Аннотация
In this work, the structural-phase state of coatings formed on the surface of titanium by microarc oxidation (MAO) was studied. During the research, a number of experiments were carried out in which the process parameters and electrolyte composition were changed. Morphological and structural changes of the coatings were analyzed using various analytical methods, including electron microscopy and x-ray diffraction. Microarc oxidation of titanium was carried out in anodic potentiostatic mode for 10 minutes in various electrolytes based on phosphoric acid, sodium orthophosphate, potassium hydroxide and hydroxyapatite. After MDO, the microgeometry of the surface does not change, i.e. a thin coating 5-7 microns thick is formed on the titanium surface. The results of studying the surface of coatings using scanning electron microscopy showed that the most porous surface of all the studied coatings was found in coatings formed in an electrolyte with the addition of potassium hydroxide (KOH). The results of X-ray diffraction analysis showed that the main phase of the coatings are anatase and rutile. Electrolyte composition is one of the main factors in the MAO process. The research results allow us to deeply understand the process of coating formation during microarc oxidation of titanium.