Facilitating the Application of Starch Paste in the Conservation of Paper Artworks
Adsorption & Kinetic Studies on Removal of Chromium from Waste Water using Tea Waste as Biosorbent
Corrosion: Types, Theories and Preventive Measure
A Comparative Study of Thermal Enhanced Oil Recovery Method
An Overview of Corrosion in the Oil and Gas Industry: Challenges and Solutions
An Investigation on Recent Trends in Metamaterial Types and its Applications
A Review on Plasma Ion Nitriding (PIN) Process
A Review on Friction and Wear Behaviors of Brake’s Friction Materials
Comparative Parabolic Rate Constant and Coating Properties of Nickel, Cobalt, Iron and Metal Oxide Based Coating: A Review
Electro-Chemical Discharge Machining- A review and Case study
Electrical Properties of Nanocomposite Polymer Gels based on PMMA-DMA/DMC-LiCLO2 -SiO2
Comparison Of Composite Proton Conducting Polymer Gel Electrolytes Containing Weak Aromatic Acids
Enhancement in Electrical Properties of PEO Based Nano-Composite Gel Electrolytes
Effect of Donor Number of Plasticizers on Conductivity of Polymer Electrolytes Containing NH4F
PMMA Based Polymer Gel Electrolyte Containing LiCF3SO3
The outcome of machining boundary on cutting forces of C-45 steel workpiece using Aluminum oxide coated and uncoated Tungsten carbide tool is used for experimentation and numerical. The experimentation conveyed for measuring the surface roughness on workpiece had been performed by using a surface roughness tester and resultant forces have been measured using Kistler dynamometer. This study is carried out with L27 orthogonal design to evaluate the effect of machining parameters on the surface roughness and resultant forces with coated tools (TiN and Al2O3). Analysis of 2D unsteady state forces and surface roughness in a turning process is carried out by using Marc FEA code. The smallest tool wear had been identified by the Al2O3 coated tool. It covers a study on cutting forces and surface roughness of modeling and numerical in turning of workpiece using coated and uncoated carbide tools by finite element technique.
The applications of microwave energy in material processing are a growing field and new applications are being innovated. It is one of the most sustainable and novel processing methods and has distinct advantages over various conventional material processing methods. With the development of microwave energy processing and selective heating mechanism, it combines microwave energy with conventional sources and balances process variables such as electric power, process flow, processing time, and fixturing requirements. It makes the process more versatile to almost all types of materials and its alloys, non-metals, composite materials like Metal Matrix Composites (MMC), Ceramics Matrix Composites (CMC), and Polymer Matrix Composites (PMC), cermets, fiber reinforced plastics, so on. The present work is based on the development of a sustainable joining methodology for the indigenously developed MMC (Al6061+5% SiC), also termed as Aluminium Metal Matrix Composites (AMMC), through microwave energy processing. The results have revealed that joining “Al6061 + 5% SiC” is successful using “pure Al powder and blumer” with a processing time of 600 seconds. In this study, various joint cross-sections such as simple butt joint, single-V butt joint, double-V butt joints were performed to obtain the best results in terms of joining strength and rigidity.
The empirical relationship used to predict the radius of curvature of a thin bimetallic strip at ambient temperature is flat, but it curves into an arc at a higher temperature, which is presented in this paper. The formula is validated with the finite element model (FEM) and its performance is compared with other models that exist in literature. Timoshenko in his paper on Bimetallic Thermostats has formulated the model for the radius of curvature. The Khatkhate Singh Mirchandani (KSM) formula presented here is derived from the Angel and Haritos approximation by introducing the KhaSinMir constant. Furthermore, the formula has been modified to make it independent of the elastic moduli. The simulation results and the excellent agreement with the Timoshenko formula are developed. The RMSE and χ2 errors are very well within the stipulated limits and are an encouraging sign for the use of this formula. Also, the KSM model shows very good correlation with the Timoshenko formula for most commonly used bimetallic combination. i.e., Invar36 and Brass.
Polycrystalline nanostructured SnO thin films were synthesized using two precursors of tin at 353 K on glass substrates by 2 successive ionic layer adsorption and reaction (SILAR) technique. The annealing effect of the films has been investigated. Off-white colored porous films exhibited a different morphology with grain sizes in 4-8 nm range. The effect of crystallite-size and strain induced broadening of the XRD profile films have been studied using Williamson and Hall technique (W-H plot). Lattice parameters such as c/a ratio, cell volume, texture coefficient, microstrain and dislocation density were determined. Films show more than 55% transmittance and <20% reflectance in the entire Vis-NIR regions. Band gap of the as-grown films were blue-shifted. Refractive index, extinction coefficient and the porosity were deducted from the optical data. The electrical resistivity of the film lies in the range of 101-103 cm. Annealing enhanced the characteristic properties of the films except the reduction in the optical band gap.
Europium oxide doped boro tellurite glasses of different compositions have been synthesized by using melt quenching procedure. The synthesized glasses contain a composition of (70-x) B2O3-15TeO2 -10Na2O-5PbO-xEu2O3 with x = 0, 0.1, 0.3, and 0.4 mol%. Raman spectroscopic investigations on prepared glasses have been carried out to study the structures and vibrations of atoms in the glass network. By Raman spectra, it is clear that the prepared glass samples are possessing the boroxol rings and also found the different vibrations in Te-O-Te bonds. The emission spectra were done by spectrofluorometer techniques to investigate the luminescent properties of these glasses with excitation wavelength as 394 nm and emission wavelength as 612 nm.
Nowadays, a lot of research is on the way to reuse or convert the energy losses. In recent years the most problem in any device is energy loss in the form of waste heat. Thermoelectric materials are a good choice to get rid of this problem. Researchers are more interested in thermoelectric materials because of their thermoelectric effect that is the conversion of energy between thermal and electricity. The present invention provides a thermoelectric material that has high thermoelectric power and high figure of merit, which can be used in thermoelectric power sources. Therefore the current work is carried out on the principle of thermoelectric materials, its performance and their applications. Bismuth Selenide is a good thermoelectric material and a topological insulator. Bismuth selenide thin films are widely used in thermoelectric devices, which can generate electricity from unused heat. This study explores the preparation of Bismuth Selenide thin films by various methods. This review work observes the effects on thin film by taking different types of substrate. It has therefore been concluded that better results will be achieved by new experimental works on different parameters of Bismuth Selenide material and their thin films.
Most of the lubricants pose a potential risk to the environment. There is an urgent need and development of low cost, environmental friendly alternatives. In machining processes, lubricants play multiple roles, apart from lubricating, the fluid acts as a cutting oil too and its other purposes include increasing tool life, smoother cutting action, better chip removal and improved surface finish. Traditionally mineral oils, cutting oils, mixtures of mineral + cutting oils and chemicals are used in different proportions along with additives. Through this paper, a practical case study on drilling, tapping and reaming for an industrial use on stainless steel 316 grade manifold blocks, using different lubricants has been elaborated. Some improvements in surface roughness have also been noticed. The study presents an innovative approach, using a natural-organic source that can be easily disposed of without causing any harm; additionally, its fragrance motivates and energizes the morale and ambiance of the work area under consideration. The roughness average values using coffee, as the lubricant gave better results (improvement from 5 to 11%) than other oils used in the experiments.