PROPERTIES OF COMPOSITE ELECTROCHEMICAL COATINGS MODIFIED WITH ZIRCONIA

The method is proposed for depositing composite electrochemical coatings based on copper and nickel modified with zirconium oxide. Coatings were obtained from electrolyte suspensions based on sulfate electrolytes of copper plating and nickel plating with the addition of zirconium oxide powder as a dispersed phase. Methods for determining the strength indices are proposed. The microstructural and mechanical characteristics of the obtained Cu-ZrO 2 and Ni-ZrO 2 composites, such as microhardness and relaxation stability, are determined depending on the conditions of electrodeposition. An increase in the physical and mechanical properties of materials is shown with an increase in the content of copper plating and nickel plating of zirconium oxide in electrolytes in comparison with monometallic analogs, and the influence of matrix material on microhardness and relaxation stability was revealed. The character of the dependences of the physical and mechanical properties on the content of the dispersed phase in electrolytes is established. The influence of the nature of the dispersed phase on the graininess of the coatings was studied, the size of the secondary phase particles in the composites was determined, and the influence of the particle concentration on the size of the conglomerates was determined.