Distributed reaction surface of carbon-graphite volume-porous cathodes as a parameter for optimizing of metallization process of composite and nanocomposite materials
Introduction. The porous composite and nanocomposite materials discussed in this publication are metallized carbon-graphite materials, in particular carbon fiber materials (CFMs). At metallization of CFMs one of the actual problems is the task of applying uniform metal coating on the surface of...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
OOO "CNT «NanoStroitelstvo»
2025-04-01
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| Series: | Нанотехнологии в строительстве |
| Subjects: | |
| Online Access: | https://nanobuild.ru/en_EN/journal/Nanobuild-2-2025/119-131.pdf |
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| Summary: | Introduction. The porous composite and nanocomposite materials discussed in this publication are metallized carbon-graphite
materials, in particular carbon fiber materials (CFMs). At metallization of CFMs one of the actual problems is the task of applying
uniform metal coating on the surface of CFMs fibers over the entire volume of the processed material. One of the most effective
ways to coat CFMs with metals and their alloys is the galvanic method. This method allows, among other things, to optimize the
process by optimizing both the design of the electrolyzer with flow-through three-dimensional electrodes (FTE) and the choice of
electrodeposition modes, such as galvanic, concentration, and hydrodynamic. Materials and methods. Methods of mathematical
modeling of porous medium metallization processes and previously published experimental data were used to solve problems
on calculation of operating modes and elements of the electrolyzer design, in particular, the specific reaction surface of the UWM
distributed over the thickness of the electrolyzer. Results and discussion. The development of mathematical models of the pro
cesses of electroplating metallization of CFMs is carried out. Boundary value problems of mathematical physics are formulated
and calculation methods are proposed. Problems of optimization of distribution of specific reaction surface of CFMs by thickness
of FTE on the basis of electrochemical theory of processes in porous medium are set, ways of their solution are presented. Specific
technological problems are solved. The comparison of the most effective values of the distribution of specific reaction surface of
CFMs over the thickness of FTE obtained as a result of modeling with the experimental data is given. The workability of models and
methods for studying the process of copper electrodeposition from sulfuric acid electrolyte is shown. Conclusion. Calculation of
regularities of electrochemical processes of metal extraction in FTE on the basis of the developed mathematical models allows to
predict the results of electrolysis, determine the optimal modes of operation and elements of FTE design. The use of FTE for metal
lization of CFMs with properly distributed reaction surface contributes to obtaining composite materials with specified properties. |
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| ISSN: | 2075-8545 |