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 severe plastic deformation technique that has attracted the material community in present days is Equal Channel Angular Pressing (ECAP). Ultra fine-grained microstructures can be produced by this technique without a significant change in geometry. The present work describes the study of cryo treatment effect post ECAP aging on impact strength of aluminium 6063 alloy using Charpy impact test. A channel having an angle of 108o is used for conducting ECAP process. Samples having dimensions of 100 mm X 9.5 mm X 9.5 mm were chosen and these samples solution were treated at 520 oC for 120 minutes. These samples were processed into two methods by dividing these solution treated samples into two groups. One set of samples has been dipped in liquid nitrogen for 20 minutes before the ECAP process has been carried out, obtaining Cryo-ECAP samples. The second set of solution-treated samples has been directly subjected to ECAP process, producing RT ECAP samples. The obtained samples dimensions were made suitable for Micro Vickers and Charpy Impact test and were given aging treatment at 180 oC for different timings. These two sets of samples are subjected to Micro Vickers hardness tests and Impact tests. The obtained results are correlated with macro and micro examinations.
Expressions for the rotational barrier height parameters K1 and K2 have been derived for dilute OH-impurity in KCl, KBr and KI lattices. These values are derived using an ab initio calculations using point charge point dipole model, which appears to be suited for the present systems. The obtained values are close to what is observed generally for such systems. The results explains the the energy orientational configuration direction for each system. The value of potential parameters K1 and K2 also describes the energy eigen values for the rotor
The nature and content of rock minerals have a significant impact on the behavior and properties of rocks and the entire rock massif. The rock mineral such as calcite, china clay, talc and whiting in the form of rock specimen has been collected from various part of Rajasthan. The final materials in the form of powder in micrometer size were obtained using mechanical method. In the current paper, thermal behavior using TGA of all the rock minerals were studied and discussed briefly. The thermodynamics parameters were also determined with Broido method. Parameters such as Activation Energy Enthalpy, Entropy and Gibbs energy were computed from the TGA data using Broido method. The dynamic temperature aspect has been considered eventually and the results were presented in respective section. The DSC measurements curve illustrates heat flow with rising temperature. Specific heat capacities and thermal diffusivities of rock's minerals were measured form the analytical data. The investigation peak and region corresponding to enthalpy involved in the process has been identified in schematic DSC curve. Present investigation deals with measurement of the enthalpy of fusion, enthalpy of crystallization and melting point of minerals besides some other thermal event measurement briefly discussed at room temperature to decomposition temperature. All the measurements and calculations were carried out with scientific evidences. Phase transitions, transition due to resultant energy changes as well as glass transitions has also been recognized and discussed.
In the last 10 years, perovskite solar cells (PSC) had their efficiencies increased from 3.8% to 25.5% while other photovoltaic technologies have never witnessed such dramatic increase in such short span of time. Despite interesting properties of the perovskite material, it suffers from poor moisture, UV and temperature stability. In this work, we intend to create a solar cell design by removing the hole transporting layer along with the use of bilayer electron transporting layer. The thickness of all the layers in the solar cell are optimized with GPVDM simulation software to get higher efficiency. This is done to enhance the stability while having more efficiency for a HTL free device architecture. Efficiency of nearly 15.6% has been obtained for the layer thickness optimized device.
Vibrational and damping characteristics of composites are important in many applications, including ground-based and airborne vehicles, space structures, and sporting goods. In response to a transient or dynamic loading, structures can experience excessive vibrations that create high noise levels, stress fatigue failure, premature wear, operator discomfort, and unsafe operating conditions. Most of the research work is focused mainly on the characterization of mechanical, tribological and microstructure properties. Tungsten carbide is attractive as reinforcement because it has high hardness, high modulus of elasticity and excellent thermal stability. From the literature review, it is evident that only limited studies have been carried out on the aluminium-tungsten carbide (WC) metal matrix composites. In this project, we investigated the dynamic behaviour of aluminium hybrid metal matrix composites using tungsten carbide and fly ash as reinforcements.