Optimization of Adsorption Parameters for Lead (II) Removal from Wastewater using Box-Behnken Design
Optimization of Al 6063 Button Head Rivet FEM Analysis Subjected to CRYO ECAP and RT ECAP
Effect of (SiC+Gr) Addition on the Corrosion Behavior of Powder Metallurgy Copper MMC
Assessment of Reuse Potential of Low-Grade Iron Ore Fines through Beneficiation Routes
Characterization of Copper MMC Reinforced with SiC and Graphite in Equal Proportion Made by the Powder Metallurgy Route
Evaluation and Comparison of Turning Process Performance during Machining of D2 Steel Material under Two Sustainable Machining Techniques
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
Comparison Of Composite Proton Conducting Polymer Gel Electrolytes Containing Weak Aromatic Acids
Enhancement in Electrical Properties of PEO Based Nano-Composite Gel Electrolytes
Electrical Properties of Nanocomposite Polymer Gels based on PMMA-DMA/DMC-LiCLO2 -SiO2
Effect of Donor Number of Plasticizers on Conductivity of Polymer Electrolytes Containing NH4F
PMMA Based Polymer Gel Electrolyte Containing LiCF3SO3
The organic-inorganic hybrid consisting of cobalt complex attached to Keggin type phosphotungstic acid (H3PW12O40), by ionic interaction was synthesized and characterized by FT-IR (Fourier Transform Infrared), elemental analysis, SEM (Scanning Electron Microscope), EDX (Energy Dispersive X-ray Analysis), powder-XRD (X-Ray Diffraction), and DRUV-Vis. The synthesized cobalt complex [Co(ethyldm)3]Cl2 (where ethyldm=ethylenediamine) was immobilized by phosphotungstic acid (H3PW12O40) in solvothermal condition, thus synthesizing a new organic-inorganic hybrid [Co(ethyldm)3(HPW12O40)]. The [Co(ethyldm)3]Cl2 and [Co(ethyldm)3(HPW12O40)] were studied for their catalytic activity for oxidative conversion of 1,2,3,4-tetrahydronaphthalene (tetralin). The hybrid [Co(ethyldm)3(HPW12O40)] was used multiple times to catalyse the substrate. The catalytic activity of [Co(ethyldm)3]Cl2 and [Co(ethyldm)3(HPW12O40)] as heterogeneous catalyst were monitored by Gas Chromatography (GC) and the products formed during catalysis were analyzed by Mass Spectroscopy (MS).
The Solar disinfection system uses solar energy to disinfect food grains, by removing the moisture content present in them. This aids their preservation for a long term. A mixed mode solar dryer uses a combination of direct solar drying and hot air drying, for maximum efficiency. It is observed that, some amount of this energy is lost, through conduction in the collector body. This is avoided with the use of insulators. Different types of heat insulating materials are available. This study uses the weighted property method to decide among the various alternatives of insulating material, which is suitable for the mentioned project. Here various parameters of insulator material selection are applied and their Relative Emphasis Coefficient, Scaled Property, and Ranks (or weights) are calculated. The material with a rank of unity gets the utmost preference, and the subsequent materials are preferred in the obtained order. The tangible parameters considered in this study are: Density, Thermal conductivity, Maximum service temperature range, Specific heat capacity, and cost. In this study, Rock mineral wool, with a performance of 84.58%, was selected as the suitable material. This can be applied in the mentioned project as an insulation material, after considering other intangible factors.
In this study, an attempt has been made to join MMC (AlSiCp) at interfacial reaction during lap joint. Different specimens of Silicon (Si) particulate reinforced in aluminium matrix were prepared. The various attempts to join MMC have been made using different interfacial joining materials. The obtained strength of lap joint was minimum due to formation of oxides and needs further investigation. Aluminium forms oxide layer within 600 s of application of microwave power of 900 W, during microwave joining. The reaction between two specimens for lap joint resulted in formation of molten aluminum enclosed in aluminium oxide layer. An attempt has been made to break the oxide layer to allow the flow of molten aluminium from one specimen to other.
Superalloys are treated as the most important group among engineering materials as they play a very important role in meeting the rapid rising demand for metallic materials with higher strength and special properties, with the advancement of technology. Such materials which are used for high temperature applications are subjected to hot corrosion and high temperature wear. This leads to high grade problem which has been observed in boilers, internal combustion engines, gas turbines, fluidized bed combustion, and industrial waste incinerators. There are several methods available today to minimize the extent of hot corrosion. But more efforts need to be done for a quantitative evaluation of these methods. For the past few years, the plasma sprayed protective coatings technique is widely adopted throughout the globe and is extensively used for protecting the critical components/appliances when exposed to aggressive environmental conditions like super critical temperatures and pressures. Nowadays, coatings are applied to components in energy generation processes to provide thermal insulation, corrosion and wear resistance. In order to protect the surface of structural steels and to prevent them from surface degradation processes, such as wear, oxidation, corrosion and erosion, coatings are applied to chemical process plants or boilers. This paper is aimed at presenting the current scenario related to the use of plasma spray as a protective technique against hot corrosion. It includes a brief discussion about the fundamentals of plasma spray, process variants of plasma spraying, post coating treatments, role of coatings in aggressive environments, and other relevant researches. The use of plasma spray coating technique and surface treatments to improve the corrosion and wear resistance of engineering components is well established and is a recognized technology.
This paper presents a detailed study of Nano-cellulosic rubber composite fabrication and the results of property analysis done by several authors. The key parameters, such as surface modification of Natural Fibre (NF), size and orientation of cellulose, curing time and temperature, fabrication method, etc., that significantly influences the properties and interfacial characteristics have been studied. Surface treatment processes by NaOH, NaClO , H O , etc., followed by the 2 2 2 extraction of Nano Cellulose Crystal (CNC) or Cellulose Nano Whiskers (CNW) from fibre by strong acids are explained. However, the other method for CNC extraction is Steam Explosion. Further microstructure studies by FESEM (Field Emission Scanning Electron Microscope), SEM (5 Scanning Electron Microscope), TEM (Transmission Electron Microscopy), and XRD (X-ray Powder Diffraction), thermal characteristic by TGA (Thermogravimetric Analysis) and mechanical properties like tensile, impact strength, etc., are explained as described by several authors. The micro structure of the composite shows how fibre breaks at amorphous region, and crystalline part is increased after surface preparation; also how strength and other mechanical properties are enhanced.