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Current Status and Way Forward of Microwave Hybrid Heating in India: A Bibliometric Analysis
Get PDFAutomotive and aerospace industries are keen to employ unique techniques and novel materials to reduce weight and cost and improve part performance. The application of microwave technology in the processing of metallic materials is a relative breakthrough in this direction. Recently, microwave hybrid heating (MHH) has evolved to extend the technique's utility further. Several studies on MHH have been carried out worldwide in the last three decades, and India is the prime contributor. This article documents a systematic and bibliographic review of MHH (between 1998-2022) in the Indian scenario. For this purpose, 125 documents are chosen from Scopus Core Collection and analyzed using a bibliometric analysis tool. The research status is examined based on the time distribution of articles, geography, top-cited documents, citation mapping of journals and researchers, mapping of co-occurrence, analysis of authors' keywords, country-wise publications, and cluster assessment. The result establishes that India is dominating, followed by theUSA. Moreover, there is an increasing trend in the number of publications. A guideline is also included to revive the research community's interest to mature the process further
Friction Stir Process: A Comprehensive Review on Material and Methodology
Get PDFIn recent year, advancement of the materials and processing of the material identified as research zone to make an impact in aerospace, automobile, marine and bio-medical implants application. Improvement of the material structure and surface associated with high energy requirements as well as may contain environments harmful content, like physical and chemical vapor deposition consumes high energy and extract toxic elements. Friction stir process (FSP) is surface modification and surface composites fabrication process, which works as a solid-state process. This process based on friction between the tool and workpiece which generates heat used for modification of the material. There is no fumes generation and low energy requirement, so it comes under the domain of green technology. Customized vertical milling machine is used to perform friction stir process/welding. In this review paper, an attempt has been made to study the FSP process at a glance with brief bibliometric analysis of relevant research in last two decades. Influence of the key process parameters i.e., rotational speed, traverse speed, tool geometry and machining parameters on the microstructure and mechanical properties have also been discussed. A case study on the process parameter optimization range has been done to ensure the range of parameters. This study helps to reduce the defects during the process and improve the associated properties of the processed material. Potential difficulties and the possible measures have also been suggested for giving the future direction
Beneficiation of Clays from Ramgarh-Naudiha Region of Sonbhadra District Uttar Pradesh, Impart Improved Properties for Ceramic Industries
Get PDFChemical and physical properties of clay samples collected from the deposits in the Ramgarh-Naudiha of Sonbhadra district, Uttar Pradesh were examined for their utilisation in ceramic industry. The raw clays from the deposits were found to be siliceous ball clays, contained less kaolinite, non-plastic and were unsuitable for making ceramic items. These clays have been subjected to standard beneficiation techniques which removed the free quartz. The beneficiated clays were less siliceous, had improved properties that can be used as partial replacement material in making ceramic items
Comparative experimental investigations on novel joining technology based on microwave energy to produce SS2205-SS2205 joints
Get PDFIn this work, a novel joining technology has been developed by significantly modifying the existing older joining technology. Both methods have been based on using microwave energy. Metallic joints of SS2205-SS2205 have been developed by using the novel as well as old technology. In previous technology, formation of joints has been largely affected by the use of charcoal powder (susceptor), graphite sheet (separator) and filler powder (interface) for producing the joints. On the other hand, in the newly proposed method, the joints have been fabricated without using any charcoal powder, graphite sheet or filler powder. Graphite rods have been used instead of charcoal powder thereby improving speed and cleanliness of the process. Further, absence of charcoal powder has helped in getting rid of the charcoal feeder as well as the separator sheet; thereby ensuring an easier assembly set-up and reduced set-up time. Finally, filler powder has not been used in proposed method, thereby drastically reducing the material cost. Joints’ microstructure and mechanical properties have been characterized. Newly proposed method-based joints have been observed to possess better hardness, tensile strength and ductility due to better microstructural composition despite lower carbon content. Hardness, tensile strength and percentage elongation have also been observed to be better than previous results by 8%, 16.67% and 17.85%, respectively
A novel approach to determine anti-proliferative, anti-migratory and anti-microbial properties of 2-phenylethylammonium carboxylate molecular salts
Get PDF2-Phenylethylammonium (PEA) salt derivatives have been prepared between 2-phenylethylamine with various aromatic carboxylic acids (nicotinic, benzoic, salicylic, and γ-resorcylic) and confirmed by spectroscopic analyses. Additionally, the possible biological activities of these salts have been examined and the antiproliferative and antimigrative effects of salts on breast and colon cancer cell lines have been determined. Furthermore, to obtain preliminary data for the effects of the indicated compounds on cancer angiogenesis, in vitro migration analysis has been performed by human vascular endothelial cells. The antibacterial effects of the compounds have also been investigated. Therefore, an important contribution has been made to studies conducted to better recognize the pharmacological effects of salts
Antioxidant properties of capsaicin analogues: a DFT study.
Get PDFCapsaicin is the one of the primary components of fruits of gender Capsicum and is responsible of the pungent sensation known “spiciness”. In the recent years this compound has attracted special attention thanks to their beneficial biological effects, such as their antioxidant, antiobesity and antidiabetic activity, among others. In the present studio. In the present studio, thirteen capsaicin analogues with functional groups -SH, -NH2, -OCH3 and -F in the aromatic ring, have been proposed and studies trough DFT methodologies. The reactivity indexes and primary antioxidant activity were obtained. According to the obtained results, most of the analogues with the amine group (-NH2) shown better ability to donate and accept electrons, which translates into a better antioxidant activit
Synthesis, spectral, antibacterial and docking analyses of (3,4-bis((E)-(arylidene)amino)phenyl)(phenyl)methanones
Get PDFBiologically active Schiff bases namely (3,4-bis((E)-(arylidene)amino) phenyl)(phenyl)methanones have been synthesized through ultrasonicated condensation of (3,4-diaminophenyl)(phenyl)methanone and various benzaldehydes in ethanol medium. Synthesised Schiff bases have been examined by different techniques like molecular formula calculation, molecular weight determination, melting point determination, micro analysis and spectroscopic data. The in vitro antibacterial actions of these E-imines have been assessed against bacterial strains by zone inhibition and serial dilution methods. Further, molecular docking analysis of all E-imines have been accomplished to comprehend the order of binding of Schiff bases with protein
Study of Dielectric Relaxation and Hydrogen Bonding Interaction of 1, 4-Butanediol-1, 4-Dioxane Mixture using TDR Technique
Get PDFThe complex permittivity spectra of 1, 4-butanediol -1, 4-dioxane binary mixtures have been measured in the frequency range from 10MHz to 30GHz using the time domain reflectometry (TDR) technique. The complex permittivity spectra show the Cole-Davidson type relaxation. The static dielectric constant and relaxation time at various temperatures have been obtained from complex permittivity spectra by using the nonlinear least squares fit method. The orientation of electric dipoles and solute-solvent interaction in the liquid mixture was confirmed from the excess, Bruggeman, Kirkwood correlation factor and thermodynamic parameters.
Structural and Spectroscopic Properties of Eu3+ions in Alumino-Silicate Glass
Get PDFThe structural, and optical properties of the Eu3+ ion in alumino-silicate 35Al(NO3)3: (65-x) SiO2 glass (x = 0.75, 2.0, and 4.0 mol%) were investigated. X-ray diffraction proved that the present glasses are amorphous. FTIR spectral analysis was used to determine which functional groups were present at specific annealing temperatures. The PL spectra with different Eu3+ concentrations are recorded with excitation wavelength 370 nm have been recorded at room temperature (RT). The PL spectra showed the (5D0→7FJ; J = 0...., 4) transitions of Eu3+ in the prepared glasses. The rise in Eu3+ ions in the host matrix was the explanation for the concentration quenching behaviour that was also seen. To ensure the dominant emission of the present glasses, the PL spectra were characterized using the CIE 1931 chromaticity diagram, and the results were discussed and reported in detail
