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Bhalla, Vyoma
- Ultrasonic Attenuation in Terbium Monophosphide
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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
- Temperature Dependent Elastic and Ultrasonic Properties of Silver Halide Crystals
Abstract Views :178 |
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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
- 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
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- 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.
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- 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.
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- 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
Source
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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- 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.
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