Figure 10. SEM morphologies of the worn surfaces of Cr−C coatings (a) as-deposited, (b) annealed at 200 °C, (c) annealed at 400 °C, (d) annealed at 600 °C and Cr−C/Al2O3 composite coatings (e) as-deposited, (f) annealed at 200 °C, (g) annealed at 400 °C, (
{}