Structural and phase transformations in plasma sprayed coatings by powerful ultrasound loading and laser melting

The application of different treatment methods on the spray coatings allows a decrease in the defects of the coatings and leads to an increase of protection qualities. High energy actions on the coatings by ultrasound loading and laser melting are very effective in improving properties of spray coatings without thermal influence to the substrate. To pick out a more effective method of treatment of the coatings and predict the development of changes in the coatings by intensive deformation and thermal heating, it is very important to know the peculiarities of transformations in the coatings on the different structural levels. Complex research of the structure and phase composition of the coatings sprayed by means of optical and electron microscopy and X-ray-structural analysis gives more exact notions about processes taking place by forming coatings and transformations. The peculiarities of the structure and phase composition of the plasma sprayed coatings based on the nickel was determined. It was proved in practice that methods of action on the coatings are leading to material changes of the structure and phase composition, which cause improvement of the strengthening and corrosion properties