The Experts below are selected from a list of 969 Experts worldwide ranked by ideXlab platform
Osama M. Abdella - One of the best experts on this subject based on the ideXlab platform.
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Electroplating of nickel‐Cadmium Alloys from alkaline solutions
Journal of Chemical Technology and Biotechnology. Chemical Technology, 2007Co-Authors: Saye D. S. Abd El Rehim, Soad M. Abd El Wahaab, Osama M. AbdellaAbstract:The electroplating of Ni-Cd alloy coatings was carried out from alkaline baths (pH 10). For comparison, electroplating of the parent metals, Ni and Cd, was performed individually under the same conditions. The cathodic current efficiency for codeposition was high and decreased with increasing current density. The codeposition process is an anomalous type of plating with Cd being the preferentially deposited metal. The Ni content in the deposits increased with increasing current density. This increase in Ni content improves the corrosion resistance and microhardness of the deposits. X-ray diffraction analysis showed that the deposits consist of a mixture of Ni, β, γ, γ1 phases.
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electroplating of nickel Cadmium Alloys from alkaline solutions
Journal of Chemical Technology and Biotechnology. Chemical Technology, 2007Co-Authors: Saye D. S. Abd El Rehim, Soad M. Abd El Wahaab, Osama M. AbdellaAbstract:The electroplating of Ni-Cd alloy coatings was carried out from alkaline baths (pH 10). For comparison, electroplating of the parent metals, Ni and Cd, was performed individually under the same conditions. The cathodic current efficiency for codeposition was high and decreased with increasing current density. The codeposition process is an anomalous type of plating with Cd being the preferentially deposited metal. The Ni content in the deposits increased with increasing current density. This increase in Ni content improves the corrosion resistance and microhardness of the deposits. X-ray diffraction analysis showed that the deposits consist of a mixture of Ni, β, γ, γ1 phases.
A. Nasar - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic investigations of liquid gallium-Cadmium Alloys
Thermochimica Acta, 1998Co-Authors: M. Shamsuddin, Seema Singh, A. NasarAbstract:Abstract The activity of Cd in liquid Ga–Cd Alloys in the 723–851 K range was determined by an electrochemical technique using LiCl–KCl+5 wt.% CdCl 2 as molten salt electrolyte. The system exhibits a strong positive deviation from Raoult's law. From the activity values computed at different temperatures, the partial, integral, and excess molar thermodynamic quantities have been calculated. The composition dependence of the α -function confirms that the system does not follow a regular solution model. The analysis of Darken's stability function reiterates that though the stability is positive for all compositions, it is poor in the 0.25≤ x Cd ≤0.45 composition range. This shows a tendency for immiscibility in this composition range.
Saye D. S. Abd El Rehim - One of the best experts on this subject based on the ideXlab platform.
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Electroplating of nickel‐Cadmium Alloys from alkaline solutions
Journal of Chemical Technology and Biotechnology. Chemical Technology, 2007Co-Authors: Saye D. S. Abd El Rehim, Soad M. Abd El Wahaab, Osama M. AbdellaAbstract:The electroplating of Ni-Cd alloy coatings was carried out from alkaline baths (pH 10). For comparison, electroplating of the parent metals, Ni and Cd, was performed individually under the same conditions. The cathodic current efficiency for codeposition was high and decreased with increasing current density. The codeposition process is an anomalous type of plating with Cd being the preferentially deposited metal. The Ni content in the deposits increased with increasing current density. This increase in Ni content improves the corrosion resistance and microhardness of the deposits. X-ray diffraction analysis showed that the deposits consist of a mixture of Ni, β, γ, γ1 phases.
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electroplating of nickel Cadmium Alloys from alkaline solutions
Journal of Chemical Technology and Biotechnology. Chemical Technology, 2007Co-Authors: Saye D. S. Abd El Rehim, Soad M. Abd El Wahaab, Osama M. AbdellaAbstract:The electroplating of Ni-Cd alloy coatings was carried out from alkaline baths (pH 10). For comparison, electroplating of the parent metals, Ni and Cd, was performed individually under the same conditions. The cathodic current efficiency for codeposition was high and decreased with increasing current density. The codeposition process is an anomalous type of plating with Cd being the preferentially deposited metal. The Ni content in the deposits increased with increasing current density. This increase in Ni content improves the corrosion resistance and microhardness of the deposits. X-ray diffraction analysis showed that the deposits consist of a mixture of Ni, β, γ, γ1 phases.
G R Purdy - One of the best experts on this subject based on the ideXlab platform.
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plane front solidification of two phase peritectic tin Cadmium Alloys part 2
Materials Science and Technology, 1995Co-Authors: J W Rutter, M G Julien, G R PurdyAbstract:AbstractIn earlier studies, plane front solidification of binary peritectic Alloys has typically produced a banded microstructure, resulting from the deposition of alternate layers of the primary α phase and peritectic β phase. The mechanism by which this structure is formed has not been satisfactorily clarified. In the present study, thin specimens of binary Sn–Cd peritectic Alloys were horizontally solidified, unidirectionally, under very stable growth conditions at speeds of freezing R as low as 10 nm S−1, with a temperature gradient G of about 2 K mm−1, giving the high G/R necessary for plane front freezing. Steady plane front growth of Sn–2·58 wt-%Cd samples gave only α phase. Metastable growth of α phase was observed at temperatures as much as 7 K below the peritectic temperature, producing α phase having a composition well beyond its solubility limit at the peritectic temperature. Undercooling experiments showed that the β phase is nucleated at an undercooling of 1–2 K below the peritectic temperat...
M. Shamsuddin - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic investigations of liquid gallium-Cadmium Alloys
Thermochimica Acta, 1998Co-Authors: M. Shamsuddin, Seema Singh, A. NasarAbstract:Abstract The activity of Cd in liquid Ga–Cd Alloys in the 723–851 K range was determined by an electrochemical technique using LiCl–KCl+5 wt.% CdCl 2 as molten salt electrolyte. The system exhibits a strong positive deviation from Raoult's law. From the activity values computed at different temperatures, the partial, integral, and excess molar thermodynamic quantities have been calculated. The composition dependence of the α -function confirms that the system does not follow a regular solution model. The analysis of Darken's stability function reiterates that though the stability is positive for all compositions, it is poor in the 0.25≤ x Cd ≤0.45 composition range. This shows a tendency for immiscibility in this composition range.
