Modeling Nanotube Mechanics: Shear Modulus and Buckling Loads in SWCNTs
Entropy-Guided VIKOR Technique for Optimal Selection of Aluminium Hybrid Metal Matrix Composites
An Experimental Investigation on the Influence of Sn Addition and Aging Time on the Mechanical and Micro Structural Properties of AZ80-1.2RE Magnesium Alloy
Qualitative and Quantitative Analysis of Hot Rolled Ductile Cast Iron as Composite Structure in Building Elements
A Critical Review of Advanced Techniques to Improve Machining of Titanium Alloy (Grade 5)
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
The techniques for finishing of materials are being developed for applications in the Industry. Among these applications, there are several challenging situations such as Machining of Complex Features/sections on Products and Cutting of Metallic as well as Non-Metallic Materials. It is proposed that the methods using abrasives under the application of a magnetic field is appropriate for fine finishing. The abrasives are controlled by the magnetic forces and the machining forces are transferred to the workpiece surfaces. The quality of surface finish obtained depends on the quality of abrasives and the magnetic Lorentz forces. Considering the cost optimization of finishing process using magnetic abrasives, cost of the abrasive is of primary concern. The number of abrasive particles transferred to the intended cutting zone, size variation in the abrasive particles and the velocity of impingement of abrasive particles significantly influences the material removal mechanisms. It is evident that the generation of abrasives is also a challenging task. Therefore, in this paper, a preliminary study is carried out on finishing methods by employing the abrasives, under the effect of magnetic field. The significance of magnetic field application on various aspects of material removal is correlated.
Surface Functionalization of Nanocrystalline Cellulose using Diethyl Amine was carried out to form an Anion Adsorbent (3-N-N' dimethylamino-2-hydroxypropyl Nanocrystalline Cellulose Ether) for Arsenic Remediation. The product was thoroughly characterized using modern tools. Nano-biosorbent had high efficiency of removal of trivalent (85.20 %) and pentavalent (97.60 %) arsenic from aqueous solutions, even at low concentrations. Adsorption capacity was found to be 8.28 and 9.56 mg/g for As (III) and As (V) respectively. Functionalized nano-biosorbent is ideally suited for economic biosorbent for pretreatment step before large scale chemical treatments for arsenic remediation.
This paper present synthesis of Polyaniline-Zinc Oxide Composites and their usage as Ammonia Gas Sensor. The authors adopted a novel chemical route for the synthesis of polyaniline composites via chemical method. These samples were prepared by oxidation of aniline via rapid mixing method. Aniline solution is prepared in sulphuric acid with addition of fixed wt % of zinc oxide. PANI-ZnO composites were synthesized by rapid mixing of ammonium persulphate to aniline solution in an ice bath. The synthesized samples were characterized using X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscope (FESEM) techniques. The morphology of synthesized samples exhibited fibrous and spherical structures. The thick films were prepared salt deposited on alumina substrate for gas sensing application. These sensors exhibited excellent response and recovery time, when exposed to different concentration of ammonia gas at room temperature.
Ionic conductivity of xanthan gum based gel electrolytes containing NaOH has been studied and the maximum ionic conductivity (σ = 88.8 mS/cm) at room temperature has been recorded. The behavior of ionic conductivity with the rise in temperature has been observed. A small change in ionic conductivity of xanthan gum based gel electrolytes containing sodium hydroxide (NaOH) has been observed with the passage of time. pH value of gel electrolyte containing NaOH shows their basic in nature.
Present work reports the structural and optical properties of pristine and gamma irradiated muscovite mica. The XRD spectra are used to estimate structural parameters such as crystallite size and micro strain of pristine and irradiated samples. Williamson Hall analysis is employed to calculate crystallite size and micro strain of pristine and irradiated sheets. UV-VIS analysis provides the value of optical indirect, direct band gap and Urbach energy. It was found that the value of optical indirect and direct band gap increases with the increase of gamma dose upto 100 kGy and then decreases with further increase in gamma dose upto 2000 kGy. Thus, the increase of optical band gap makes natural muscovite fits for efficient optoelectronic devices.
The facile synthesis of stable gold nano particles embeded solanum tuberosum (GNPST) is demonstrated using extract of Solanum Tuberosum. The best parameters for the synthesis were NaAuCl4 salt (0.1M, 2 μL) at room temperature. The results were verified using UV-Vis spectrometry, XRD, AFM and SEM. GNPST were monodispersed and of the size (40 ± 20nm). DPPH and Fenton bioassay indicated that GNPST exhibit 12% enhancement in antioxidant activity. HPTLC detection identified ascorbic acid as major antioxidant compound in the potato extract.
Burnishing is considered as a super finishing process. In this process, the metallic surface of the work piece undergoes plastic deformation by the pressing action of a hard and highly polished rotating ball or roller. By using finishing processes such as reaming, boring, etc., we can have the good surface finish but there is no affect on the surface characteristics of the material. Improvements in surface finish, surface hardness, wear resistance and corrosion resistance can be achieved by the application of this process. Burnishing parameters such as burnishing speed, burnishing force, burnishing feed, plays an important role in the improvement of the surface characteristics of the material. To select the burnishing parameters to reduce the surface roughness and to increase the surface hardness is especially crucial. The aim of this paper is to critically discuss the affect of different parameters on burnishing.