Addressing Bioprinting Challenges in Tissue Engineering
Synthesis of Zinc Oxide Nanoflower using Egg Shell Membrane as Template
In Vitro and in Vivo Experiment of Antibacterial Silver Nanoparticle-Functionalized Bone Grafting Replacements
Biocompatibility in Orthopedic Implants: Advancements and Challenges
Contemporary Approaches towards Emerging Visual Prosthesis Technologies
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
To improve the machinability of Titanium ASTM B-348 grade-5 alloy, an attempt has been made to study the effect of machining variables on response parameters which was further validated by literature, SEM (Scanning Electron Microscopy), EDS (Energy Dispersive X-ray Spectroscopy) of tool inserts and chips collected at different conditions. The results reveal that with the increase in feed rate at constant depth of cut, both the main cutting force and the tool tip temperature increase. The dominant wear mechanisms responsible for the crater wear on rake face are adhesion, diffusion wear and chipping at nose of tool insert. Stress or specific cutting force (Kc) decreases with increase in cutting speed from 80 m/min to 140 m/min at all depths of cut with a few exceptions. The power consumption increases with increase in the cutting speed and decrease in depth of cut having maximum value at maximum feed rate, maximum cutting speed and minimum depth of cut. Average surface roughness increases with increase in feed rate and decrease in depth of cut and the peak value of average surface roughness was obtained at 100 m/min cutting speed, because of the presence of severe crater wear. The microscopic analysis of chips indicate the formation of serrated secondary tooth in addition to adiabatic shear bands at different cutting speeds which has significant effect on the main cutting force; thus increasing the tool tip temperature and enhancing the tool wear.
Ceramic whitewares practically signify vitreous or glassy elements which are usually formed from a mixture of China Clay, ball clay, quartz and feldspar milled to their possible finest particles and fired to form a ceramic compound. Ceramic whitewares are generally associated with some tremendous technical properties which make them applicable in nearly all fields of life. These admirable properties are usually a function of the China Clay present in the composition which varies respectively with their geological deposits, and furthermore affects the mechanical and physical properties of the composed whiteware. This research is therefore aimed at studying the variation of China Clay deposits and their effect in technical properties of ceramic whiteware compositions, for the production of ceramic whitewares. This was carried out by substituting China Clay of different deposits in a standard whiteware composition which was later fired at different temperatures of 1050oC, 1150oC, 1200oC and 1250oC respectively with a soaking time of 1 hour.
Nanocomposite Polymer Gels (NCPG) composed of Polymethylmethacrylate (PMMA), Lithium Perchlorate (LiClO4), Dimethylacetamide (DMA), Dimethyl carbonate (DMC) and Nano sized fumed silica (SiO2) were prepared to improve the ionic conductivity and mechanical stability of solid state electrolytes. The increase in conductivity with the polymer addition has been explained to be due to the dissociation of undissociated salt present in the electrolytes. With the addition of nano-sized fumed silica (SiO2 ) to the gels, the ionic conductivity further increased which has been explained on the basis of double percolation threshold model. The dependence of conductivity of NCPGs on temperature was also measured, and a maximum room temperature conductivity of 2.45×10-2 S cm-1 was obtained for electrolytes composed of DMA+0.5M LiClO4 + 10 wt% PMMA + 8 wt% SiO2 . The effect of dielectric constant of solvent has also been studied. The conductivity of composite gels does not show much change over 20-1000 C temperature range and also remains constant with time which is suitable for their use as electrolytes in various devices like solid state lithium ion batteries, electrochemical display devices, electrochemical sensors etc.
Spot-welded joints are widely used in industries. A simplified structural model is proposed in this paper to study the residual stresses in spot-welded joints. The current paper describes the influence of the weld parameters on the residual stresses of resistance spot welds on 304 type stainless steel sheets. Various loading conditions and joint parameters are considered. It is found that the increase of both weld current and weld time decreases the residual stresses, and the increase of electrode force decreases the residual stresses. The nugget diameter increases continuously with weld current.
The price and uncertainties in the availability of traditional fuel availability is rising continuously, hence there is renewed interest in fuels from edible and non edible oils for diesel engines. Fuels synthesized from vegetable oils, animal fats and used cooking oils are considered as renewable substitutes for fossil fuels, due to their environmental values. These fuels consist of Fatty Acid Monoalkyl Esters (FAME). Oxidation of fuels from oils gives products that degrade the quality of fuels because fatty acid derivatives are more sensitive to oxidative degradation than mineral fuels. Thus, oxidation stability is a prime factor during the storage of such fuels. The present paper is an overview of the work done by different researchers on the oxidation stability of such fuels.