Showing papers by "Ramanathan Arunachalam published in 2009"
TL;DR: In this paper, an Aluminium Metal Matrix composites (AMC) casting consisting of 85%Vol. Aluminium Alloy (LM25) and 15% Vol. Silicon carbide (SiC) particle has been prepared through stir casting.
13 citations
Journal Article•
TL;DR: In this article, a comparative study of dc and pulse plating of silver on silver alloy is made, and the influences of peak current density on the thickness and current efficiency of the plating process are studied.
Abstract: The objective of this work is to make a comparative study of dc and pulse plating of silver on silver alloy. The dc and pulsed electro deposition of silver on silver alloy is analyzed from an alkaline cyanide bath with brightener. Pulse duty cycles of 20 to 80%, at frequencies 10, 25, 50 and 100 Hz with peak current densities of 3.21, 3.75 and 4.55 A/dm 2 are employed. The influences of peak current density on the thickness and current efficiency of the plating process are studied. The surface morphology is characterized by SEM and XRD. Less porosity and fine grains are formed by pulse plating compared to that formed by dc plating.
13 citations
TL;DR: In this article, the surface morphology and composition of the electro deposit are influenced by current density, silver concentration in the bath, applied current type and addition of additive, and it has been observed that with the increase of silver in the sample, the amount of silverdeposited, hence the thickness of the deposit varies for the same current and voltage settings.
Abstract: This research attempts to optimize the parameters for DC plating of silver on silver alloy of two differentcompositions namely 50% and 75% silver alloy. In the Silver –copper alloy, the surface morphology and compositionof the electro deposit are influenced by current density, silver concentration in the bath, applied current type andaddition of additive. It has been found that concentration of silver in silver alloy has an effect in weight electrodeposited over cathode in DC plating. The surface morphology is studied by taking SEM micrograph for thetwo different compositions of silver alloy and grain size is measured using XRD analysis. Higher the purity of silver,finer is the grain size. It has been observed that with the increase of silver in the sample, the amount of silverdeposited, hence the thickness of the deposit varies for the same current and voltage settings.
3 citations