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Kumar, Amit
- Mechanical and Thermophysical Properties of Lutetium Monochalcogenides:An Ultrasonic Study
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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.References
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- Ultrasonic Attenuation in Thorium Monopnictides
Abstract Views :190 |
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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.References
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- 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.
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