ISSN 1070-4272, Russian Journal of Applied Chemistry, 2014, Vol. 87, No. 5, pp. 596−600. © Pleiades Publishing, Ltd., 2014.
Original Russian Text © N.D. Sakhnenko, O.A. Ovcharenko, M.V. Ved’, 2014, published in Zhurnal Prikladnoi Khimii, 2014, Vol. 87, No. 5, pp. 607−611.
AND CORROSION PROTECTION OF METALS
Electrodeposition and Physicomechanical Properties
of Coatings and Foil of Copper Reinforced
with Nanosize Aluminum Oxide
N. D. Sakhnenko, O. A. Ovcharenko, and M. V. Ved’
Kharkiv Polytechnic Institute, National Technical University,
ul. Frunze 21, Kharkiv, 61002 Ukraine
Received May 29, 2014
Abstract—Method of electrosynthesis of composite coatings and foil composed of copper reinforced with nanosize
aluminum oxide is described. A method for chemical dispersion of aluminum oxide by the top-down principle and
an electrolyte composition are suggested, which provide synthesis of composite materials with varied content of
the modifying phase. The results of mechanical tests indicate that the plasticity, strength, and a number of other
physicomechanical properties of thus synthesized composite materials are improved.
In recent years, scientiﬁ c developments in the ﬁ eld of
synthesis of functional nanomaterials have been vigor-
ously evolving . Modern studies are concentrated on
a search for new approaches to design and formation of
multiphase nanostructures, which is due to the prospects
for their application in numerous ﬁ elds of science and
technology. Increasingly widely used, with the develop-
ment of the electrolytic, metallurgy, are composite coat-
ings deposited from electrolytes-suspensions containing
highly dispersed powders, which are, as a rule, composed
of aluminum, titanium, or zirconium oxides. In the course
of electrolysis, particles of the dispersed phase are incor-
porated in the cathodic deposit, overgrown with the metal,
and ﬁ xed in the metallic matrix, rather than being reduced.
Composite electrochemical coatings (CECs) of this kind
possess a set of physicomechanical and chemical proper-
ties surpassing those of the conventional metal coatings.
The enhanced corrosion resistance, friction and wear
resistance, hardness, and other service characteristics of
CECs make these coatings promising for modiﬁ cation
of the surface of metallic articles. Because copper foil
and copper coatings are an important element of many
electronic and electrotechnical systems, it is of interest
to improve their strength and hardness at a preserved
plasticity by reinforcing the metallic matrix with nanosize
aluminum oxide [2, 3].
The present study is concerned with the electrosyn-
thesis of copper-based coatings and foil including Al
nanoparticles and the physicomechanical properties of
the materials obtained.
The foil based on copper reinforced with nanosize
aluminum oxide was obtained on substrates made of
polished Kh18N10T stainless steel (AISI 304), adhesion-
enhanced CECs of similar composition were deposited
onto St.20 steel.
The electrodeposition of foil and coatings was per-
formed from pyrophosphate copper-plating electrolytes
 of composition (g dm
): potassium pyrophosphate
330–380, copper sulfate 70–90, sodium citrate 15–25,
with varied content of the dispersed phase. The electro-
lyte solutions were prepared from certiﬁ ed reagents of
chemically pure grade and distilled water. The electrolysis
was performed with a B5-47 stabilized dc power source,
with the current density maintained at 2–3 A dm
copper plates [GOST (State Standard) 859–2001] served