Characterization of ceramic MAO-coating modified with AlN nanofibers created on silumin with different contents of silicon
The results of the study of structure and phase composition of oxide-ceramic coatings processed with micro-arc oxidation on aluminum alloys AK9 and AK12M2MgN in the electrolyte containing the additive of AlN nanofibers are presented. It is shown that aluminum nitride nanoparticles introduced into the electrolyte intensify the process of forming the coating, which leads to growth of its thickness ~ 2.0 times, and increase in the content of high-temperature form of aluminum oxide α-Al2O3. The latter provides the coating micro-hardness 1.3-1.5 times. Simultaneously modifying of oxide coating matrix with nitride phases occurs, which form islet-type inclusions.