Electrodeposition of bronze–PTFE composite coatings and study on their tribological characteristics

Balaji, Ramachandran; Pushpavanam, Malathy; Kumar, K. Deva Arun; Subramanian, K. G.

doi:10.1016/j.surfcoat.2006.06.039

Cited by 72 publications

(31 citation statements)

References 18 publications

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“…The codeposition of SiC particles smaller than 100 nm is more difficult than micron and submicron size particles [7,24,30,53]. Nanoparticles have a strong tendency to agglomerate due to their high activity [16].…”

Section: Effect Of Particle Size On the Codepositionmentioning

confidence: 99%

“…Due to their high wear resistance and low cost of ceramic powders, composite materials such as Ni-SiC manufactured by electro-codeposition method have been investigated to a greater extent and successfully commercialized in the automotive and aerospace industry, particularly for the protection of friction parts [5,6]. This process can be carried out using either Conventional Electro-Co-Deposition technique (CECD), in which the electrodes are positioned vertically in the plating cell, or by Sediment Electro-Co-Deposition (SECD), in which the electrodes are positioned horizontally one over the other with sufficient inter-electrode distance, so that the particles settle on the electrode surface as sediment on the cathode as the metal deposition progresses [7,8]. The latter has the advantage of yielding considerably higher volume% incorporation of particles in the deposit compared to the CECD technique for a given volume% of particles in the solution.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Surfactants on the Electrodeposition of Ni-SiC Composites

Narasimman

Pushpavanama

Periasamyb

2012

Port. Electrochim. Acta

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The effect of various surfactants on the volume% codeposition of SiC in a nickel matrix was evaluated. Of the various surfactants tried, tetra methyl ammonium hydroxide (TMAH) was found to be the best for improving the quality of the deposits as well as the homogenous distribution of particles and with reasonable volume% of silicon carbide incorporation in the matrix. Composites were produced using 1 µm and 50 nanometer size powders. The effect of silicon carbide concentration and bath operating variables on the volume% of SiC incorporation in the deposit and the deposition rates were estimated. Substantial improvement in mechanical properties such as hardness and wear resistance was obtained with the nano SiC composite compared to the micro SiC composite.

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Section: Effect Of Particle Size On the Codepositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Surfactants on the Electrodeposition of Ni-SiC Composites

Narasimman

Pushpavanama

Periasamyb

2012

Port. Electrochim. Acta

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“…The distance between anode and cathode was 7 cm. The coating area was 6.25 cm 2 . The composition of the bath and operating parameters for electrodeposition are CuCN-30 gpl; NaCN-45 gpl; Na 2 SnO 3 -42 gpl; NaOH-10 gpl; Temp-40 °C to 60 °C; pH-12.5; current density-1-5 A/dm 2 .…”

Section: Experimental Setup Used For the Present Studymentioning

confidence: 99%

“…The composition of the bath and operating parameters for electrodeposition are CuCN-30 gpl; NaCN-45 gpl; Na 2 SnO 3 -42 gpl; NaOH-10 gpl; Temp-40 °C to 60 °C; pH-12.5; current density-1-5 A/dm 2 . The plating parameters were optimized by varying current density from 1-5A/dm 2 , stirring speed from 50-300 rpm and temperature from 40-60 ºC. A fewer number of plating experiments were carried out using electroplating setup for deposition of Cu-Sn over mild steel substrate at CECRI, Karaikudi.…”

Section: Experimental Setup Used For the Present Studymentioning

confidence: 99%

“…The objective of this study is to obtain coatings of copper-tin over mild steel substrate. The electroplating parameters were studied [2] and a mathematical model is developed for the prediction of copper content in the coatings using SPSS15 software package. The results, with particular reference to the electroplating parameters of the bath, are also predicted using artificial neural networks and compared.…”

Section: Introductionmentioning

confidence: 99%

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Predictive Modeling of Copper in Electro-deposition of Bronze Using Regression and Neural Networks

Subramanian¹,

Periasamy²,

Pushpavanam³

et al. 2009

Port. Electrochim. Acta

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The aim of this research is to obtain electrodeposits of copper-tin over mild steel substrate. The plating parameters were studied and a model is developed using Artificial Neural Networks (ANN). The electrodeposition of copper-tin was carried out from an alkaline cyanide bath. Copper content of coatings in alloy deposition was determined by using X-ray fluorescence spectroscopy. The results were used to create a model for the plating characteristics and also for studies using ANN. The ANN model is compared with the conventional mathematical regression model for analysis.

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Can Metal Matrix‐Hydrophobic Nanoparticle Composites Enhance Water Condensation by Promoting the Dropwise Mode?

Damle

Sun

Rykaczewski

2015

Adv Materials Inter

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Incorporation of condensers treated with hydrophobic modifiers that promote the efficient dropwise condensation mode can significantly enhance the performance of power generation and desalination plants. However, this approach is not used in industry because of low thermal conductivity and limited durability of the thin hydrophobic coatings. Here, it is argued that metal matrix hydrophobic nanoparticle composites can be a robust and high thermal conductivity alternative to hydrophobic polymeric and ceramic thin films. By characterizing condensation on a wide range of mimicked composite surfaces, it is demonstrated that to promote dropwise condensation the filler nanoparticles must have size and spacing significantly smaller than the few micrometer average center‐to‐center separation distance between closest neighboring droplets prior to onset of the coalescence dominated growth stage. Furthermore, the nanoparticle density does not have to be high enough to make the surface hydrophobic, but only sufficiently high to reduce the contact angle hysteresis, and with that pinning of droplets during coalescence and gravity assisted shedding. Using experimental results in conjunction with condensation models, it is estimated that a substantial heat transfer enhancement can be achieved via promotion of sustained dropwise mode even by using copper and aluminum matrix composites fully loaded with polytetrafluoroethylene nanoparticles if the film thickness is below ≈0.5 mm.

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Electrodeposition of bronze–PTFE composite coatings and study on their tribological characteristics

Cited by 72 publications

References 18 publications

Effect of Surfactants on the Electrodeposition of Ni-SiC Composites

Effect of Surfactants on the Electrodeposition of Ni-SiC Composites

Predictive Modeling of Copper in Electro-deposition of Bronze Using Regression and Neural Networks

Can Metal Matrix‐Hydrophobic Nanoparticle Composites Enhance Water Condensation by Promoting the Dropwise Mode?

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