Abstract：The microstructure, elemental composition and surface morphology of Al-Mn coatings were analyzed by SEM, EDS and XRD after diffusion annealing. Anti-abrasion performance of alloy coating was studied by using dynamic abrasion tester, and then wear mechanism was discussed. The results show that pure aluminum coating is dominated by Fe4Al13 and FeAl phases. Aluminum-manganese alloy coating surface is dominated by phases including MnAl6, Mn3Al10 and Fe4Al13. The anti-abrasion performance of Al-2%(mass fraction, same as below) Mn sample which manganese content close to the eutectic point is the best. The abrasive wear of pure Al and Al-2%Mn sample is dominated mainly by microscopic fracture mechanism(spalling), the abrasive wear of Al-9%Mn and Al-13%Mn sample is mainly caused by repeated plastic deformation(micro-plow).
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2015, Vol. 43 
