Srivastava, Meenu, William, Gripps VK, Jain, Anjana, Rajam, KS
Ni–Co composites incorporated with SiC particles of nano and micron size were produced by electrodeposition. The effect of cobalt content on the particle incorporation, microhardness, surface...
A comparative study of reactive direct current magnetron sputtered CrAlN and CrN coatings (2006)
Barshilia, Harish C, Selvakumar, N, Deepthi, B, Rajam, KS
Approximately 1.5 μm thick CrN and CrAlN coatings were deposited on silicon and mild steel substrates by reactive direct current (DC) magnetron sputtering. The structural and mechanical properties...
Barshilia, Harish C, Deepthi, B, Rajam, KS
Superhard nanocomposite coatings of TiAlN/Si3N4 with varying silicon contents were synthesized using reactive direct current (DC) unbalanced magnetron sputtering. The Si and TiAl targets were...
Reactive sputtering of hard nitride coatings using asymmetric-bipolar pulsed DC generator (2006)
Barshilia, Harish C, Rajam, KS
Hard coatings of TiN, CrN, TiAlN and Si3N4, which exhibit a large variation in their electrical resistivities, have been prepared in an unbalanced magnetron sputtering system using an...
Barshilia, Harish C, Deepthi, B, Prabhu, ASA, Rajam, KS
Approximately 1.5-μm-thick superhard nanocomposite coatings of TiN/Si3N4 with varying silicon contents were deposited on silicon and stainless steel (SS 304) substrates by reactive direct current...
Studies on electroless Ni-W-P and Ni-W-Cu-P alloy coatings using chloride-based bath (2006)
Balaraju, JN, Jahan, SM, Anadan, C, Rajam, KS
In the present investigation ternary electroless Ni-W-P alloy coatings were prepared using alkaline citrate-based bath. Nickel chloride and sodium tungstate were used as nickel and tungsten sources,...
William Grips, VK, Barshilia, Harish C, Ezhil Selvi, V, Rajam, KS
The corrosion behaviors of single layer TiN, CrN, TiAlN and multilayer TiAlN/CrN coatings, deposited on steel substrate using a multi-target reactive direct current magnetron sputtering process, were...
Barshilia, Harish C, Rajam, KS, Anjana, Jain, Gopinadhan, K, Chaudhary, Sujeet
Nanolayered multilayer coatings of TiN/NbN and TiAlN/TiN were deposited on Si (100) substrates at various modulation wavelengths (i.e.bilayer thickness, K) using a reactive direct current magnetron...
Corrosion resistance and microstructure of electrodeposited nickel-cobalt alloy coatings (2006)
Srivastava, Meenu, Ezhil Selvi, V, William Grips, VK, Rajam, KS
Ni-Co alloys with varying cobalt content were electrodeposited employing sulphamate electrolyte. The changes in microstructure and corrosion behavior of electrodeposited nickel with respect to cobalt...
Corrosion resistance and microstructure of electrodeposited nickel-cobalt alloy coatings (2006)
Srivastava, Meenu, Ezhil Selvi, V, William Grips, VK, Rajam, KS
Ni-Co alloys with varying cobalt content were electrodeposited employing sulphamate electrolyte. The changes in microstructure and corrosion behavior of electrodeposited nickel with respect to cobalt...
High phosphorus electroless nickel bath has been used to prepare composite coatings containing alumina powders (50 nm, 0.3 μm and 1.0 μm). Deposits were characterized for its structure,...
Studies on autocatalytic deposition of ternary Ni-W-P alloys using nickel sulphamate bath (2006)
Balaraju, JN, Jahan, SM, Rajam, KS
An attempt has been made to deposit ternary Ni-W-P coatings autocatalytically using nickel sulphamate and sodium tungstate as nickel and tungsten sources, respectively, and sodium hypophosphite as a...
Tiaintiaion Si3 N4 tandem absorber for high temperature solar selective applications (2006)
Barshilia, Harish C, Selvakumar, N, Rajam, KS, Rao, Sridhara DV, Muraleedharan, K, Biswas, A
A tandem absorber of Titainion Si3 N4 is prepared using a magnetron sputtering process. The graded composition of the individual component layers of the tandem absorber produces a film with a...
William Grips, VK, Ezhil Selvi, V, Barshilia, Harish C, Rajam, KS
The electrochemical behavior of single layer TiN, CrN, TiAlN and multilayer TiAlN/CrN coatings, deposited on steel substrates using a multi-target reactive direct current (dc) magnetron sputtering...
Barshilia, Harish C, Rajam, KS
Nanolayered multilayer coatings of TiAlN/TiN and TiN/NbN were deposited on Si (100) substrates at various modulation wavelengths (i.e., bilayer thickness,A) using a reactive dc magnetron sputtering...
Aruna, ST, Diwakar, S, Jain, A, Rajam, KS
Nickel was deposited galvanostatically at & middot;23, 0·77, 1·55, 3·1 and 5·4 A dm-2 current densities at room temperature. An XRD technique was employed for evaluating...
Barshilia, Harish C, Rajam, KS, Sridhara Rao, DV
Multilayer coatings of TiN/NbN with a modulation wavelength of about 8 nm were prepared on silicon (100) and tool steel substrates at low deposition temperature (approximately 100 °C) using a...
Barshilia, Harish C, Rajam, KS, Jain, Anjana, Gopinadhan, K, Chaudhary, Sujeet
Nanolayered multilayer coatings of TiN/NbN and TiAlN/TiN were deposited on Si (100) substrates at various modulation wavelengths (i.e.bilayer thickness, K) using a reactive direct current magnetron...
Structure, hardness and thermal stability of TiAlN and nanolayered TiAlN/CrN multilayer films (2005)
Barshilia, Harish C, Surya Prakasha, M, Jain, Anjana, Rajam, KS
TiAlN films were deposited on silicon (1 1 1) substrates from a TiAl target using a reactive DC magnetron sputtering process in Ar+N2 plasma. Films were prepared at various nitrogen flow rates and...
Optical oxygen sensor coating based on the fluorescence quenching of a new pyrene derivative (2005)
Basu, Bharathibai J, Thirumurugan, A, Dinesh, AR, Anandan, C, Rajam, KS
A new pyrene derivative 1-decyl-4-(1-pyrenyl) butanoate (DPB) was synthesized by the esterification reaction of 1-pyrene butyric acid with n-decanol. The photophysical properties of this pyrene ester...
Morphological study of ternary Ni-Cu-P alloys by atomic force microscopy (2005)
Balaraju, JN, Anandan, C, Rajam, KS
Ternary electroless Ni-Cu-P alloy films were deposited by using nickel sulphate (B1)- and nickel chloride (B2)-based alkaline baths. Alloy films were characterized for their structure, morphology,...
Electroless deposition of ternary Ni-W-P alloys from sulphate and chloride based baths (2005)
Balaraju, JN, Anandan, C, Rajam, KS
The present investigation focuses on the preparation of ternary electroless Ni-W-P alloy deposits using sulphate (B1) and chloride (B2) based baths. The characteristics of the deposits were studied...
Aruna, ST, Diwakar, S, Anjana, Jain, Rajam, KS
Nickel was deposited galvanostatically at 0·23, 077, 1·55, 3·1 and 5·4 A dm-2 current densities at room temperature. An XRD technique was employed for evaluating the grain...
Aruna, TS, Diwakar, S, Jain, A, Rajam, KS
Nickel was deposited galvanostatically at 0·23, 077, 1·55, 3·1 and 5·4 A dm-2 current densities at room temperature. An XRD technique was employed for evaluating the grain...
Electrodeposition of Ni-Co alloys from sulphamate bath (2005)
Srivastava, Meenu, William Grips, VK, Rajam, KS
Electrodeposited nickel is being employed in various fields like aerospace, communications, electronics and automotive industries. Co-deposition of cobalt with nickel increases the hot hardness by...
Electrodeposition of Ni-Co alloys from sulphate bath (2005)
Srivastava, Meenu, William Grips, VK, Rajam, KS
Electrodeposited nickel is being employed in various fields like aerospace, communications, electronics and automotive industries. Co-deposition of cobalt with nickel increases the hot hardness by...
Mixture of fuels approach for the solution combustion synthesis of Al2O3–ZrO2 nanocomposite (2004)
A modified solution combustion approach was used for the first time in the preparation of nanosize zirconia toughened alumina (ZTA) composite. ZTA-1 with an average particle size of 37 nm was...
Superhard nanocomposite coatings of TiN/a-C prepared by reactive DC magnetron sputtering (2004)
Barshilia, Harish C, Surya Prakash, M, Sridhara Rao, DV, Rajam, KS
Single layer TiN coatings were prepared on silicon (111) substrates using a multi-target reactive DC magnetron sputtering process at various nitrogen flow rates and substrate biases. TiN coatings...
Structure, hardness and thermal stability of TiAlN and nanolayered TiAlN/CrN multilayer films (2004)
Barshilia, Harish C, Surya Prakash, M, Anjana, Jain, Rajam, KS
TiAlN films were deposited on silicon (1 1 1) substrates from a TiAl target using a reactive DC magnetron sputtering process in Ar+N2 plasma. Films were prepared at various nitrogen flow rates and...
Barshilia, Harish C, Surya Prakash, M, Aithu, Poojari, Rajam, KS
Nanocomposite coatings of TiN/a-C were prepared on tool steel substrates using a multitarget reactive DC magnetron sputtering process at various TiN layer thicknesses (0.6–2.8 nm). The a-C layer...
Barshilia, Harish C, Rajam, KS
About 1.5-um-thick single-layer TiN, CrN, TiAlN coatings and nanolayered TiN/CrN, TiAlN/CrN multilayer coatings were deposited on silicon (111) substrates using a reactive direct current magnetron...
Nanoindentation and atomic force microscopy measurements on reactively sputtered TiN coatings (2004)
Barshilia, Harish C, Rajam, KS
Titanium nitride (TiN) coatings were deposited by d.c. reactive magnetron sputtering process. The films were deposited on silicon (111) substrates at various process conditions, e.g. substrate bias...
Barshilia, Harish C, Surya Prakash, M, Aithu, Poojari, Rajam, KS
TiN, NbN and TiN/NbN multilayer coatings were deposited on tool steel substrates using a reactive DC magnetron sputtering process. The coatings were characterized using X-ray diffraction,...
Barshilia, Harish C, Prakash, MS, Poojari, A, Rajam, KS
TiN, NbN and TiN/NbN multilayer coatings were deposited on tool steel substrates using a reactive DC magnetron sputtering process. The coatings were characterized using X-ray diffraction,...
Structure and properties of reactive DC magnetron sputtered TiN/NbN hard superlattices (2004)
Barshilia, Harish C, Rajam, KS
Nanostructured TiN/NbN superlattices at various modulation wavelengths (?) were deposited on silicon (111) and tool steel substrates using a reactive DC magnetron sputtering process. Structural...
Basu, Bharathibai J, Rajam, KS
Pyrene and its derivatives find application as fluorescent probes for monitoring the oxygen concentrations in air and various fluids. Photophysical characteristics of some commercially available...
Mixture of fuels approach for the solution combustion synthesis of Al 2O3-ZrO2 nanocomposite (2004)
A modified solution combustion approach was used for the first time in the preparation of nanosize zirconia toughened alumina (ZTA) composite. ZTA-1 with an average particle size of ?37nm was...
Anandan, C, Basu, Bharathibai J, Rajam, KS
The diffusion phenomenon of pyrene in silicone coatings prepared from various commercial silicone resins with different viscosities was investigated using steady state excimer fluorescence technique....
Nanoindentation and atomic force microscopy measurements on reactively sputtered TiN coatings (2004)
Barshilia, Harish C, Rajam, KS
Titanium nitride (TiN) coatings were deposited by d.c. reactive magnetron sputtering process. The films were deposited on silicon (111) substrates at various process conditions, e.g. substrate bias...
Anandan, C, Basu, Bharathibai J, Rajam, KS
The concentration dependence of the diffusion coefficient of pyrene in single component and two-component room temperature curing silicone polymer coatings is investigated by the steady state...
Application of luminescent coatings for surface pressure measurements. (2004)
Basu, Bharathibai J, Anandan, C, Rajam, KS
In recent times, certain luminescent coatings, more popularly known as pressure sensitive paints (PSP) are increasingly used for the measurement of surface pressure distribution on wind tunnel...
Deposition of TiN/CrN hard superlattices by reactive d.c. magnetron sputtering (2003)
Barshilia, Harish C, Rajam, KS
Multilayer superlattice coatings of TiN/CrN were deposited on silicon substrates using a reactive d.c. magnetron sputtering process. Superlattice period, also known as modulation wavelength (?), was...
Structure, hardness and thermal stability of nanolayered TiN/CrN multilayer coatings (2003)
Barshilia, Harish C, Rajam, KS, Jain, Anjana
Nanolayered TiN/CrN multilayer coatings were deposited on silicon substrates using a reactive DC magnetron sputtering process at various modulation wavelengths (?), substrate biases (VB) and...
Study of the mechanism of degradation of pyrene-based pressure sensitive paints (2003)
Basu, Bharathibai J, Anandan, C, Rajam, KS
Even though pyrene-based pressure sensitive paints have some special advantages like high quantum efficiency, good pressure sensitivity and low temperature sensitivity, these paints exhibit steady...
Structure, hardness and thermal stability of nanolayered TiN/CrN multilayer coatings (2003)
Barshilia, Harish C, Rajam, KS, Jain, Anjana
Nanolayered TiN/CrN multilayer coatings were deposited on silicon substrates using a reactive DC magnetron sputtering process at various modulation wavelengths (?), substrate biases (VB) and...
Synthesis, characterisation and properties of Ni/PSZ and Ni/YSZ nanocomposites (2003)
Nanocrystalline partially stabilised zirconia (PSZ) and yttria-fully stabilised zirconia (YSZ) powders were prepared by solution combustion process. Nanocrystalline nature of the powders was...
Deposition of TiN/CrN hard superlattices by reactive d.c. magnetron sputtering (2003)
Barshilia, Harish C, Rajam, KS
Multilayer superlattice coatings of TiN/CrN were deposited on silicon substrates using a reactive d.c. magnetron sputtering process. Superlattice period, also known as modulation wavelength (L), was...
Nanolayered TiN/NbN Multilayers as New Superhard Materials (2003)
Barshilia, Harish C, Rajam, KS
Nanolayered multilayer coatings of TiN/NbN on silicon and tool steel substrates were deposited using a reactive DC magnetron sputtering process. Judicious control of process parameters enabled the...
Characterization of CuyNi multilayer coatings by nanoindentation and atomic force microscopy (2002)
Barshilia, Harish C, Rajam, KS
Cu/Ni multilayer coatings prepared by RF/DC magnetron sputtering process were characterized using x-ray diffraction (XRD), nanoindentation and atomic force microscopy (AFM) techniques. Films...
Characterization of Cu/Ni multilayer coatings by nanoindentation and atomic force microscopy (2002)
Barshilia, Harish C, Rajam, KS
Cu/Ni multilayer coatings prepared by RF/DC magnetron sputtering process were characterized using x-ray diffraction (XRD), nanoindentation and atomic force microscopy (AFM) techniques. Films...
Anandan, C, William Grips, VK, Rajam, KS, Jayaram, V, Bera, P
Solar selective black chromium coating was electrodeposited on pre-treated electroformed nickel substrates from a hexavalent chromium containing bath. The composition of the film was investigated...
A jig for holding components for electroplating (2001)
Rajam, KS, Indira, Rajagopal, Rajagopalan, SR, Santosh Kumar, Jayaram
A jig for holding a component to be selectively electroplated, which comprises a body (3), having at the inner side of its top a groove (7) to house a gasket (2) at lesat two perpendicular stems (9)...
An improved electroplating process for the preparation of soft nickel plated sealing disc. (2000)
Indira, Rajagopal, Rajam, KS, Santosh Kumar, Jayaram, Pourassamy, Annamalai, Rama Rajagopalan, Sundarapandium
An improved electroplating process for the preparation of soft nickel plated-sealing disc which compriseselectroplating the sealing disc in a known manner, in an electroplating cell, comprising of a...
An improved bath for electroplating soft nickel. (1999)
Indira, Rajagopal, Rajam, KS, Rajagopalan, SR
A composition for electroplating soft nickel which consists of : nickel sulphamate concentrate 800-900 ml/l (containing 600g /l) boric acid 20-30 g/l, nickel chloride 5-10 g/l sodiumlauryl sulphate...
Measuring the Covering Power of a Tin Plating Bath Using Scanning Electron Microscopy (1996)
Rajam, KS, Rajagopal, Indira, Rajogopalan, SR, Krishnan, RV
For electroplating articles with a complex shape, it is essential that the plating bath should (1) cover the contoured surface in a short time and (2) produce a uniform thickness preferably over the...
Rajam, KS, Rajagopal, Indira, Rajagopalan, SR, Viswanathan, B
Results of XRD and DSC studies on electroless Ni-P deposits obtained from two types of alkaline baths containing ethanolamines are discussed. One type (called CT-EN) employed citrate as a complexant,...
Studies on black nickel (1990)
Rajagopal, Indira, Rajam, KS, Rajagopalan, SR
Black nickel deposits are produced from baths containing nickel, zinc and thiocyanate. The deposits obtained at low c. d. appear grey and those obtained at high c. d. exhibit vivid colours...
Indira, Rajagopal, William Grips, VK, Rajam, KS, Rajagopalan, SR
A descaling bath removing scales from components of diesel engines comprising an aqueous solution containing (i) amino carboxylic acid 2-15%by wt (ii) alkali metal saltsof aliphatic dihydroxy mono...
Electroless nickel deposition from triethanolamine baths. Part I. Bath characteristics (1990)
Rajam, KS, Rajagopal, Indira, Rajagopalan, SR
The effectiveness of ethanolamines in electroless nickel plating is studied. It is shown that triethanolamine can be used effectively in place of ammonia in citrate based alkaline electroless nickel...
Studies on electroless nickel baths - Part II (1988)
The feasibility of using ethanolamine in alkaline glycine based electroless nickel baths has been investigated. It is seen that electroless nickel can be deposited from such baths. The properties of...
Metal finishing challenges in the fabrication of radio telescopes (1986)
Rajagopal, Indira, Lakshminarayan, V, Rajam, KS, Rajagopalan, SR
The Raman Research Institute, Bangalore, India, has set up two radio telescopes (10. 4 m and 1. 5 m) for millimeter wave radio astronomy. Fabrication of these telescopes posed several challenges in...
Studies on electroless nickel baths (1986)
The feasibility of substituting ammonia in alkaline electroless nickel bath has been investigated. It is shown that ethylene diamine can be used instead of ammonia. However, such a bath has a narrow...
Studies on electroless nickel baths (1986)
The feasibility of substituting am monia in alkaline electroless nickel bath has been investigated. It is shown that ethylene diamine can be used instead of am monia. However, such a bath has a...