Journal of Pure and Applied Ultrasonics

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Elastic and Acoustic Properties of Hexagonal Intermetallic Ternary Compound


Affiliations
1 Department of Applied Physics, Amity School of Engineering and Technology, Bijwasan, New Delhi-110 061, India
 

The elastic, acoustic and mechanical properties of the hexagonal AlB2-type intermetallic NdCuGe ternary compound have been studied along unique axis at room temperature. The second- and third order elastic constants have been calculated for NdCuGe compound using Lennard-Jones potential model. The temperature variation of the ultrasonic velocities is evaluated along different angles with unique axis of the crystal using the second order elastic constants. Temperature variation of the thermal relaxation time and Debye average velocities is also calculated along the same orientation. The temperature dependency of the acoustic properties is discussed in correlation with elastic, thermal and electrical properties. It has been found that the thermal conductivity is the main contributor to the behaviour of ultrasonic attenuation as a function of temperature and the responsible cause of attenuation is phonon-phonon interaction. The mechanical properties of NdCuGe intermetallic compound at low temperature are better than at room temperature, because at low temperature it has low ultrasonic velocity and ultrasonic attenuation.

Keywords

Elastic Properties, Thermal Conductivity, Acoustic Properties, Ternary Intermetallic Compounds.
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  • Villars P., Pearson's Hand book: Crystallographic Data for Intermetallic Phases, Desk Edition, A S M International, Materials Park, OH. (1997).

  • Penc B., Kaczorowski D., Szytula A., Winiarski A. and Zarzycki A., Magnetic properties and electronic structure of R3T4X4 compounds (R = Pr, Nd; T = Cu, Ag; X = Ge, Sn), Intermetallics 15 (2007) 1489-1496.

  • Sebastian C.P., Eckert H., Fehse C., Wright J.P., Attfield J.P., Johrendt D., Rayaprol S., Hoffmann R.D.

  • and Pottgen R., Structural, magnetic, and spectroscopic studies of YAgSn, TmAgSn, and LuAgSn, J. Solid State Chem., 179 (2006) 2376-2385.

  • Baran S., Szytula A., Leciejewicz J., Stusser N., Zygmunt A., Tomkowicz Z. and Guillot M., Magnetic structures of RCuGe (R = Pr, Nd, Tb, Dy, Ho and Er) compounds from neutron diffraction and magnetic measurements, J. Alloys Compd., 243 (1996) 112-119.

  • Yadawa P.K., Ultrasonic characterization of ceramic material titanium diboride, Ceramics-Silikaty, 55(2) (2011) 127-133.

  • Louail L., Maouche D., Roumili A. and Sahraoui F. Ali., Calculation of elastic constants of 4d transition metals, Mater. Lett., 58 (2004) 2975-2979.

  • Yadawa P.K., Elastic and ultrasonic properties of hexagonal niobium nitride compound, J. Adv. Phys. 6(2) (2017) 279-283.

  • Yadawa P.K., Non-destructive characterization of superionic conductor: lithium nitride, Mat. Sc. -Poland 32(4) (2014) 626-632.

  • Pandey D.K., Singh D. and Yadawa P.K., Ultrasonic Study of Osmium and Ruthenium, Platinum Metals Rev. 9(2) (2009) 91-97.

  • Goruganti V., Rathnayaka K.D.D., Joseph H. Ross Jr, Öner Y., Lue C.S. and Kuo Y.K., Transport and magnetic properties of NdCuGe compound, J. Appl. Phys., 103 (2008) 073919.

  • Pandey D.K., Singh D. and Yadav R.R., Ultrasonic wave propagation in IIIrd group nitrides, Appl. Acoust., 68, (2007) 766-777.

  • Born M. and Hang K., Dynamical Theory and Experiments I. Publishers, Berlin (1982).

  • Landolt-Bornstein, Numerical Data and Function Relationship in Science and Technology, Group III, Berlin Springer 11 (1979).


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  • Elastic and Acoustic Properties of Hexagonal Intermetallic Ternary Compound

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Authors

Pramod Kumar Yadawa
Department of Applied Physics, Amity School of Engineering and Technology, Bijwasan, New Delhi-110 061, India

Abstract


The elastic, acoustic and mechanical properties of the hexagonal AlB2-type intermetallic NdCuGe ternary compound have been studied along unique axis at room temperature. The second- and third order elastic constants have been calculated for NdCuGe compound using Lennard-Jones potential model. The temperature variation of the ultrasonic velocities is evaluated along different angles with unique axis of the crystal using the second order elastic constants. Temperature variation of the thermal relaxation time and Debye average velocities is also calculated along the same orientation. The temperature dependency of the acoustic properties is discussed in correlation with elastic, thermal and electrical properties. It has been found that the thermal conductivity is the main contributor to the behaviour of ultrasonic attenuation as a function of temperature and the responsible cause of attenuation is phonon-phonon interaction. The mechanical properties of NdCuGe intermetallic compound at low temperature are better than at room temperature, because at low temperature it has low ultrasonic velocity and ultrasonic attenuation.

Keywords


Elastic Properties, Thermal Conductivity, Acoustic Properties, Ternary Intermetallic Compounds.

References