Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 9, pp. 1317−1325.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © A.A. Ivanov, V.V. Botvin, A.G. Filimoshkin, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86, No. 9, pp. 1345−1353.
AND INDUSTRIAL INORGANIC CHEMISTRY
A New Technology for Forming Highly Developed
Aluminum Surface by Electric Pulse Ablation
A. A. Ivanov, V. V. Botvin, and A. G. Filimoshkin
National Research Tomsk State University, Tomsk, Russia
Received July 30, 2013
Abstract—A novel polymeric composite whose conducting domains in the course of electric pulse treatment
transfer onto an aluminum surface the microrelief information in the form of roughness was suggested. The degree
of roughness is larger than 9.0 μm, exceeding by a factor of approximately 200 the aluminum surface roughness
before ablation (R
= 9.42 μm, roughness coefﬁ cient K = 16.69, proﬁ le height along the base length from 5 to
70 μm). Analysis of 3D scans and proﬁ lograms of the aluminum plate surface after the ablation allows choice of
methodological and technological approaches to the formation of the developed surface topology by this procedure.
Preparation of multilayer coatings for various purposes,
e.g., in electronic industry and LED technology, requires
the development of a modern technology for treating
smooth metal surfaces, namely, for creating a rough surface
or a relief structure, a pattern, or a certain image [1, 2]. A
certain analog of such process is photolithography, when
the phototemplate image is transferred as a relief pattern
onto a silicon surface.
In some cases, the most convenient way to create rough-
ness is electroerosion treatment. At the same time, creation
of a rough surface and subsequent application of coatings
onto it involve fundamental problems concerning the
physical chemistry of the surface, in particular, adhesion.
For example, ﬁ lled polyaluminosilicates are applied as
a dielectric layer onto the surface of aluminum items with
a high degree of roughness. These coatings facilitate the
dissipation of heat released in the operating microelectronic
and LED devices .
There is no need to speak of the role of microelectronics
in the economy of any state. Particular attention is given
today to the development of electronic and LED industry
in Russia. However, signiﬁ cant progress in these branches
will be possible only if new materials, processes, and struc-
tures capable to replace imported ones will be developed
and introduced into practice. That is one of the main goals
of the Russian innovation strategy.
This study is the ﬁ rst in a series of studies concerning
formation of multilayer coatings. Its aim consists in the
development of a novel conducting polymeric composite
(CPC) as a working electrode with agglomerates of silver
particles of different heights and cross sections, arranged
in the polymeric matrix, as conducting paths, and also in
the development of electric pulse ablation procedure using
this CPC as cathode.
The development of the new technology is based on
the assumption that the electric pulse treatment involves
peculiar transfer of the information on the microrelief of
the conducting paths of the CPC cathode in the 3D format
onto the surface of an aluminum item acting as anode (in
our experiments, onto an aluminum plate). The relief pat-
tern of deﬁ nite conﬁ guration is “recorded” on the plate
surface as roughness of high degree.
Working electrodes in the form of CPC with the surface
microrelief design bearing a certain idea can be used for
special electroerosion ablation of metal items.
CONDUCTING POLYMERIC COMPOSITE
BASED ON SILVER
NANO- AND MICROPARTICLES
AS WORKING ELECTRODE FOR
Electroerosion (in particular, electric pulse) ablation