Fundamental Research on the Structure and Properties of Electroerosion-Resistant Coatings on Copper
| Autor: | Kirill V. Sosnin, V. E. Gromov, D. A. Romanov, V. V. Pochetukha |
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| Rok vydání: | 2021 |
| Předmět: |
electron beam processing
Materials science QC1-999 Materials Science (miscellaneous) cuo–ag chemistry.chemical_element 02 engineering and technology composite coating 01 natural sciences copper contact wires erosion resistant 0103 physical sciences electroexplosion spraying zno–ag 010302 applied physics Fluid Flow and Transfer Processes Physics Metallurgy Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Copper Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry nanostructurization 0210 nano-technology |
| Zdroj: | Успехи физики металлов, Vol 22, Iss 2, Pp 204-249 (2021) |
| ISSN: | 2617-0795 1608-1021 |
| DOI: | 10.15407/ufm.22.02.204 |
| Popis: | The electroerosion-resistant coatings of CuO–Ag and ZnO–Ag systems were obtained on the Cu surface. The formation of the coating was caused by the processing of copper surface with a plasma formed in the electrical explosion of silver foil with a weighed sample of copper oxide or zinc oxide. After electroexplosion spraying, the electron-beam treatment of coatings was performed. The nanohardness, Young modulus, wear resistance, friction coefficient, and electrical erosion resistance of the formed coatings were studied. All studied properties exceed those of copper. Electrical erosion coatings were studied by the methods of scanning electron microscopy, transmission electron microscopy, and atomic force microscopy. It became possible to achieve the high level of operational properties of electrical erosion coatings due to their nanostructurization. Structure of coating is formed by cells of high-speed crystallization. The size of cells varies within the range from 150 nm to 400 nm. The cells are separated by interlayers of the second phase whose thickness varies as 15–50 nm. By method of atomic force microscopy, the separate particles of ZnO or CuO of different shapes and 10–15 nm in size chaotically located in silver matrix were revealed as well as spherical particles of ZnO or CuO in size of 2–5 nm. The total thickness of coatings is 60 μm. The complex of studies we have carried out permits to recommend the integrated processing for strengthening the switch copper contacts of powerful electrical networks. |
| Databáze: | OpenAIRE |
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