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
When compared with all the conventional materials, different aluminium alloys are gaining their attention in many areas of interest like aerospace, automobile, and manufacturing due to their enhanced mechanical properties. The 2xxx series of aluminium alloy is being used to a large degree due to their augmented properties like a great response to aging, excellent formability, and high strength. In this investigation, research is carried out to understand the changes in the mechanical properties and microstructure characteristics of AA2024 under the influence of various by-products of the industries, which are also known as industrial wastes in the form of reinforcements during the preparation of aluminium metal matrix composites. By this work, usage of industrial solid wastes as reinforcement would reduce the cost of the products in widespread applications. Among various industrial wastes, red mud and fly ash are chosen as reinforcement in preparation of MMC. Stir casting process is used for synthesizing MMC with 2, 4, and 6% weight fractions of nano red mud and fixed weight fraction of micro fly ash each. For the synthesized hybrid composite, experimental tests were carried out for various mechanical properties. It was found that there is a great improvement in the ultimate strengths and hardness with an increase in the weight fractions of the reinforcement, and decrease in the density of the composite with increasing weight fractions of the reinforcement. To examine the microstructure characteristics, Field Emission Scanning Electron Microscope (FESEM) is used for the prepared hybrid composite. It has been found that there has been a uniform distribution of the reinforcement around the matrix. FESEM and EDS results have revealed the presence of nano red mud and fly ash around the matrix and also revealed that absence of any voids or cracks in the prepared hybrid composite.
Two series of Mg-Mn ferrites with the substitution of Sm3+ and or Zr4+ having the chemical compositions Mg0.95 Mn0.05 Sm2x Fe2-2x O4 and Mg0.95 Mn0.05+x ZrxFe2-2x O4 have been prepared. Two types such as bulk as well as nano size particles ferrite materials are prepared for relative studies of these materials. Dielectric properties such as dielectric constant, complex dielectric constant and dielectric loss tangent along with AC resistivity are investigated in the frequency range 1 Hz to 10 MHz and temperature range -150 to 300°C. The value of x varies from 0.0 to 0.5 in steps of 0.1. The obtained experimental results of dielectric constant, loss factor, and AC resistivity of bulk size ferrites are compared relative to nano size ferrites.
In the present machining environment, application of nanofluids in metal cutting operations plays a vital role to improve machinability and efficiency of the machine tool. To reduce environmental hazards, minimal fluid application is more suitable. The preparation of suitable nanofluids is still a difficult task for metal cutting industries. The selection of nanoparticle and cutting fluids are not so easy because its properties will affect the performance of nanofluid preparation and performance. Titanium (Ti-6Al-4V) alloy is used as a work material because of its inherent properties. Uncoated carbide tool is used to cut the work material because of its less cost with good hardness capability. To find optimal machining condition and prediction, optimal output responses are very useful for the metal cutting process to enhance the machine tool performance. In the present research work, graphene nanoparticle was selected because its high thermal conductivity at elevated temperatures, and vegetable oils (soybean oils ) with high viscosity index to reduce tool wear, surface roughness, temperature, and cycle time. A nanofluid based minimal fluid application with optimization using GRA, PCA, and RSM proved its best. All three optimization process gave very close valves to each other. Since this research is a multi-objective, these developed models using Response Surface Methodology (RSM), Grey Relational Analysis (GRA), and Principal Component Analysis can be used for evaluation of surface roughness, cutting force, tool wear, temperature, and cutting time as well.
Dye Sensitized Solar Cells (DSSC) have widely been studied for its economic benefits with better efficiency, for this purpose many metallic dyes have been synthesized. This paper aims for increasing efficiency using easy and low cost technique, which includes the effect of metallic solution prepared by using two salts, i.e. cobalt nitrate and magnesium sulphate in different solvents (DMSO, ethanol, double distilled water) for mixture of two dyes (Azur B and Crystal Violet). The prepared solution of two salts was used along with Deoxycholic solution (DCA) in dye solution to increase the stability and performance of cell. It was noticed that metallic solution alone increased the efficiency of cell, but found noticeable fluctuation in current, which was eradicated by using DCA solution. Maximum conversion efficiency was found in DMSO solvent system for Azur B and Crystal Violet dye.
A study has been conducted to find out the rheological properties of h-BN nano cutting fluid and then its effects have been analyzed on the machinability of Inconel 625. It is to be noted that addition of nanoparticles with improved rheological behavior helps to enhance the anti-wear and anti-frictional properties of cutting fluid. Hexagonal boron nitride (h-BN) nanoparticles are environmentally safe, chemically inert, and lubricious in nature and hence preparation of BN nano cutting fluid is a reliable option for machining with MQL technique in machining of difficult to cut material like Inconel-625. This paper includes preparation of BN-nano cutting fluid with analysis of its rheological properties and effect on machining of Inconel 625 with h-Bn nano fluid assisted MQL.
Electron Paramagnetic Resonance (EPR) and Optical absorption studies were investigated in CuO doped (30-x)CdO- xAl2O3 - 35 Bi2O3 - 34 B2O3 -1CuO glasses (x=0, 5, 10, 15 mole %) were prepared by melt quenching technique. The amorphous nature of all the glass samples were confirmed by XRD technique. By using the EPR and Optical absorption measurements techniques the structural changes in the above glass system was estimated and it was confirmed that Cu2+ ions were present in tetragonally distorted octahedral sites elongated along z-axis with dx2-y2 orbital (2B1g) ground state in all of the glasses investigated. Bonding parameters had been evaluated by correlating EPR and optical absorption data. The molecular orbital band parameter values of (30-x)CdO- xAl2O3 - 35 Bi2O3 - 34 B2O3 -1CuO glasses values indicated in plane σ-bonding (α2) is moderately ionic. The in plane π-bonding (β2) is ionic in nature and out of plane π-bonding (β'2) is shifting from moderately ionic to ionic as we move from CABBC1 to CABBC3. The FTIR spectra revealed information about the nature of bonds present in the glass matrix.