Electrodeposition and Properties of Copper Coatings Modified by Carbon Nanomaterial Obtained From Secondary Raw Materials
With the development of electroplating, composite coatings of CEP, which are deposited from electrolyte suspensions, are increasingly being used. Composite coatings are obtained in those cases when it is envisaged to modify the surface of metal products to give them new properties. Perspective dispersed material can be carbon particles, because of their large specific surface area, high porosity, and subminiature structure. The obtaining of such material is possible from cheap secondary raw materials (car tires, nutshells, sawdust, bamboo).
The purpose of this work is to create a CEP-based on copper with a carbon-dispersed phase. For the experiment, we used a carbon material with a particle size 40 nm, obtained by us, by pyrolysis from secondary raw materials (used tires of machines).
To study the effect of the dispersed phase on copper electrodeposition, the optimum conditions for obtaining the CEP Cu-C were determined. 68Morphology and coefficients of friction-sliding of coatings of copper and CEP are studied.
Incorporating into the base metal matrix, the carbon particles, embedded in the deposit, determine its further growth. The change in the structure of the electrolytic deposit affects its functional properties.
The test of the obtained samples showed that the best tribological properties were found in CEP Cu-C, where the concentration of carbon material was 15 g/L. For CEP Cu-C, the friction coefficient (f) decreases three times compared to copper deposit, and wear by 12 times. Probably this is due to the fact that the carbon material performs the function of dry lubrication due to its layered structure.