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 present work deals with the torsional behaviour of the glass fiber wounded aluminium shaft. This hybrid composite shaft consists of an aluminium tube wounded with three layers of glass/epoxy. In this paper, experimental as well as numerical evaluation of the maximum torsion strength capacity of the hybrid composite shafts at the different winding angles (300, 450 and 600) are presented. The torsion behaviour has been experimentally analysed for the hybrid composite shafts using an axial torsion machine at room temperature. For finite element analysis (FEA) of the hybrid composite shaft, the CATIA modelling software has been used for designing, and ANSYS software has been used to analyse the torsional behaviour of the designed hybrid composite under static torsion. Good agreements were predicted between the numerical and experimental results. Both numerical and experimental results show that the static torque capacity of the hybrid composite shaft is significantly affected by the winding angle, and the maximum static torsional capacity of the hybrid composite aluminium shaft has been found at a winding angle of 450.
Two series of Sm/Zr substituted Mg-Mn ferrite materials with bulk and nano sizes are developed whose compositions are Mg0.95Mn0.05Sm2xFe2-2xO4 and Mg0.95Mn0.05+xZrxFe2-2xO4 in which x value varies from 0.0 to 0.5. The saturation magnetization (Ms), coercivity (Hc), retentivity (Mr), remnant ratio ®, magneton number (nB) and Curie temperature values are evaluated with initial permeability. Results are explained based on the exchange interactions of magnetic ions with the existing models. Decrease of particle size has a great impact on physical parameters. Variation of saturation magnetization (Ms) and dielectric constant as a function of temperature are performed to verify the multiferroic nature of the present materials. The final results of Sm3+/Zr4+ (samarium/zirconium) substituted Mg-Mn ferrites indicated that they obey both ferroelectric and ferromagnetic nature and are considered as multiferroic materials.
The aim of this study is to design and develop a brake pad that is efficient and low cost with varied constituent composition. The materials used include graphite, fiber glass, iron filling, silica, epoxy resin, hardener and calcite. Composite mixtures were molded. Samples of the developed brake pads were examined by measuring their mechanical, physical, and tribological properties such as wear rate, impact, tensile stress, flexural strength, and specific gravity. SEM/EDX techniques were used to analyze some of the mechanical proprieties. The results from the study established that an increase in the amount of binder (epoxy resin) and a decrease in reinforcement leads to an increase in toughness and a low wear rate. Furthermore, a decrease in the quantity of reinforcing fibers gave rise to increase in flexural strength and tensile stress.
Transition and rare earth codoped ZnO semiconductors finds greater importance in advanced functional materials due to their unique and versatile properties. La and Y codoped ZnO:Ag nanograins were synthesized using solution combustion method. The synthesized ZnO:Ag nanograins were annealed for 5 hours at 1100 °C. The structural, morphological, optical and magnetic properties have been investigated. X-ray diffraction analysis showed high intense diffraction peaks patterns which represent the high crystalline quality of synthesized nanograins and the emergence of face centered cubic phase of metallic Ag at (1 0 1) preferred orientation for silver doped ZnO samples. The Scanning Electron Microscopy (SEM) visualized the surface morphology of the title nanograins. The optical properties of the synthesized nanograins are studied and the presence of atomic vibrational modes of bonded molecules has been confirmed using Fourier-transform infrared (FT-IR) spectral analysis. The vibrating sample magnetometer (VSM) studies are performed to analyse the magnetic behaviour of the nanograins. Room temperature magnetization measurements of the rare earth codoped ZnO:Ag samples featured a weak hysteresis loops in M-H curve and a well ordered paramagnetic structure for silver doped samples. The squareness ratio has been estimated from M-H loop to check the quality of the prepared ZnO samples. The study revealed that the transition and rare earth codoped ZnO nanograins are promising material suitable for opto-electronic quenching devices.
In the recent years, metal matrix composites play a vital role in the automobile and aerospace industries due to its high strength to low weight. This research is focused on evaluation of mechanical properties of hybrid metal matrix composite of Al6061-ZrO2-Al2O3 by varying weight percentage of reinforcement from 0 to 5% of zirconium oxide (ZrO2) and aluminium oxide (Al2O3), and hybrid composite were fabricated by stir casting process. The hybrid metal matrix composites were subjected to different mechanical test to determine tensile, hardness and impact tests, and the samples used were machined from the fabricated parent composite in accordance with the ASTM standard. When compared with the base hybrid composite alloy matrix, the tensile strength, hardness, and impact strength of the hybrid composite increased by 24.3 %, 25 % and 0.7 % with the reinforcement addition of ZrO2 by 3% weight and Al2O3 by 2% weight. It has been observedthat, improvement in the impact strength were low, due to highly brittle nature of reinforcement particle, and it resisted the percentage elongation of metal matrix composites (MMCs) and ensured that there is good bonding between matrix and reinforcement particle.
Zinc oxide (ZnO) nanostructures have been synthesized using zinc acetate dehydrate and deionised water as precursors by the hydrothermal method. To investigate the morphology and size of the ZnO nanostructures, different concentrations of organic ligand hydrazine hydrate were added as a passivating agent to the precursor solution. The crystal structure of the synthesized samples were analysed by X-ray diffractometer. The influence of variation of hydrazine hydrate concentration in the synthesized samples has been investigated from the field emission scanning electron microscope images. From the diffuse reflectance spectroscopy studies, the optical absorption and band gap of the samples were determined. The samples were examined for morphology and size dependent photocatalytic activity against the degradation of methylene blue organic dye under visible light irradiation.