrN0.5@90° (e) Cr1/CrN1@30° (f) Cr3/CrN1@90° (g) Cr1/CrN3@60° (h) Cr3/CrN1@60°.