Figure 5

Cross-section morphology of the coatings. Subfigures (a),(c),(e) and (g) are the surfaces of the coating without h-BN particles in the tenth, twentieth, thirtieth and fortieth minutes, respectively; Subfigures (b),(d),(f) and (h) are the surfaces of the coating containing h-BN particles in the tenth, twentieth, thirtieth and fortieth minutes, respectively.