PLASMON MODE EXCITATION AND PHOTOLUMINESCENCE ENHANCEMENTON SILVER NANORIN
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Nanoparticle Adhesion and Removal
This special issue was conceived to honor Dr. Mittal on his 70th birthday. Then the question arose: What should be the topic/theme of such a special issue? It was a straightforward task as Dr. Mitt...
Heteropolymolybdate- amino acid hybrid materials: Synthesis and characterization
Polyoxometalates (POMs) as anionic early-transition-metal oxide clusters, bear many properties ranging from chemistry, catalysis and materials science to biology. Owing to their great potential antitumor and antiviral activities, polyoxometalate complexes have become attractive to both inorganic chemists and biochemis…
Interactions between high Nb containing TiAl alloy and yttria facecoat during investment casting
Using X-ray diffraction, hardness evaluation and scanning election microscopy, the interaction between a Ti–46Al–8Nb–B alloy and an yttria facecoat was analysed after investment casting with different cast bar diameters. Results showed that the interaction between an yttria facecoat and alloy can cause the oxygen in t…
Do protein structures evolve around ‘anchor’ residues?
We focus our analysis on the structural alignment of proteins from the trypsin family. Calculating basic summary statistics on the resulting aligned distance matrices revealed an interesting result. We discovered a set of residues where the distance between these specific residues and every other residue in each struc…
РАСЧЕТ ПОЛЕЙ ТЕМПЕРАТУР И ИХ ГРАДИЕНТОВ В ДОРОЖНЫХ БЕТОННЫХ ПОКРЫТИЯХ
Воздействие тепловых потоков на бетонные покрытия при различных климатических характеристиках районов строительства и эксплуатации дорожных одежд резко снижает их прочность, корозионно-, сдвиго- и морозоустойчивость, а в конечном итоге – долговечность. Причиной деформационных процессов является характер градиентных те…
Simulation of thermo-Elastics Properties of Thermal Barrier Coatings
Thermal barrier coatings are used to protect different parts in compressors and turbines from heat. They are generally composed of two layers, one metallic layer providing resistance to heat corrosion and oxidation, and one thermally insulating ceramic layer. Two different techniques are industrially used. Plasma spra…
Wetting Kinetics and Cooling Performance of PAG Polymer Quenchants
The present research work is aimed at the estimation of quench severity Polyalkylene Glycol (PAG) polymer quenchants having varying concentrations. An Inconel600 probe instrumented with thermocouples was used for this purpose. The thermal history at various locations in the probe was used as an input to the inverse he…
Effect of Process Parameters on Anodization of AA7075
The influence of the major process parameters for anodizing AA7075 is investigated to obtain an anodized layer with minimum porosity with approximately 15μm thickness. Anodization was carried out in a sulphuric acid bath with well-defined process parameters and the anodized layer thickness & Inter pore distance were m…
EIS Study and Role of Chloride Ions Concentration and Temperature on Passivity of AZ91D Mg Alloy
Mg alloy shows higher specific strength and ductility relative to aluminum and also lower machining and casting costs over to steels. However, it also shows limitation to use in many industrial applications due to the relatively poor corrosion resistance in many aqueous solutions.Corrosion and passivation study of mag…
Evaluation of Mechanical Properties of the Rocket Thrust Chamber Material under Flight Conditions
Thrust chamber of rocket engines often operate under conditions of rapid heating environments with temperatures approaching the melting points of the materials involved. Therefore, for the optimum design of rocket engines, it is necessary to obtain the properties of thrust chamber materials under actual operating cond…
Synthesis and Characterization of Nanostructured Tungsten-30 Atomic % Chromium Produced by Mechanical Attrition and Hydrogen Sintering
Nanostructured W70Cr30 powders were produced by mechanical alloying (MA) of elemental tungsten (W), Chromium (Cr) powders in a high energy planetary ball-mill using tungsten carbide as grinding media and toluene as a process control agent. The crystallite size and lattice strain of the nanostructured powders at differ…
High Specific Strength Carbon Foam Prepared from Sucrose and Multi-Walled Carbon Nanotube
Multi-walled carbon nanotube (MWNT) reinforced carbon foams were prepared by thermo-foaming of MWNT dispersions in molten sucrose followed by dehydration and carbonization. The rheological studies showed that the uniform dispersion of MWNT was achieved up to 1.5 wt.%. The carbon foams showed cellular structure. The de…
Enhanced Transport Current in MgB2 Superconducting Wire through Metallic Fe Addition
The structural and superconducting properties of iron sheathed mono-filamentary superconducting wires of MgB2 with and without Fe addition processed at a relatively low temperature of 600 °C were investigated. The transport critical current density (JC) of the superconducting composite wires is found to increase stead…
Micropatterning of Polystyrene-Alumina Nanocomposite Film by Non-Solvent Induced Phase Separation
The objective of the present study is to fabricate micropatterned polystyrene-alumina nanocomposite (PAN) film by immersing the casted PAN/toluene solution into the bath of a non-solvent of the polymer. Immediate precipitation occurs and creates concavities on the surface of PAN cast after drying due to phase separati…
Green Route Synthesis, Structural and Luminescence Studies of Mg-Doped Y2O3 Nnanophosphor
We report the synthesis of Y2O3:Mg2+ (0.5-9mol %) nanoparticles (NPs) with different morphologies via ecofriendly, inexpensive and simple low temperature solution combustion method using Aloe Vera gel as fuel. The formation of different morphologies was characterized by PXRD, SEM, UV-Visible, PL techniques etc. The PX…
Optimization and Characterization of Manganese Coating on Cu-Cr-Zr-Ti Alloy
In this study, the deposition of Manganese (Mn) on Cu-Cr-Zr-Ti alloy was carried out using electro plating route. The purpose of this coating is to join copper alloys utilizing eutectic reaction between Cu and deposited Mn. Mn coating through electro deposition is difficult due to very high electronegativity. Two diff…
Influence of Reactivity of Sheath Metals on the Superconducting Properties of NdFeAsO0.6F0.4 Wires
The influence of reactivity of different sheath metals such as Ag, Fe, Cu, Ni and SS on the superconducting properties of NdFeAsO0.6F0.4 wires has been investigated. The observed structural and superconducting properties of the metal sheathed wires conclude that among the five candidates Ag and Fe are technically comp…
Effect of Si on the Microstructure and Mechanical Properties of Mg-2Sb Alloy
In the present work the effects of Si (0.5, 1, 1.5 wt%) on the as cast microstructure of Mg-2Sb alloy have been investigated. Si addition forms new Mg-Sb-Si ternary compound in Mg-Sb alloys besides the morphology of Mg3Sb2 changes from needle to chinese scripted and polygonal shaped Mg-Sb-Si ternary compound. The impr…
Facile Approach for the Development of Burly Starch- Silver Hydrogel Nanocomposites for Antimicrobial Applications
This paper presents the development of silver nanoparticles entrapped starch-polyacrylic acid hydrogel by a one step facile strategy. Formation of silver nanoparticles was confirmed by TEM and SPRE. Hydrogen bond interaction present in the hydrogel network was manifested from the FTIR spectroscopy. Silver nanoparticle…