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Yadav, Chandreshvar Prasad

Temperature Dependent Ultrasonic Characterization of Wurtzite Boron Nitride

Abstract Views :264 | PDF Views:0

Authors

Chandreshvar Prasad Yadav ¹, Dharmendra Kumar Pandey ¹

Affiliations
1 Department of Physics, P.P.N. (P.G.) College, Kanpur-208 001, IN

Source

Journal of Pure and Applied Ultrasonics, Vol 39, No 4 (2017), Pagination: 103-109

Abstract

The present study encloses the evaluation of second order elastic constants of wurtzite boron nitride (w-BN) in temperature range 300K-1800K using the many body interaction potential model approach. Orientation and temperature dependent ultrasonic velocity, thermal relaxation time and other related thermo-physical parameters (Debye average velocity, Debye temperature,specific heat, thermal energy density and thermal conductivity) are also calculated using evaluated second order elastic constants and other known parameters of w-BN. It is found that thermal relaxation time is least for the wave propagation along 55° from the unique axis of crystal at each temperature. The orientation dependent thermal relaxation time of w-BN is predominantly affected by the Debye average velocity while the temperature dependent thermal relaxation time is governed by thermal conductivity. The calculated elastic and ultrasonic properties of w-BN are compared with the properties of other wurtzite structured materials for the complete analysis and characterization of material.

Keywords

Elastic Constants, Ultrasonic Velocities, Thermal Conductivity, Thermal Relaxation Time.

Full Text

References

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Kittel C., Introduction to Solid State Physics, 7^th edition John Wiley & Sons, Inc. Singapore, New York, 17 (2003) 25, 51.

Yadav A. K., Yadav R. R., Pandey D. K. and Singh D., Ultrasonic study of fission products precipitated in the nuclear fuel, Mat. Lett., 62 (2008) 3258-3261.

Pandey D. K. and Pandey S., Ultrasonic : a technique of material characterization: in Acoustic Waves, edited by: Don W. Dissanayake, Scio Publisher, Sciyo, Croatia, (2010) 397-430.

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Pandey D. K., Singh D. and Yadav R. R., Ultrasonic wave propagation in IIIrd group nitrides, Appl. Acoust., (2007) 766-777.

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Elastic and Thermo-Acoustic Study of YM Intermetallics

Abstract Views :220 | PDF Views:1

Authors

Aftab Khan ¹, Chandreshvar Prasad Yadav ¹, Dharmendra Kumar Pandey ¹, Dhananjay Singh ², Devraj Singh ³

Affiliations
1 Department of Physics, P.P.N. (P.G.) College, Kanpur-208001, IN
2 Department of Chemistry, P.P.N. (P.G.) College, Kanpur-208001, IN
3 Amity Institute of Applied Sciences, Amity University, Noida-201313, IN

Source

Journal of Pure and Applied Ultrasonics, Vol 41, No 1 (2019), Pagination: 1-8

Abstract

The work involves estimation of elastic, ultrasonic and thermo-physical properties of YM (Y: Yttrium, M=Zn, Cu, Ag) intermetallics at 300 K. Initially, second order elastic constants and elastic modulus of chosen intermetallics are determined in temperature range 300K-1200K under potential model approach. Later, the ultrasonic velocities are calculated using second order elastic constants and densities for wave propagation along <100>, <110> and <111> crystallographic directions. Additionally, Debye temperature, specific heat at constant volume, thermal conductivity and thermal relaxation time are also calculated. The analysis reveals that compound YCu incorporates better mechanical and thermal properties than the other two compounds.

Keywords

Intermetallics, Elastic Properties, Ultrasonic Velocity, Thermal Relaxation Time, Thermal Conductivity.

Full Text

References

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Wu Y., Hu W. and Han S., First principle calculation of the elastic constants, the electronic density of the states and the ductility mechanism of the intermetallic compounds: YAg, YCu and YRh, Physica B 403 (2008) 3792-3797.

Wang R., Wang S. and Xiaozhi Wu., On third-order elastic constants for ductile rare-earth intermetallic compounds: A first-principles study, Intermetallics 18 (2010) 1653-1658.

Tao X., Chen H., Li X., Ouyang Y. and Liao S., The Mechanical, electronic structure and thermodynamic properties of B2 based AgRE studied from first principles, Phys. Scr. 83 (2011) 045301.

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Brugger K., Thermodynamics definition of Higher Order Elastic coefficients, Phys. Rev. 133(6A) (1964) A1611.

Yadav R.R. and Singh D., Ultrasonic attenuation in lanthanum monochalcogenides, J. Phys. Soc. Jpn. 70 (2001) 1825-1832.

Yadav R.R. and Pandey D.K., Size dependent acoustical properties of bcc metal, Acta Phys. Pol. A 107 (2005) 933-946.

Moakafi M., Khenata R., Bouhemadou A., Semari F., Reshak A.H. and Rabah M., Elastic, electronic and optical properties of cubic antiperovskites SbNCa3 and BiNCa3, Comput. Mat. Sci. 46 (2009) 1051-1057.

Kalarasse F., Kalarasse L., Bennecer B. and Mellouki A., Elastic and Electronic properties of Li2ZnFe, Comput. Mat. Sci. 47 (2010) 869-874.

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Pillai S. O., Solid State physics: Crystal Physics, 7^th Ed., New Age International Publisher, (2005) 100-111.

Pandey D. K. and Pandey S., in Acoustic Waves: Ultrasonic: a technique of material characterization, Eds: Don W. Dissanayake, Scio Publisher, Sciyo Croatia, (2010) 397-430.

Kittel C., Introduction to Solid State Physics,7^th edition John Wiley & Sons, Inc. Singapore New York, (2003) 24.

Gray D. E., AIP Handbook, IIIrd edition. McGraw Hill Co. Inc., New York, (1956) 4-44, 4-57.

Morelli D. T. and Slack G. A., High Lattice Thermal Conductivity Solids in: High Thermal Conductivity of Materials, Eds: by Shinde SL, Goela J. XVIII Ed. Springer, (2006) 37-68.

Pandey D. K., Singh D., Bhalla V., Tripathi S. and Yadav R. R., Temperature dependent elastic and ultrasonic properties of Yt terbium monopnictides, Indian J. Pure Appl. Phys. 52 (2014) 330-336.

Gaith M. and Alhayek I., Correlations between overall elastic stiffness, bulk modulus and interatomic distance in anisotropic materials: semiconductors, Rev. Adv. Mater. Sci. 21 (2009) 183-191.

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Bhalla V., Singh D., Jain S. K. and Kumar R., Ultrasonic attenuation in rare-earth monoarsenides, Pramana 86 (2016) 1355-1367.

Yadawa P. K., Singh D., Pandey D. K. and Yadav R. R., Elastic and acoustic properties of heavy rare-earth metals, The Open Acoustic Journal 2 (2009) 61-67.

Yadav A. K., Yadav R. R., Pandey D. K. and Singh D., Ultrasonic study of fission products precipitated in the nuclear field, Mat. Lett., 62 (2008) 3258-3261.

Pandey D. K., Singh D. and Yadav R. R., Ultrasonic wave propagation in III^rd group nitrides, Appl. Acoust. (2007) 766-777.

Singh D., Bhalla V., Bala J. and Wadhwa S., Ultrasonic investigations on polonides of Ba, Ca, and Pb, Z. Naturforsch. A 72 (2017) 977-983.

Yadav C.P., Pandey D.K. and Singh D., Ultrasonic study of Laves compounds ScOs₂ and YOs₂, Indian J. Phys. (2019). http://doi.org/10.1007/s12648-019-01389-8.

Jyoti B., Singh D., Kanshik S., Bhalla V., Wadhwa S. and Pandey D.K., Ultrasonic attenuation in yttrium monochalcogenides, J. Pure Appl. Ultrason. 40 (2018) 93-99.

Ultrasonic Characterization of Structured Materials and Smart Fluids

An ultrasonic exploration of physico-chemical properties for mixtures of dichloroacetyl chloride with polar, non-polar and polymers at 300 K

Abstract Views :78 | PDF Views:0

Authors

Mahendra Kumar ¹, Chandreshvar Prasad Yadav ¹, Dharmendra Kumar Pandey ¹, Dhananjay Singh ², Renuka Arora ¹

Affiliations
1 Department of Physics, P.P.N. (P.G.) College, Kanpur-208 001, Uttar Pradesh, India., IN
2 Department of Chemistry, P.P.N. (P.G.) College, Kanpur-208 001, Uttar Pradesh, India., IN

Source

Journal of Pure and Applied Ultrasonics, Vol 44, No 1-2 (2022), Pagination: 17-27

Abstract

The present study is oriented towards the demonstration of physico-chemical properties and molecular interactions of the prepared binary mixture of Dichloroacetyl chloride (DCAC) with methanol/ethanol/CCl ₄ / PEGs through ultrasonic non-destructive characterization. The intermolecular interaction, structural ordering, and corrosiveness aspects of prepared binary mixtures have been interpreted on the basis of measured (density, viscosity, ultrasonic velocity) and estimated thermo-physical quantities (compressibility, free length, free volume, Gibb's free energy, thermal relaxation time, and ultrasonic absorption) at 300K. All binary mixtures have been received to undergo exothermic reaction during preparation while mixture DCAC + methanol has been found to produce excessive heat and harmful odour vapour. The study confirms that DCAC+CCl ₄ consist of least intermolecular interaction while mixture DCAC with PEG600 possesses strong molecular interaction among constituents accomplished by intense hydrogen bonding and physical forces. It also concludes that DCAC + PEG600 shall be highly viscous and least corrosive in comparison to other prepared mixtures. The present study provides new dimension for applicability of hazardous chemical DCAC in mixture form toward herbicides, pesticides, and fertilizers industries.

Keywords

Binary Liquid Mixture, Intermolecular Interaction, Physico-Chemical Properties, Ultrasonic Parameters.

Full Text

References

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Temperature dependent ultrasonic characterization of AuRE intermetallics

Abstract Views :173 | PDF Views:0

Authors

Mohd Aftab Khan ¹, Chandreshvar Prasad Yadav ¹, Mahendra Kumar ¹, Dharmendra Kumar Pandey ¹, Devendra Nath Mishra ², Renuka Arora ¹

Affiliations
1 Department of Physics, P.P.N. (P.G.) College, Kanpur, Uttar Pradesh-208 001, India., IN
2 Department of Physics, United College of Engineering & Research, Naini, Prayagraj, Uttar Pradesh-211 010, India., IN

Source

Journal of Pure and Applied Ultrasonics, Vol 44, No 3-4 (2022), Pagination: 45-51

Abstract

The 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.

Keywords

Rare-Earth Intermetallics, Elastic Properties, Ultrasonic Velocity, Thermo-Physical Properties.

Full Text

References

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