Effect of electron beam processing on structure of electroexplosion electroerosion-resistant ZnO-Ag coating

Abstract

The structure, phase composition and properties of the composite electroexplosion coating of ZnO-Ag system subjected to the irradiation by the high intense electron beam have been studied for the first time. The combined processing including the electroexplosion spraying of the coating of ZnO-Ag system and its subsequent electron beam processing results in the formation of multilayer structure of the coating. By the methods of metallography, scanning and transmission electron microscopy, X-ray structural analysis the investigations into the phase and elemental composition, defect substructure of the coating and the transition layer between the coatings and copper electrical contact have been carried out. The electron beam melts and homogenizes the surface layer of the composite electroexplosion coating of ZnO-Ag system to the depth of 35–40 µm. The effect of the electron beam leads to the formation of the nanocrystalline phases of Ag, ZnO, Cu, CuZn, Ag5Zn8, Cu2O, Ag2O, Cu0.67Zn0.33, AgZn.The structure, phase composition and properties of the composite electroexplosion coating of ZnO-Ag system subjected to the irradiation by the high intense electron beam have been studied for the first time. The combined processing including the electroexplosion spraying of the coating of ZnO-Ag system and its subsequent electron beam processing results in the formation of multilayer structure of the coating. By the methods of metallography, scanning and transmission electron microscopy, X-ray structural analysis the investigations into the phase and elemental composition, defect substructure of the coating and the transition layer between the coatings and copper electrical contact have been carried out. The electron beam melts and homogenizes the surface layer of the composite electroexplosion coating of ZnO-Ag system to the depth of 35–40 µm. The effect of the electron beam leads to the formation of the nanocrystalline phases of Ag, ZnO, Cu, CuZn, Ag5Zn8, Cu2O, Ag2O, Cu0.67Zn0.33, AgZn.