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Co-Authors
- Chinmayee Tripathy
- Rita Paikaray
- Vyoma Bhalla
- S. K. Jain
- Giridhar Mishra
- Meher Wan
- Vimal Pandey
- A. K. Tiwari
- R. R. Yadav
- Bharat Mishra
- Amit Kumar
- Ram Krishna Thakur
- Raj Kumar
- Shivani Kaushik
- R. K. Thakur
- Bhawan Jyoti
- Shikha Wadhwa
- D. K. Pandey
- Aftab Khan
- Chandreshvar Prasad Yadav
- Dharmendra Kumar Pandey
- Dhananjay Singh
- Charu Kandpal
- Arvind Kumar Singh
- Ranjan Dey
- Vinod Kumar Singh
- Sudhanshu Tripathi
- Rekha Agarwal
- Jyoti Bala
- Arvind Kumar Tiwari
- Ashish Mathur
- C. P. Yadav
- P. K. Dhawan
- Shakti Yadav
- Ramanshu P. Singh
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Singh, Devraj
- Elastic and Ultrasonic Properties of LaPn (Pn=N, P, As, Sb, Bi)
Abstract Views :187 |
PDF Views:8
Authors
Affiliations
1 Department of Physics, Ravenshaw University, Cuttack-753003, IN
2 Department of Applied Physics, Amity School of Engineering and Technology, Bijwasan, New Delhi-110061, IN
1 Department of Physics, Ravenshaw University, Cuttack-753003, IN
2 Department of Applied Physics, Amity School of Engineering and Technology, Bijwasan, New Delhi-110061, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 38, No 4 (2016), Pagination: 99-102Abstract
Elastic and ultrasonic properties of lanthanum pnictides (LaPn) have been investigated along <100>, <110>, <111> directions in the temperature range 100K to 300K. The second and third order elastic constants (SOECs and TOECs) have been computed using Coulomb and Born-Mayer potential using nearest neighbour distance and hardness parameter. Other parameters like Young's modulus, bulk modulus, shear modulus, Zener anisotropic factor, Poisson's ratio, toughness to fracture (G/B) ratio have also been found out for the future performance of LaPn. Additionally ultrasonic velocity has been evaluated with use of SOECs and TOECs. Obtained results are discussed in correlation with available mechanical and thermophysical properties of these materials.Keywords
Lanthanum Monopnictides, Elastic Properties, Ultrasonic Properties.Full Text
- Ultrasonic Attenuation in Terbium Monophosphide
Abstract Views :174 |
PDF Views:3
Authors
Affiliations
1 Amity Institute of Applied Sciences, Amity University, Noida-201303, IN
2 Department of Applied Physics, Amity School of Engineering and Technology, Bijwasan, New Delhi-110061, IN
3 Department of Applied Sciences, The NorthCap University, Sector 23A, Gurgaon-122017, IN
1 Amity Institute of Applied Sciences, Amity University, Noida-201303, IN
2 Department of Applied Physics, Amity School of Engineering and Technology, Bijwasan, New Delhi-110061, IN
3 Department of Applied Sciences, The NorthCap University, Sector 23A, Gurgaon-122017, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 38, No 3 (2016), Pagination: 84-87Abstract
The ultrasonic properties of terbium monophosphide have been investigated with its mechanical properties along <100>, <110> and <111> orientations. The second and third order elastic constants have also been calculated at 0K - 300K temperatures range using Coulomb and Born-Mayer potential. For finding the stability and ionic nature of TbP, some of the mechanical parameters have also been evaluated at room temperature. Additionally, thermal conductivity is also calculated using Slack's approach. Finally, ultrasonic attenuation in TbP is calculated. Obtained results of the present investigation are discussed in correlation with available results of previous findings.Keywords
Terbium Monophosphide, Elastic Properties, Thermal Conductivity, Ultrasonic Properties.Full Text
- Mechanical and Thermophysical Properties of Europium Monochalcogenides
Abstract Views :186 |
PDF Views:7
Authors
Affiliations
1 Department of Applied Physics, Amity School of Engineering and Technology, Bijwasan, New Delhi-110061, IN
2 Advanced Technology Development Center, Indian Institute of Technology, Kharagpur-721302, IN
1 Department of Applied Physics, Amity School of Engineering and Technology, Bijwasan, New Delhi-110061, IN
2 Advanced Technology Development Center, Indian Institute of Technology, Kharagpur-721302, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 38, No 1 (2016), Pagination: 23-27Abstract
The ultrasonic properties of europium chalcogenides EuX (X = O, S and Te) have been computed at room temperature along <100>, <110> and <111> orientations. The higher order elastic constants have also been computed using Coulomb and Born-Mayer potential upto second nearest neighbour and these are applied to compute ultrasonic properties. The mechanical and thermal properties like Youngs modulus, bulk modulus, Cauchy's relation, Zener anisotropy factor, fracture to toughness ratio, Debye temperature have also been calculated for finding the future performance of these materials. Since these materials follow the Born stability criteria, so these are mechanically stable. The fracture to toughness ratio is less than 1.75, hence these are brittle in nature. The results of present investigation have been analysed in correlation with mechanical and thermophysical properties of the similar materials.Keywords
Monochalcogenides, Elastic Properties, Thermal Properties, Ultrasonic Properties.Full Text
- Characterization of Cu-PVA Nanofluids:Ultrasonic and Thermal Properties
Abstract Views :156 |
PDF Views:9
Authors
Vimal Pandey
1,
Giridhar Mishra
2,
Meher Wan
3,
Devraj Singh
2,
A. K. Tiwari
4,
R. R. Yadav
3,
Bharat Mishra
5
Affiliations
1 Mahatma Gandhi Chitrakoot Gramodaya Vishwavidyalaya, Satna-485334, IN
2 Amity School of Engineering and Technology (Affiliated to GGSIP University), Bijwasan, New Delhi-110061, IN
3 University of Allahabad, Allahabad-211002, IN
4 B.S.N.V.P.G. College (University of Lucknow) Charbagh, Lucknow-226001, IN
5 Mahatma Gandhi Chitrakoot Gramoday Vishwavidyalaya, Satna-485334, IN
1 Mahatma Gandhi Chitrakoot Gramodaya Vishwavidyalaya, Satna-485334, IN
2 Amity School of Engineering and Technology (Affiliated to GGSIP University), Bijwasan, New Delhi-110061, IN
3 University of Allahabad, Allahabad-211002, IN
4 B.S.N.V.P.G. College (University of Lucknow) Charbagh, Lucknow-226001, IN
5 Mahatma Gandhi Chitrakoot Gramoday Vishwavidyalaya, Satna-485334, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 37, No 2-3 (2015), Pagination: 33-38Abstract
Nanofluids have unique features different from conventional solid-liquid mixtures which have millimeter or micrometer sized particles dispersed in some base fluid. Due to their excellent characteristics, these new types of fluids have attracted wide interest in recent years. It is found that nanofluids have significantly higher thermal conductivity than the base fluids. In this work we focus on the ultrasonic and thermal properties of nanofluids. Nanofluids containing copper nanoparticles with base fluid polyvinyl alcohol (PVA) have been developed in our laboratory. These nanofluids are characterized by UV-Visible spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). Temperature dependent ultrasonic velocity and ultrasonic attenuation measurements are performed for different concentration of the copper nanoparticles in the PVA. Hot Disk Thermal Constant Analyser is used for the measurement of the thermal conductivity of synthesized nanofluids. Experimental results show that the thermal conductivities of the nanofluids are higher than that of base fluid PVA. The obtained results were analyzed taking into account the ultrasonic and thermal behavior of matrix and particles. Possible mechanism for the enhancement of thermal conductivity of the nanofluids using theoretical model is also discussed.Keywords
Nanofluids, Ultrasonic Properties, Enhanced Heat Transfer, Effective Thermal Conductivity, Brownian Motion.Full Text
- Mechanical and Thermophysical Properties of Lutetium Monochalcogenides:An Ultrasonic Study
Abstract Views :235 |
PDF Views:8
Authors
Affiliations
1 Amity School of Applied Sciences, Amity University Haryana, Manesar-122413, IN
2 Department of Applied Physics, Amity School of Engineering & Technology, Bijwasan, New Delhi-110061, IN
3 Department of Physics, Gurgaon Institute of Technology & Management, Gurgaon-122413, IN
1 Amity School of Applied Sciences, Amity University Haryana, Manesar-122413, IN
2 Department of Applied Physics, Amity School of Engineering & Technology, Bijwasan, New Delhi-110061, IN
3 Department of Physics, Gurgaon Institute of Technology & Management, Gurgaon-122413, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 39, No 2 (2017), Pagination: 43-48Abstract
The paper presents theoretical temperature dependent mechanical and thermophysical properties of lutetium monochalcogenides using ultrasonic analysis. The higher order elastic constants are evaluated using Coulomb and Born-Mayer potential upto second nearest neighbour. The second order elastic constants are used to compute mechanical parameters such as bulk modulus, shear modulus, tetragonal modulus, Poisson's ratio, Zener anisotropy factor and fracture to toughness ratio for finding future performance of the chosen materials at room temperature. The second order elastic constants are further applied to find out the ultrasonic velocities <100>, <110> and <111> crystallographic directions in the temperature range 100-300 K. Finally Debye temperature, ultrasonic Gruneisen parameters and first order pressure derivatives of lutetium monochalcogenides are computed using the second and third order elastic constants. The obtained results are discussed in correlation with available results on these properties for the chosen materials.Keywords
Lutetium Monochalcogenides, Elastic Properties, Ultrasonic Properties.Full Text
References
- Nampoothiri J., Sri Harini R., Nayak S.K., Raj B. and Ravi K.R., Post in-situ reaction ultrasonic treatment for generation of Ale4.4Cu/TiB2 nanocomposite: A route to enhance the strength of metal matrix nanocomposites, J. Alloys Compd., 683 (2016) 370-378.
- Wan M., Yadav R.R., Singh D., Panday M.S. and Rajendran V., Temperature dependent ultrasonic and thermo-physical properties of polyaniline nanofibers reinforced epoxy composites, Composites Part B 87 (2016) 40-46.
- Vaitheeswaran G., Petit L., Svane A., Kanchana V. and Rajagopalan M., Electronic structure of praseodymium monopnictides and monochalcogenides under pressure, J. Phys.: Condens. Matter, 16 (2004) 4429-4440.
- Coban C., Colakoglu K. and Ciftci Y.O., First principles predictions on mechanical and physical properties of HoX (X = As, P), Mat. Chem. Phys., 125 (2011) 887-894.
- Seddik T., Semari F., Khenata R., Bouhemadou A. and Amrani B., High pressure phase transition and elastic properties of lutetium chalcogenide, Physica B 405 (2010) 394-399.
- Mir S.H., Jha P.C., Islam M.S., Banarjee A., Luo W., Dabhi S.D., Jha P.K. and Ahuja R., Static and dynamical properties of heavy actinide monopnictides of lutetium, Sci. Rep. 6 (2016) 29309.
- Larson P., Lambrecht W.R.L., Chantis A. and Van Schilfgaarde M., Electronic structure of rare-earth nitrides using the LSDA+U approach: importance of allowing 4f orbitals to break the cubic crystal symmetry, Phys. Rev. B 75 (2007) 045114.
- Shirotani I., Yamanashi K., Hayashi J., Tanaka Y., Ishimatsu N., Shimomura O. and Kikegawa T., Phase transitions of LnAs (Ln = Pr, Nd, Sm, Gd, Dy and Ho) with NaCl-type structure at high pressures, J. Phys.: Condens. Matter 13 (2001) 1939.
- Born M. and Mayer J.E., Zür Gittertheorie der Ionenkristalle, Z. Phys. 75 (1931) 1-18.
- Brugger K., Thermodynamic definition of higher order elastic coefficients. Phys. Rev. 133 (1964) A1611-A1612.
- Liebfried G. and Haln H., Zur temperaturabhangigkeit der elastischen konstantaaen von alkali halogenidid kristallen, Z. Phys. 150 (1958) 497-525.
- Bhalla V., Singh D. and Jain S.K., Mechanical and thermophysical properties of cerium monopnictides, Int. J. Thermophys. 37 (2016) 33.
- Mason W.P. Physical Acoustics. Academic Press, New York, IIIB (1965).
- Brugger K., Generalized Grüneisen parameters in anisotropic Debye model, Phys. Rev., 137 (1965) A1826-A1827.
- Lubarda V.A., Apparent elastic constants of cubic crystals and their pressure derivatives, Int. J. Non-Linear Mech. 34 (1999) 5-11.
- Yadav R.R. and Singh D., Ultrasonic attenuation in lanthanum monochalcogenides, J. Phys. Soc. Jpn., 70 (2001) 1825-1832
- Bhalla V., Kumar R., Tripathy C. and Singh D., Mechanical and thermal properties of praseodymium monopnictides: an ultrasonic study, Int. J. Mod. Phys. B 27, 1350116
- Verlinden A., Suzuki T., Delaey L. and Guenin G., Third order elastic constant of B-Cu-Zn-Al as a function of the temperature, Script. Met. 18 (1984) 975.
- Nagasawa A., Makita T. and Takagi Y., Anharmonicity and martensitic phase transition in β-phase alloys, J. Phys. Soc. Jpn. 51(1982) 3876.
- Kumar J., Kailash, Kumar V. and Chaudhary A.K., Temperature dependence of pressure derivatives of higher order elastic constants of TeO crystal, Asian J. Chem. 23 (2011) 5601-5604.
- Temperature Dependent Elastic and Ultrasonic Properties of Silver Halide Crystals
Abstract Views :178 |
PDF Views:0
Authors
Affiliations
1 Department of Physics, Nims University, Jaipur-303121, IN
2 Department of Applied Physics, Amity School of Engineering and Technology, New Delhi-110061, IN
1 Department of Physics, Nims University, Jaipur-303121, IN
2 Department of Applied Physics, Amity School of Engineering and Technology, New Delhi-110061, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 36, No 4 (2014), Pagination: 85-90Abstract
The present study deals with the computation of higher order elastic constants and ultrasonic properties of AgCl and AgBr in temperature range 0-300K. The elastic constants are estimated using Coulomb and Born-Mayer potential with two basic parameters i.e., nearest neighbour distance and hardness parameter. The ultrasonic velocity for longitudinal and shear waves along <100>, <110> and <111> orientations for temperature range 100-300K have been evaluated with second order elastic constant and density of the silver halides. The Debye average velocity, Debye temperature, bulk modulus, Breazeale's non-linearity parameter, Young's modulus and Poisson's ratio are also computed. The fracture/toughness (B/G) ratio is less than 1.75 which shows that the compounds are brittle in nature at room temperature. The materials fulfil the Born criterion of stability. AgCl is stiffer in comparison to AgBr as it has higher values of elastic constants and ultrasonic velocity.Keywords
Silver Halides, Elastic Properties, Ultrasonic Properties.Full Text
- Conference Report on National Seminar on Materials Characterization by Ultrasonics (NSMCU-2012)
Abstract Views :157 |
PDF Views:0
Authors
Affiliations
1 Department of Applied Sciences, Amity School of Engineering and Technology, Bijwasan, New Delhi, IN
1 Department of Applied Sciences, Amity School of Engineering and Technology, Bijwasan, New Delhi, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 34, No 2-3 (2012), Pagination: 64-65Abstract
Amity School of Engineering and Technology, Bijwasan, New Delhi organized a two day National Seminar on Materials Characterization by Ultrasonics (NSMCU-2012) during April 3-4, 2012; which was inaugurated by Dr. V.R. Singh, Vice-President, Ultrasonics Society of India. The eminent dignitaries present in the inaguration included. Prof. B.P. Singh, Senior Director, Amity School of Engineering and Technology, Bijwasan; Dr. V. K. Jain, Former Director Level Scientist, SSPL (DRDO) and Director, Amity Institute of Advanced Research and Studies, Amity University Uttar-Pradesh; Prof. Raja Ram Yadav, Department of Physics, University of Allahabad and Prof. (Dr.) Rekha Agarwal, Director, Amity School of Engineering and Technology, Bijwasan. The seminar was conducted in association with the Ultrasonics Society of India. The objective of the seminar was to provide a strong platform to bring scientists, engineers, technocrats, medical practitioners, researchers, industries, etc. for mutual exchange of views, knowledge and planning for the future development on various topics of ultrasonics, which are very useful in overall and healthy growth of society. The topics covered in this seminar were: ultrasonic instrumentation, sensors and transducers, biomedical ultrasonics, physical acoustics, signal processing, underwater ultrasonics, ultrasonic standards and calibrations, ultrasound in nanoscience and technology, laser ultrasonics and many more related to the subject.Full Text
- The Thermal Conductivity and Ultrasonic Absorption in Dielectric Crystals
Abstract Views :181 |
PDF Views:0
Authors
Devraj Singh
1,
R. R. Yadav
1
Affiliations
1 Department of Physics, University of Allahabad, Allahabad-211002, IN
1 Department of Physics, University of Allahabad, Allahabad-211002, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 25, No 3 (2003), Pagination: 82-87Abstract
In this paper ultrasonic absorption and other associated parameters have been evaluated in AgCl, LiF and MnO along different directions as a function of higher temperatures. We have also calculated the second and third order elastic constants of these materials for the evaluations. The results are compared with experimental values. It is concluded that the lattice thermal conductivity played an important role in temperature dependence of the ultrasonic absorption in these dielectrics.Full Text
- Ultrasonic Attenuation in Thorium Monopnictides
Abstract Views :184 |
PDF Views:0
Authors
Affiliations
1 Amity School of Applied Sciences, Amity University Haryana, Manesar-122413, IN
2 Amity Institute of Applied Sciences, Amity University, Sector-125, Noida-201313, IN
1 Amity School of Applied Sciences, Amity University Haryana, Manesar-122413, IN
2 Amity Institute of Applied Sciences, Amity University, Sector-125, Noida-201313, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 40, No 3 (2018), Pagination: 84-87Abstract
The ultrasonic attenuation due to phonon-phonon interaction have been computed along <100>, <110> and <111> directions at room temperature. For the evaluation of attenuation, we have also evaluated higher order elastic constant, ultrasonic velocity and acoustic coupling constant. The Coulomb and Born-Mayer potential has been applied to find out the higher order elastic constants in the temperature range 0-300K. Some mechanical constant were also computed for predicting for futuristic performance of the chosen materials. The behaviour of ultrasonic attenuation has been considered in correlated with other thermo-physical properties of thorium monopnictides.Keywords
Thorium Monopnictides, Elastic Properties, Ultrasonic Properties.Full Text
References
- Kholia K. and Gupta B.R.K., Structural phase transition and elastic properties of thorium pnictides at high pressure, Pramana, 68 (2007) 649-654.
- Kumar S. and Auluck S., Electronic structure and optical properties of thorium monopnictides, Bull. Mat. Sc., 26 (2003) 165-168.
- Kanchana V., Vaitheeswaran G., Svane A., Heathman S., Gerwarde L. and Olsen J.S., High-pressure study of binary thorium compounds from first principles theory and comparisons with experiment, Acta Cryst. B70 (2014) 459-468.
- Amari S., Méçabih S., Abbar B. and Bouhafs B., Firstprinciple study of structural, elastic and electronic properties of thorium monopnictides, J. Nucl. Mat. 454 (2014) 186-191.
- Dwiwedi B.P., Mishra K.K. and Upadhyaya K.S., Crystal dynamic and structural study of thorium selenide (ThSe): elastic behaviour and pressure effect, Int. J. Rec. Sc. R., 3 (2012) 611-620.
- Kapoor S., Yaduvanshi N. and Singh S., Study of phase transformation and elastic properties of ThX (X = N, P, As and Sb) under high-pressure; Mol. Phys.. 114 (2016) 3589-3597.
- Aynyas M., Sanyal S.P. and Jha P.K., Structural phase transition and elastic properties of thorium pnictides at high pressure, Physica Stat. Solidi (b) 229 (2002) 1459-1466.
- Gupta D.C. and Baraiya A.K., Thermal and elastic properties of thorium pnictides under high pressure; Phase Transitions, 83 (2010) 404-418.
- Mori S. and Hiki Y., Calculation of the third- and fourthorder elastic constants of alkali halide crystals, J. Phys. Soc. Jpn., 45 (1975) 1449-1454.
- Leibfried G. and Hahn H., Zur temperatur abhängigkeitder elastischen konstanten von alkalihalogenidkristallen, Z. Phys., 150 (1958) 497-525.
- Singh D., Mishra G., Rajkumar and Yadav R.R., Temperature dependence of elastic and ultrasonic properties of sodium borohydride, Commun. Phys., 27 (2017) 151-164.
- Akhiezer A., On the Absorption of sound in solids, J.Phys. (USSR) 1 (1939)277-287.
- Bommel H.E. and Dransfeld K., Excitation and attenuation of hypersonic waves in quartz, Phys. Rev., 117 (1960) 1245-1252.
- Woodruff T.O. and Ehrenreich H., Absorption of sound in insulators, Phys. Rev., 123 (1961) 1553-1559.
- Mason W.P. and Bateman T.B., Relation between Third?order elastic moduli and the thermal attenuation of ultrasonic waves in nonconducting and metallic crystals, J. Acoust. Soc. Am. 40 (1966) 852-862.
- Kumar A., Singh D., Thakur R.K. and Kumar R., Mechanical and thermophysical properties lutetium monochalcogenides, an ultrasonic study, J. Pure Appl. Ultrason. 39 (2017) 43-48.
- Pandey D.K., Singh D. and Yadav R.R., Ultrasonic wave propagation in IIIrd group nitrides, Appl. Acoust., 68 (2007) 766-777.
- Singh D., Behaviour of acoustic attenuation in rare-earth chalcogenides, Mat. Chem. Phys., 115 (2009) 65-68.
- Singh D., Tripathi S., Pandey D.K., Gupta A.K., Singh D.K. and Kumar J., Ultrasonic wave propagation in semimetallic single crystals, Mod. Phys. Lett. B, 31 (2011) 2377-2390.
- Ultrasonic Attenuation in Yttrium Monochalcogenides
Abstract Views :187 |
PDF Views:1
Authors
Affiliations
1 USICT, Guru Gobind Singh Indraprastha University, Sector 16C, Dwarka , New Delhi-110078, IN
2 Amity Institute of Applied Sciences, Amity University, Noida-201313, IN
3 State Council of Educational Research & Training Haryana, Gurugram-122 001, IN
4 Amity School of Engineering and Technology, Delhi, Noida-201313, IN
5 Amity Institute of Nanotechnology, Amity University, Noida-201313, IN
6 Department of Physics, P.P.N. (P.G.) College, Kanpur-208001, IN
1 USICT, Guru Gobind Singh Indraprastha University, Sector 16C, Dwarka , New Delhi-110078, IN
2 Amity Institute of Applied Sciences, Amity University, Noida-201313, IN
3 State Council of Educational Research & Training Haryana, Gurugram-122 001, IN
4 Amity School of Engineering and Technology, Delhi, Noida-201313, IN
5 Amity Institute of Nanotechnology, Amity University, Noida-201313, IN
6 Department of Physics, P.P.N. (P.G.) College, Kanpur-208001, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 40, No 4 (2018), Pagination: 93-99Abstract
The present paper reports ultrasonic properties of yttrium chalcogenides (YCh: Ch=S, Se and Te) along <110> direction in the temperature region 100-500 K. The Coulomb and Bom-Mayer potential model is applied to compute the higher order elastic constants. These elastic constants are used to utilise for computing ultrasonic velocity, ultrasonic Grüneisen parameters, thermal conductivity and ultrasonic attenuation. Additionally, the second order elastic constants has been applied to evaluate many mechanical properties such as Young modulus, bulk modulus, Cauchy's relation, Zener's anisotropy factor, toughness to fracture ratio for the prediction about the chosen materials. The YCh follow the Born stability criterion, so these materials are mechanical stable. The toughness to fracture is greater than 0.57, so these materials are brittle in nature. The thermal conductivity is also computed by means of Slack and Berman approach. Finally the temperature ultrasonic attenuation due to phonon-phonon interaction and thermo-elastic relaxation mechanisms has been computed along <110> at room temperature. The achieved results for yttrium monochalcogenides are discussed with similar type of materials.
Keywords
Monochalcogenides, Elastic Constants, Ultrasonic Properties, Thermal Properties.Full Text
References
- Vaitheeswaran G., Kanchana V., Svane A., Christensen N. E., Staun Olsen J., Jorgensen J.-E. and Gerward L., High-pressure structural study of yttrium monochalcogenides from experiment and theory, Phys. Rev. B: Condens. Matter. 83 (2011), 184108.
- Shinde S. M., Gupta S., Gupta S. K. and Jha P. R., Lattice dynamics and thermodynamical study of yttrium monochalcogenides, Comput. Mat .Sc. 92 (2014), 69-75.
- Sahoo B.D., Joshi K.D. and Gupta S.C., Pressure effect on elastic, lattice dynamic and superconducting behaviour of yttrium sulfide: A first principle study, J. Appl. Phys. 115 (2014), 123502.
- Maachou A., Aboura H., Amrani B., Khenata R., BinOmran S. and Varshney D., Structural stabilities, elastic and thermodynamic properties of scandium chalcogenides via first-principles calculations, Comput. Mater. Sci. 50 (2011), 3123-3130.
- Seddik T., Khenata R., Bouhemadou A., Guechi N., Sayede A., Varshney D., Al-Douri Y., Reshak A. H. and Bin-Omran S., External temperature and pressure effects on thermodynamic properties and mechanical stability of yttrium chalcogenides YX (X=S, Se and Te), Physica B 428 (2013), 78-88.
- Bhalla V., Singh D. and Jain S.K., Mechanical and thermophysical properties of rare-earth monopnictides, Int. J. Comput. Mater. Sci. Eng. 5 (2016), 1650012 (14pp.).
- Bhalla V. and Singh D., Anisotropic assessment of ultrasonic wave velocity and thermal conductivity in ErX (X: n, As), Indian J. Pure Appl. Phys. 54 (2016), 40-45.
- Roedhammer P., Reichardt W. and Holtzberg F., Soft-mode behavior in the phonon dispersion of YS, Phys. Rev. Lett. 40 (1978), 465-468.
- Hulliger F. and Hull J.G.W., Superconductivity in rocksalt-type compounds, Solid State Commun. 8 (1970), 1379-1382.
- Tutüncü H.M. and Srivastava G.P., Ab-initio investigations of phonon anomalies and superconductivity in the rock-salt YS, Philos. Mag. 87 (2007) 4109-4118 . 11 Steiner M.M., Eschrig H. and Monnier R., Longitudinal-acousticphonon softening in YS, LaS, and CeSe, Phy. Rev. B 45 (1992), 7183-7187.
- Morelli D.T. and Slack G.A., High Thermal Conductivity Materials, Springer, New York, (2006).
- Born M. and Mayer J.E., Zur Gittertheorie der Ionenkristalle, Z. Phys. 75 (1932), 1-18.
- Fumi F.G. and Tosi M.P., Ionic sizes and Born repulsive parameters in the NaCl-type alkali 361 halides-I. J. Phys. Chem. Solids 25 (1964), 31-43.; Tosi M.P. and Fumi F.G., Ionic sizes and Born repulsive parameters in the NaCl-type alkali 359 halides-II, J. Phys. Chem. Solids 25 (1964), 45-52.
- Leibfried G. and Haln H., Zur Temperaturabhangigkeit der Elastischen Konstantaaen von Alhalihalogenidkristallen, Z. Phys. 150 (1958), 497-525.
- Mori S. and Hiki Y., Calculation of the third- and fourth-order elastic constants of alkali halide crystals, J. Phys. Soc. Jpn. 45 (1978), 1449-1456.
- Bhalla V., Singh D. and Jain S.K., Mechanical and thermophysical properties of cerium monopnictides, Int. J. Thermophys. 37 (2016), 33 (17 pp.).
- Langueur H. and Kassali K., Density functional study of the carbon dependence of the structural, mechanic, thermodynamic, and dynamic properties of SiC alloys, Int. J. Thermophys. 38 (2017), 41.
- Singh D., Kaushik S., Pandey S. K., Mishra G. and Bhalla V., Mechanical and thermophysical properties of neptunium monopnictides, VNU J. Sc. Math- Phys. 32 (2016), 43-53.
- Bhalla V., Singh D., Mishra G. and Wan M., Mechanical and thermophysical properties of neptunium monopnictides, J. Pure Appl. Ultrason. 38 (2016) 23-27.
- Singh D., Kaushik S., Tripathi S., Bhalla V. and Gupta A.K., Temperature dependent elastic and ultrasonic properties of berkelium monopnictides, Arab. J. Sci. Eng. 39 (2014), 485-494.
- Mason W.P. and Batemann T.B., Relation between third order elastic moduli and the thermal attenuation of ultrasonic waves in nonconducting and metallic crystals, J. Acoust. Soc. Am. 40, (1966), 852.
- Yadav R.R. and Singh D., Ultrasonic attenuation in lanthanum monochalcogenides, J. Phys. Soc. Jpn. 70 (2001) 1825-1832.
- Singh D., Pandey D. K., Singh D.K. and Yadav R.R., Propagation of ultrasonic waves in neptunium monochalcogenides, Appl. Acoust. 72 (2011), 737-741.
- Bhalla V., Singh D., Mishra G. and Wan M., Mechanical and thermophysical properties of europium mono-chalcogenides, J. Pure Appl. Ultrason. 38 (2016), 23-27.
- Cousin C.S.G., New relations between elastic constants of different orders under central force interactions, J. Phys. C: Solid State Phys. 4 (1971), 1117-1123.
- Hiki Y. and Granato A.V., Anharmonicity in noble metals; higher order elastic constants, Phys. Rev. 144 (1966), 411-419.
- Bhalla V., Kumar R., Tripathy C. and Singh D., Mechanical and thermal properties of praseodymium monopnictides: an ultrasonic study, Int. J. Mod. Phys. B 27 (2013), 1350116 (28 pp.).
- Karki B.B., Ackland G.J. and Crain, Elastic instabilities in crystals from ab-initio stress-strain relations. J. Phys.: Condens. Matter 9 (1997), 8579-8590.
- Kaushik S., Bhalla V. and Singh D., Temperature dependent elastic and ultrasonic properties of silver halide crystals, J. Pure Appl. Ultrason. 36 (2014), 85-90.
- Kumar A., Singh D., Thakur R.K. and Kumar R., Mechanical and thermophysical properties of lutetium mochalcogenides: an ultrasonic study, J. Pure Appl. Ultrasonic. 39 (2007), 43-48.
- Kor S.K., Singh D. and Srivastava A.K., Ultrasonic studies of thulium monochalcogenides, Indian J. Pure Appl. Phys. 43 (2005), 355-358.
- Elastic and Thermo-Acoustic Study of YM Intermetallics
Abstract Views :222 |
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
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: 1-8Abstract
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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- 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.
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- 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.
- Pugh S. F., Relations between the elastic moduli and the plastic properties of polycrystalline pure metals, Philos. Mag. 45 (1954) 823- 843.
- 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 IIIrd 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.
- Estimation of Effective Debye Temperature of Multi Component Liquid Mixtures at 298.15k
Abstract Views :223 |
PDF Views:1
Authors
Affiliations
1 Department of Physics, V.S.S.D. College, Kanpur-208002, IN
2 College of Engineering Science & Technology, Lucknow-226010, IN
3 Department of Chemistry, BITS Pilani, K.K. Birla Goa Campus, Zuarinagar, Goa-403726, IN
4 Amity Institute of Applied Sciences, Amity University, Noida-201313, IN
1 Department of Physics, V.S.S.D. College, Kanpur-208002, IN
2 College of Engineering Science & Technology, Lucknow-226010, IN
3 Department of Chemistry, BITS Pilani, K.K. Birla Goa Campus, Zuarinagar, Goa-403726, IN
4 Amity Institute of Applied Sciences, Amity University, Noida-201313, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 41, No 1 (2019), Pagination: 19-23Abstract
The Debye temperature has been computed for four quaternary mixtures over the entire range of composition at 298.15K. We have applied three different approaches and evaluated the Debye temperature using experimental data of ultrasonic velocity and density. This paper aims to portray the comparison of all the three approaches applied on the four quaternary mixtures which is being done for the first time to the best of authors knowledge .A good agreement is observed among the values computed with all the three approaches.Keywords
Debye Temperature, Quaternary Liquid Mixtures, Ultrasonic Velocities, Density.Full Text
References
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- Pandey J. D., Jain P. and Vyas V., Isothermal compressibility and sound velocity of binary liquid systems: Applications of hard sphere models, Pramana J. Phys. 43 (1994) 361-372.
- Yasmin M., Singh K. P., Parveen S., Gupta M. and Shukla J. P., Thermoacoustical excess properties of binary liquids mixtures- a comparative experimental and theoretical study, Acta Phys. Pol. A 115 (2009) 890-900.
- Singh S., Singh A. and Badal S., Computation of effective Debye temperature of binary liquid mixtures, IJRPC 7(3) (2017), 302-305.
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- Dey R., Mishra R. K., Soni N. K. and Mittal R. C., Effective Debye temperatures of liquid metal alloys and molten salt mixtures, Univ. Alld. Studies (NMS) 2(1) (2003) 15-20.
- Vyas V., Excess molar volumes and densities of multicomponent liquid systems at 298.15K. A comparison with flory's statistical theory, Phys. Chem. Liq., 41 (2003), 55-64.
- Vyas V., Jain P. and Nautiyal T., Excess effective Debye temperature of binary liquid mixtures from sound velocity measurements at 298.15K, Ind. J. Phys. 77B(5) (2003) 533-536.
- Singh R. N., George A.K. and Arafin S., Specific heat ratio, Gruneisen parameter and Debye temperature of crude oil, J. Phys. D. 39 (2006) 1220-1225.
- Vyas V., Ultrasonic investigation of effective Debye Temperature in multi-component liquid systems at 298.15K , Phys. Chem. Liq. 42 (2004) 229-236.
- Pandey J. D., Srivastava T., Chandra P., Dwivedi D. K. and Sanguri V., Estimation of thermodynamic properties of multi component systems on the basis of generalized hole theory, J. Mol. Liq. 157 (2010) 158-161.
- Pandey J. D., Singh A. K. and Dey R., Effect of isotopy on thermoacoustical properties, J. Pure Appl. Ultrason. 26 (2004) 100-104.
- Pandey J. D., Singh A. K. and Dey R., An ultrasonic study of multicomponent liquid systems, Indian J. Chem. Techn. 12 (2005) 598-592.
- Dey R. and Kumar P., A study of thermoacoustical and non-linearty parameters of binary liquid mixtures at different temperatures, Acta Acustica united with Acustica. 99 (2011) 1-3.
- Singh A. K., Thermophysical and thermoacoustical parameters of liquids and liquid mixtures, D.Phil Thesis, Department of Chemistry, University of Allahabad, (2004).
- Eugene S. Domalski and Elizabeth D. Hearing, Journal of Physical and Chemical Reference Data, (1988).
- Elastic, Mechanical and Thermal Properties of Wurtzite BeO Nanowires
Abstract Views :229 |
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Authors
Affiliations
1 University School of Information Communication and Technology, Guru Gobind Singh, Indraprastha University, Dwarka, Delhi-110078, IN
2 Department of Electronics and Communication Engineering, Amity School of Engineering and Technology, Sector-125, Noida-201313, IN
3 Amity Institute of Applied Sciences, Amity University Uttar Pradesh, Noida-201313, IN
1 University School of Information Communication and Technology, Guru Gobind Singh, Indraprastha University, Dwarka, Delhi-110078, IN
2 Department of Electronics and Communication Engineering, Amity School of Engineering and Technology, Sector-125, Noida-201313, IN
3 Amity Institute of Applied Sciences, Amity University Uttar Pradesh, Noida-201313, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 41, No 2 (2019), Pagination: 44-50Abstract
This paper describes the elastic, mechanical, thermal and ultrasonic properties of BeO-nanowires (BeO-NWs) in high temperature regime. The elastic properties of BeO-NWs are computed using Lennard-Jones potential model. Using the higher order elastic constants, the mechanical constants of the material are calculated at room temperature. The Pugh's indicator value confirms the brittle nature of the material. Various ultrasonic parameters such as ultrasonic velocities, Grüneisen parameter, ultrasonic attenuation are obtained with the help of elastic constants and density. In addition, the thermal conductivity of BeO-NWs has also been computed using Morelli and Slack approach. The properties studied in the present investigation are discussed and compared with the previous theoretical and experimental results on NWs.Keywords
Elastic Constant, Nanowire, Thermal Conductivity, Ultrasonic Property.Full Text
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- Ultrasonic Attenuation in Intermetallics HfX(X=Os, Ir and Pt)
Abstract Views :214 |
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Authors
Affiliations
1 University School of Information, Communication and Technology, Guru Gobind Singh Indraprastha University, Dwarka Sector 16C, New Delhi-110078, IN
2 Department of Physics, Professor Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study & Research, Veer Bahadur Singh Purvanchal University, Jaunpur-222003, U.P., IN
3 Department of Physics, Bappa Sri Narain Vocational P.G. College (KKV), Charbagh, Lucknow-226001, U.P., IN
4 Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida-201313, U.P., IN
1 University School of Information, Communication and Technology, Guru Gobind Singh Indraprastha University, Dwarka Sector 16C, New Delhi-110078, IN
2 Department of Physics, Professor Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study & Research, Veer Bahadur Singh Purvanchal University, Jaunpur-222003, U.P., IN
3 Department of Physics, Bappa Sri Narain Vocational P.G. College (KKV), Charbagh, Lucknow-226001, U.P., IN
4 Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida-201313, U.P., IN
Source
Journal of Pure and Applied Ultrasonics, Vol 42, No 2 (2020), Pagination: 46-51Abstract
Ultrasonic study of B2 -structured hafnium based compounds HfX(X=Os, Ir and Pt) along direction were evaluated at room temperature. Initially, the Coulomb and Born-Mayer potential model was used to find out the higher order elastic constants of HfX at room temperature. We have used the second order elastic constants (SOECs) to compute the mechanical properties such as bulk modulus, Young's modulus, shear modulus, Pugh's ratio, Poisson's ratio, Zener anisotropic factor, Vicker's hardness, Lame's modulus of chosen materials. Further, the SOECs and third order elastic constants (TOECs) were applied to compute ultrasonic velocities and Debye temperature. The thermal conductivity and thermal relaxation time of chosen monopnictides compounds have also been computed at room temperature. We have found that HfOs is strongest and most fit material for crystallographic study in B2 phase. In addition to above evaluated parameters, energy density, specific heat per unit volume, thermal conductivity, acoustic coupling constants and ultrasonic attenuation for longitudinal and shear modes propagation along direction have been estimated. The ultrasonic attenuation was least in case of HfOs. Obtained results have been discussed and justified with available findings for their future prospects.Keywords
Elastic Constants, Mechanical Properties, Thermal Conductivity, Ultrasonic Attenuation.Full Text
References
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- Singh D., Tripathy C., Paikaray R., Mathur A.and Wadhwa S.,Behaviour of ultrasonic properties on SnAs, InTe and PbSb. Eng. Appl. Sci. Res., 46(2019) 98-105.
- Pandey D.K.and Yadav C.P.,Thermophysical and ultrasonic properties of GdCu under the effect of temperature and pressure, Phase Trans., 93(2020) 338-349.
- Yadav C.P., Pandey D.K.and Singh D.,Elastic and ultrasonic studies on RM (R = Tb, Dy, Ho, Er, Tm; M = Zn, Cu) compounds, Z. Naturforsch. A 74(2019) 1123-1130.
- Elastic and Ultrasonic Properties of Cadmium Oxide
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Authors
Affiliations
1 University School of Information & Communication Technology, Guru Gobind Singh Indraprastha University, New Delhi-110 078, IN
2 Amity School of Engineering & Technology Delhi, A.U.U.P. Premises, Noida-201 313, IN
3 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, Veer Bahadur Singh Purvanchal University, Jaunpur-222 003, IN
4 Department of Physics, P.P.N. (P.G.) College, Kanpur-208 001, IN
1 University School of Information & Communication Technology, Guru Gobind Singh Indraprastha University, New Delhi-110 078, IN
2 Amity School of Engineering & Technology Delhi, A.U.U.P. Premises, Noida-201 313, IN
3 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, Veer Bahadur Singh Purvanchal University, Jaunpur-222 003, IN
4 Department of Physics, P.P.N. (P.G.) College, Kanpur-208 001, IN
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Journal of Pure and Applied Ultrasonics, Vol 42, No 3 (2020), Pagination: 78-80Abstract
The attenuation of ultrasonic waves has been estimated in rocksalt type (B1) and CsCl type (B2) structures of CdO at room temperature along , and directions. First of all, the higher order elastic constants have been computed using Born model with Mori and Hiki approach. Then, the second order elastic constants (SOECs) were applied to compute the mechanical constants such as shear modulus, Young's modulus, bulk modulus, tetragonal modulus, Poisson's ratio, Pugh's indicator for finding performance of CdO. Numerous physical quantities, such as ultrasonic velocity, Debye temperature, thermal conductivity, ultrasonic Gruneisen parameter and acoustic coupling constants have been determined for the chosen material. Finally, the attenuation of ultrasonic waves has been compared in B1 and B2 phases of CdO and discussed in correlation with available findings.Keywords
Cadmium Oxide, Elastic Constants, Thermal Properties, Ultrasonic Properties.Full Text
References
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- Moreno R.J.G. and Takeuchi N., First principles calculations of the ground-state properties and struc-tural phase transformation in CdO. Phys. Rev. B 66 (2002) 205205.
- Dou Y., Egdell R.G., Law D.S.L., Harrison N.M. and Searle B.G., An experimental and theoretical investigation of the electronic structure of CdO. J. Phys. Condens. Matter. 38 (1998) 8447.
- Piper L.F.J., DeMasi A., Smith K.E., Schleife A., Fuchs F., Bechstedt F., Zuniga-Pérez J. and Munoz-Sanjosé V., Electronic structure of single-crystal rocksaltCdO studied by soft x-ray spectroscopies and ab initio calculations. Phys. Rev. B 77 (2008) 125204.
- Bhalla V., Kumar R., Tripathy C. and Singh D., Mechanical and thermal properties of praseodymium monopnictides: an ultrasonic study. Int. J. Mod. Phys. B 27 (2013) 1350116.
- Jyoti B., Singh S.P., Gupta M., Tripathi S., Singh D. and Yadav R.R., Investigation of zirconium nanowire by elastic, thermal and ultrasonic analysis, Z. Naturforsch. 2020 (Article in Press), doi: 10.1515/zna-2020-0167.
- Mori S. and Hiki Y., Calculation of the third-and fourth-order elastic constants of alkali halide crystals. J. Phys. Soc. Jpn. 45 (1975) 1449-1456.
- Singh D. and Pandey D.K., Ultrasonic investigations in intermetallics. Indian Acad. Sci. 72 (2009) 389-398.
- Ultrasonic Characterization of Intermetallic Compounds
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Authors
Affiliations
1 Department of Physics B.S.N.V.P.G. College, Charbagh, Lucknow-226 001,, IN
2 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, Veer Bahadur Singh Purvanchal University, Jaunpur-222 003,, IN
1 Department of Physics B.S.N.V.P.G. College, Charbagh, Lucknow-226 001,, IN
2 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, Veer Bahadur Singh Purvanchal University, Jaunpur-222 003,, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 43, No 3-4 (2021), Pagination: 56-60Abstract
A simple interaction potential model has been established to calculate the higher order elastic constants of the intermetallic compounds NdS, NdSe, NdTe in the temperature range from 100-500 K. The ultrasonic velocity, Debye average velocity, thermal relaxation time and acoustic coupling constant are calculated using the higher order elastic constants and other related parameters. Ultrasonic attenuation due to phonon-phonon interaction and thermoelastic loss are studied as a function of temperature along <111> direction. Important characteristic features well connected to the acoustical parameters are discussed.Keywords
Ultrasonic Propagation, Elastic Constants, IntermetallicsFull Text
References
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- Asian J. Chem., 24 (2012) 5652-5654.
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- Verma A. K., Kaushik S., Singh D. and Yadav R. R., Elastic and thermal properties of carbides of U, Pu, and Am, J. Phys. Chem. Solids 133 (2019) 21-27.
- Bhalla V., Singh D. and Jain S. K., Mechanical and thermophysical properties of rare-earth monopnictides, Int. J. Comput. Mater. Sci. Eng. 05 (2016) 1650012.
- Investigation of temperature dependent mechanical, thermophysical and ultrasonic properties of ScZrHf ternary alloy
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Authors
Affiliations
1 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research,Veer Bahadur Singh Purvanchal University, Jaunpur-222001, Uttar Pradesh India., IN
1 Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research,Veer Bahadur Singh Purvanchal University, Jaunpur-222001, Uttar Pradesh India., IN
Source
Journal of Pure and Applied Ultrasonics, Vol 44, No 3-4 (2022), Pagination: 79-85Abstract
In 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.Keywords
Refractory Medium-Entropy Alloys, Hexagonal Closed-Packed, Ultrasonic Behaviour, Rare-Earth, Transition Metal.Full Text
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