https://www.i-scholar.in/index.php/Ultrasonics/issue/feedJournal of Pure and Applied Ultrasonics2023-12-01T00:00:00+00:00Prof. S K Jainykyadav6659@gmail.comOpen Journal Systems<p>Journal of Pure and Applied Ultrasonics is published by Ultrasonics Society of India, New Delhi. The journal is a quarterly in a year.</p><p>Ultrasonics Society of India, New Delhi established in 1974, is engaged in the promotion of research and diffusion of knowledge concerning the field of ultrasonics and allied areas.</p>https://www.i-scholar.in/index.php/Ultrasonics/article/view/220679Editorial2023-04-27T05:11:30+00:00S. K. JainNo Abstract.2022-12-01T00:00:00+00:00https://www.i-scholar.in/index.php/Ultrasonics/article/view/220680Temperature dependent ultrasonic characterization of AuRE intermetallics2023-04-27T05:11:41+00:00Mohd Aftab Khanaftab1516@gmail.comChandreshvar Prasad YadavMahendra KumarDharmendra Kumar PandeyDevendra Nath MishraRenuka AroraThe present work incorporates computation of elastic, ultrasonic and thermal properties of B2 structured AuRE (RE= Sm, Tb, Ho, Tm) intermetallics in temperature range 300K-900K. Initially, elastic constants are determined under potential model approach. Later on, ultrasonic velocities are obtained in the same temperature range for wave propagation along and crystallographic directions. Besides it, Debye temperatures, thermal energy density, thermal expansion coefficient and melting temperature are also determined for chosen intermetallics. The obtained results are compared and analyzed to explore the inherent properties the chosen material.2022-12-01T00:00:00+00:00https://www.i-scholar.in/index.php/Ultrasonics/article/view/220681Acoustical and excess thermodynamic studies of binary liquid mixtures at varying temperature using ultrasonic technique2023-04-27T05:11:41+00:00C. Duraivathicduraivathikamali@gmail.comJeya PriyaJ. PoongodiH. Johnson JeyakumarThe ultrasonic velocity, density and viscosity of binary liquid mixtures of lactic acid with methanol, 1-propanol and 2- propanol of various compositions at 308 K, 313 K, 318 K and 323 K were determined. These experimental data have been used to estimate the thermodynamic parameters such as adiabatic compressibility (β),free length (L <sub>f</sub> ), free volume (V <sub>f</sub> ), internal pressure (π <sub>i</sub> )and enthalpy (H). The excess values of the above parameters like excess adiabatic compressibility, excess free length, excess free volume, excess internal pressure and excess enthalpy are also evaluated in order to dispute the nature of molecular interactions present among the constituent molecules of binary liquid mixture systems.2022-12-01T00:00:00+00:00https://www.i-scholar.in/index.php/Ultrasonics/article/view/220682Ultrasonic study of calcium soaps (<i>laurate and myristate</i>)2023-04-27T05:11:41+00:00Mahesh Singh KhirwarAshish K. SinghSandeep K. SinghM.K. RawatGyan Prakashgyanprakashvssd@gmail.comUltrasonic studies on calcium soaps (laurate and myristate) were performed to determine the critical micelle concentration (CMC), soap-solvent interaction, and various acoustic parameters. The values of the CMC decrease with the increase in the chain length of the soap molecules. The ultrasonic velocity, specific acoustic impedance, apparent molar compressibility, and relative association increase while the adiabatic compressibility, intermolecular free length, and solvation number, decrease with increasing soap concentration. The ultrasonic velocity results show that calcium soaps behave like a simple electrolyte in the solutions and that there is significant interaction between the soap and solvent molecules in dilute solutions.2022-12-01T00:00:00+00:00https://www.i-scholar.in/index.php/Ultrasonics/article/view/220683Estimation of effective Debye temperature of polymeric solutions at 303.15 K based on quasi-crystalline model2023-04-27T05:11:41+00:00Monika DhimanArun Upmanyuarun.upmanyu@chitkara.edu.inPankaj KumarD.P. SinghHarsh KumarBased on the quasi-crystalline model of liquids, effective Debye temperature (θ <sub>D</sub> )of six binary polymeric solutions has been computed at 303.15 K using ultrasound velocity and density data. The binary systems studied herein are polypropylene glycol (PPG) 400 + ethanol, PPG-400 + 1-propanol, and PPG-400 + 1-butanol, polyethylene glycol (PEG) 200 + methyl acrylate, PEG 200 + ethyl acrylate, and PEG-200 + n-butyl acrylate. To understand the anharmonic and quasi crystalline behaviour of these systems, several other parameters such as excess Debye temperature, diffusion constant, latent heat of melting, Debye frequency, pseudo-Grüneisen parameter (Γ), Bayer's parameter (B/A) and Lennard-Jones potential repulsive term exponent have also been determined. Excess Debye temperature values are fitted with the Redlich-Kister polynomial equation. From the knowledge of R-K coefficients, the physico-chemical characteristics of the binary mixtures are analyzed and discussed in terms of molecular interactions leading to the existence of quasi-crystalline structures in the systems under study. The effect of the variation of the alkyl chain of alkanols on the properties of PPG-400 + n-alkanol binary systems has been investigated. In addition, the effect of alkyl chain variation of acrylates on the properties of PEG-200 + alkyl acrylate binary systems has also been studied. The analysis of the obtained results points out that the effective Debye temperature and other related parameters can be successfully estimated for these binary polymeric solutions using quasi-crystalline model. The present investigation provides significant information about the existence of quasi crystalline structures and the related structural changes occurring in these polymer solutions with variation of the type and concentration of a solute.2022-12-01T00:00:00+00:00https://www.i-scholar.in/index.php/Ultrasonics/article/view/220684Effect of sonication on enhancement of mechanical properties of epoxy blended rattan fibre2023-04-27T05:11:41+00:00Susanta BeheraG. Nathganeswar.nath@gmail.comJ.R. MohantyUltrasound sonication is one of the promising techniques to disperse the fiber particles into polymeric matrix thoroughly. The present study encompasseseffect of ultrasonic treatment on mechanical property of rattan/ epoxy composite (REC). Rattan fibers were initially treated with NaOH using ultrasonic bath sonicator for proper absorption of chemical into the fibre surface. Treated rattan fibers were blended with epoxy matrix material by ultrasound during the winding process to enhance the adhesion. The ultrasonic cavitation, improves the wetting between aramid fibers and resins. According to the ultrasonic treatment the interfacial properties of the composite has been greatly improved. Various mechanical properties such as tensile strength, Young's modulus, flexural strength, flexural modulus, impact strengths and hardness of the fabricated composite have been calculated and analyzed with different weight percentage of fiber matrix composition. Scanning electron microscopy (SEM) has been used for the characterization of fabricated composite. The NaOH treated composite shows better tensile, flexural and impact strength at 45.5 MPa, 121.89 MPa and 39.445 J/m–1 respectively. The mechanical properties of the treated REC were better than the untreated REC. This shows that composite with ultrasonic treatment has good mechanical properties and can be used for wide range of engineering applications.2022-12-01T00:00:00+00:00https://www.i-scholar.in/index.php/Ultrasonics/article/view/220686Investigation of temperature dependent mechanical, thermophysical and ultrasonic properties of ScZrHf ternary alloy2023-04-27T05:11:41+00:00Shakti YadavRamanshu P. SinghDevraj SinghGiridhar Mishragiridharmishra@rediffmail.comIn this paper, we present theoretically evaluated values of temperature mechanical, thermophysical and ultrasonic properties of hexagonal close-packed structured medium entropy alloy ScZrHf in temperature range of 0-900 K. By utilizing the Lennard-Jones potential model, we have computed the second order and third order elastic constants (SOECs and TOECs) with the help of lattice parameters. While all of the SOECs have been found to be decreasing with increase in temperature, the TOECs increases with temperature. SOECs and TOECs have been used to compute the elastic moduli such as: bulk modulus, shear modulus, Young's modulus and Poisson's ratio, and ultrasonic velocities at different angle along unique axis. Further, the thermal properties such as Debye temperature, Debye heat capacity, energy density of ScZrHf in temperature range of 0-900 K and lattice thermal conductivity of ScZrHf in temperature range of 300-900K have been estimated. The lattice thermal conductivity decreases with increase in temperature. Finally, the ultrasonic attenuation due to phonon - phonon interaction in both longitudinal and shear modes and themoelastic relaxation mechanism have been computed for ScZrHf ternary alloy in the temperature range of 300-900 K and it has been found that the attenuation due to phonon-phonon interaction is much higher than that due to thermoelastic relaxation mechanism.2022-12-01T00:00:00+00:00https://www.i-scholar.in/index.php/Ultrasonics/article/view/220687Study of intermolecular interaction in binary liquid mixtures through ultrasonic speed measurement at 303.15K2023-04-27T05:11:41+00:00Seema AgarwalNo Abstract.2022-12-01T00:00:00+00:00