A copper-zinc bath containing EDTA was used for deposition of multi-functional copper-zinc coatings. Copper substrates were used for pulse electrodeposition of copper-zinc coating. Microhardness and wear resistance of copper-zinc coatings has been studied. The films were characterized by scanning electron microscopy and X-ray diffraction. EDS and EDS-dot mapping were also performed to analyse the amount and the distribution of Cu-Zn atoms.
The aim of this study was to obtain the second generation TiO₂ nanotubes on the Ti13Nb13Zr alloy. Anodic oxidation of the alloy under study was carried out in 1 M (NH₄)₂SO₄ electrolyte under voltage-time conditions of 20 V for 120 min. The morphological parameters of the obtained nanotubes of second generation such as the length (L), internal (D_{i}) and outer (D_{o}) diameter of nanotube were determined. It was found that the anodic oxidation of the Ti13Nb13Zr alloy conducted under proposed conditions allowed to obtain the single-walled nanotubes of the following geometrical parameters: the internal diameter 61 nm, outer diameter 103 nm, and the length 3.9 μm. The total surface area of the single-walled nanotubes was equal to 4.1 μm², and the specific surface area per cm² (A_{s}) was estimated to be 15.6 cm²/cm². Formation mechanism, structure and optimal morphological parameters of the obtained single-walled nanotubes on the Ti13Nb13Zr alloy have been discussed in detail.
The aim of the present work was the modification of the electrochemical properties of expanded graphite by ozone treatment. Electrochemical investigations showed that ozone modification of expanded graphite electrodes results in the significant improvement of their electrochemical activity towards the phenol carried out by cyclic voltammetry method in alkaline solution. The highest activity demonstrates sample expanded graphite modified under ozone atmosphere at elevated temperature. The analysis of Fourier transform infrared spectra and voltammetric curves recorded in electrolyte without phenol additive showed increased concentration of different types of oxygen functional groups on the surface of modified expanded graphite.
Carbon nanotube thin sheets - buckypapers - were prepared from multi-walled carbon nanotubes oxidized with different oxidation agents. Titanium dioxide films were then deposited by thermal evaporation of Ti films on buckypapers substrates followed by in situ dc plasma oxidation. The effect of oxidation power on the structural, compositional and electrochemical properties of the films was investigated.
High content carbon nanotubes mats have been produced to multi-walled carbon nanotubes. Sb doped SnO_2 films were then deposited by rf magnetron sputtering on buckypapers substrates. The effect of oxidation pressure on the structural, compositional, and electrochemical properties of the films was investigated.
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