Journal of Pure and Applied Ultrasonics

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Ultrasonic Attenuation in Intermetallics HfX(X=Os, Ir and Pt)


Affiliations
1 University School of Information, Communication and Technology, Guru Gobind Singh Indraprastha University, Dwarka Sector 16C, New Delhi-110078, India
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., India
3 Department of Physics, Bappa Sri Narain Vocational P.G. College (KKV), Charbagh, Lucknow-226001, U.P., India
4 Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida-201313, U.P., India
 

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.
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  • Ultrasonic Attenuation in Intermetallics HfX(X=Os, Ir and Pt)

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Authors

Jyoti Bala
University School of Information, Communication and Technology, Guru Gobind Singh Indraprastha University, Dwarka Sector 16C, New Delhi-110078, India
Devraj Singh
Department of Physics, Professor Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study & Research, Veer Bahadur Singh Purvanchal University, Jaunpur-222003, U.P., India
Arvind Kumar Tiwari
Department of Physics, Bappa Sri Narain Vocational P.G. College (KKV), Charbagh, Lucknow-226001, U.P., India
Shikha Wadhwa
Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida-201313, U.P., India
Ashish Mathur
Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida-201313, U.P., India

Abstract


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.

References