Abstract
The effect of layer-by-layer electric-spark alloying on the tribological parameters of a composite electrolytic coating of the system Ni – B is studied. It is shown that layer-by-layer electric-spark alloying with intermetallic TiAl and a composite AlN – ZrB2 halves coating wear and prevents transfer of coating material to the counterbody. The reason for this is formation of a graded structure for the surface layer including zircon ZrSiO4 and intermetallic TiAl. The latter is responsible for formation of β-tialite during tribological oxidation acting as a solid lubricant.
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