Abstract
The aim of this work is to analyze the structure and properties of coating of the SnO2-In2O3-Ag-N composition formed on copper by a complex method combining electroexplosive spraying, irradiation with a pulsed electron beam, and subsequent nitriding in the plasma of a low-pressure gas discharge. It is shown that the thickness of the coating is ≈ 100 μm. The wear resistance of a coated copper specimen exceeds the wear resistance of uncoated copper by a factor of 2.8. The friction coefficient of coated specimens μ = 0.479 is less than the coefficient of friction of copper without coating μ = 0.679 ± 0.048 by a factor of 1.4. It was found that the hardness of the coating increases as it approaches the substrate and reaches a maximum value of ≈ 1400 ± 98 MPa (the hardness of the substrate is 1270 MPa). Micro X-ray spectral analysis showed that the main chemical element of the coating is silver; copper, tin, indium, oxygen and nitrogen are present in much smaller amounts. It was established by X-ray phase analysis that the main phases of the coating are solid solutions based on copper and silver.
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