Fig. 1. SEM images of powder. (a) Fe901 powder; (b) Al2O3 powder; (c) Al2O3/Fe901 powder

Fig. 2. Macro-morphologies of different coatings. (a) Fe901 coating; (b) 5%Al2O3/Fe901 composite coating; (c) 10%Al2O3/Fe901 composite coating; (d) 15%Al2O3/Fe901 composite coating

Fig. 3. Microstructures of 10%Al2O3/Fe901 composite coating and Fe901 coating. (a) Top of composite coating; (b) middle of composite coating; (c) bottom of composite coating; (d) top of Fe901 coating; (e) middle of Fe901 coating; (f) bottom of Fe901 coating

Fig. 4. Microstructural evolution mechanism of composite coating. (a) Formation of molten pool; (b) melt flow in molten pool; (c) solidification of molten pool; (d) solidification forming coating

Fig. 5. XRD patterns of Fe901 coating and 10%Al2O3/Fe901 composite coating. (a) Fe901 coating; (b) 10%Al2O3/Fe901 composite coating

Fig. 6. Element plane scanning results of 10%Al2O3/Fe901 composite coating. (a) SEM image; (b) overlay graph of all elements; (c) Al element plane scanning; (d) Fe element plane scanning

Fig. 7. EDS element analysis of polygonal particle

Fig. 8. Microhardness distribution of composite coating and Fe901 coating. (a) Microhardness distribution along depth; (b) average microhardness of composite coatings

Fig. 9. Wear resistance of Fe901 coating and 10%Al2O3/Fe901 composite coating. (a) Friction and wear curves; (b) mass loss in wear test

Fig. 10. Surface wear morphology of Fe901 coating and 10%Al2O3/Fe901 composite coating. (a) Fe901 coating; (b) 10%Al2O3/Fe901 composite coating