scispace - formally typeset
Search or ask a question
Author

B. Ramamoorthy

Bio: B. Ramamoorthy is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Electroless nickel & Coating. The author has an hindex of 7, co-authored 9 publications receiving 372 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the effect of surfactants on the surface roughness, microhardness and microstructure of electroless Nickel-Phosphorus (EN) surface protective coating obtained from an alkaline bath is presented.
Abstract: Electroless nickel (EN) coating is a well established surface engineering process that involves deposition of a metal–metalloid alloy coating on various substrates. The effect of surfactants on the surface roughness, microhardness and microstructure of electroless Nickel–Phosphorus (EN) surface protective coating obtained from an alkaline bath is presented in this paper. In this study the influence of surfactants sodium dodecylsulfate (SDS) and cetyl trimethyl ammonium bromide (CTAB) on the surface roughness, microhardness and microstructure of coated samples are investigated. EN deposits with addition of surfactant SDS and CTAB at a concentration of 0.6 g/l produce a smooth surface and the average roughness value (Ra) is 1.715 µm for SDS and 1.607 µm for CTAB which is less than the Ra value of EN deposit without surfactant addition (1.885 µm). The mean average roughness value (Ra) with addition of surfactant is 1.796 µm. It was found that without surfactant the micro hardness value of as-coated condition was 450 Hv. The micro hardness value increased to 685 Hv with addition of SDS and 675 Hv with addition of CTAB. The complete experimental details, results obtained and their analysis is presented in this paper.

97 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of surfactants sodium dodecyl sulphate (SDS) and cetyltrimethyl ammonium bromide (CTAB) on the surface roughness, surface morphology and surface topography of electroless nickel (EN)-phosphorus surface protective coating obtained from an alkaline bath was investigated.

80 citations

Journal ArticleDOI
TL;DR: In this article, the relative influence of different types of coatings and different operating parameters on cutting performance in machining hardened steel with minimum fluid application was analyzed using statistical design of experiments.

76 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of process parameters such as stabilizer concentrations and plating bath temperature of the electroless Ni-P on efficiency and crystallinity are investigated, and the integral breadth, crystallite size, microstrain and the relative proportions of amorphous and crystalline phases present in the coating are obtained using the X-ray diffraction technique.

59 citations

Journal ArticleDOI
TL;DR: In this article, the effect of the uncoated and TiN coating by reactive magnetron sputtering on EN31 rollers in burnishing with varying process parameters such as burnishing speed, feed, burnishing force, number of passes upon surface roughness of EN24 steel work material was investigated.

42 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this article, the authors focus on the recent development in the synthesis, property characterization and application of aluminum, magnesium, and transition metal-based composites reinforced with carbon nanotubes and graphene nanosheets.
Abstract: One-dimensional carbon nanotubes and two-dimensional graphene nanosheets with unique electrical, mechanical and thermal properties are attractive reinforcements for fabricating light weight, high strength and high performance metal-matrix composites. Rapid advances of nanotechnology in recent years enable the development of advanced metal matrix nanocomposites for structural engineering and functional device applications. This review focuses on the recent development in the synthesis, property characterization and application of aluminum, magnesium, and transition metal-based composites reinforced with carbon nanotubes and graphene nanosheets. These include processing strategies of carbonaceous nanomaterials and their composites, mechanical and tribological responses, corrosion, electrical and thermal properties as well as hydrogen storage and electrocatalytic behaviors. The effects of nanomaterial dispersion in the metal matrix and the formation of interfacial precipitates on these properties are also addressed. Particular attention is paid to the fundamentals and the structure–property relationships of such novel nanocomposites.

877 citations

Journal ArticleDOI
TL;DR: The development of metal deposition processes based on electroless nickel, alloy and composite coatings on various surfaces has witnessed a surge in interest among researchers, with many recent applications made possible from many excellent properties as mentioned in this paper.

680 citations

Journal ArticleDOI
TL;DR: In this article, the authors reviewed the tribological advancement of different electroless nickel coatings based on the bath types, structure and also the tribo testing parameters in recent years.

477 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present an overview of major advances in techniques such as minimum quantity lubrication (MQL)/near dry machining (NDM), high pressure coolant (HPC), cryogenic cooling, compressed air cooling and use of solid lubricants/coolants.
Abstract: The past century has witnessed significant advancements in turning process, cutting tools, machine controls and coolant/lubricant chemistry. These developments have particularly enhanced the machining of difficult-to-cut materials, which are used for aerospace, steam turbine, bearing industry, nuclear and automotive applications. In turning operation, friction and heat generation at the cutting zone are the frequent problems, which affect the tool life and surface finish apart from other machining results. This mechanism of heat generation plays quite a negative role during the turning of modern materials due to their peculiar characteristics such as poor thermal conductivity, high strength at elevated temperature, resistance to wear and chemical degradation. A good understanding of the methods of lubrication/cooling at the cutting zone, reduction of heat generation will lead to efficient and economic machining of these modern materials. This paper presents an overview of major advances in techniques as minimum quantity lubrication (MQL)/near dry machining (NDM), high pressure coolant (HPC), cryogenic cooling, compressed air cooling and use of solid lubricants/coolants. These techniques have resulted in reduction in friction and heat at the cutting zone, hence improved productivity of the process. A brief survey of modeling/FEA techniques is also performed.

438 citations

Journal ArticleDOI
TL;DR: In this article, a review of the available literature on lubrication techniques during machining processes was conducted, and the performance and drawback of each technique were highlighted based on the machining conditions.

241 citations