TRIBOLOGICAL PROPERTIES OF THE ELECTRO-SPARK DEPOSITED TUNGSTEN CARBIDE-CERAMIC COATINGS
Journal Title: Tribologia - Year 2014, Vol 256, Issue 4
Abstract
The process of material growth resulting from electroerosion is known as electro-spark alloying (ESA) or electro-spark deposition (ESD). The erosion of the anode and the spark discharges between the electrodes result in the formation of a surface layer with properties different from those of the base material. The processes of coating formation on metal parts, including electrospark deposition, involve mass and energy transport accompanied by chemical, electrochemical, and electrothermal reactions. Today, different electro-spark deposition techniques are used. They are suitable for coating formation and surface microgeometry formation. The paper is concerned with the performance properties of electrospark deposited coatings, which were determined using tribological and microstructural analysis, measuring the bonding strength and application tests. The studies were conducted using WC-Co-Al2O3 and WC-Co- Al2O3/3TiO2 electrodes produced by sintering nanostructural powders. The anti-wear coatings were electro-spark deposited over C45 carbon steel by means of an EIL-8A. These coatings are likely to be applied in sliding friction pairs and as protective coatings.
Authors and Affiliations
Norbert RADEK, Izabela BILSKA, Krzysztof ANTOSZEWSKI, Jacek PIETRASZEK
Keywords
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