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In the present work temperature dependent ultrasonic attenuation and other elastic properties of actinide carbides (UC, PuC and AmC) have been found out along <100>, <110> and <111> orientations for longitudinal and shear modes of propagation. In the recent years actinide carbides have got interests due to their potential applications in nuclear fuels and propulsion reactors etc. Lattice constant and hardness parameter have been taken as initial parameters to calculate second order and third order lattice constants upto second nearest neighbor using Born-Mayer potential model. These higher order constants have been used for further computation of orientation dependent ultrasonic velocity, microhardness, Breazeale’s non-linearly parameter, thermal conductivity and thermal relaxation time. The second and third order elastic constants have also been used to compute mechanical constants like Young’s modulus, bulk modulus, shear modulus, tetragonal modulus, Poisson’s ratio, Zener anisotropy factor and Pugh’s indicator. On the basis of these we confirm that these carbides are stable and possessing brittle nature. Comparative study of different carbides compounds has been done for their classification and evaluation of ultrasonic properties. The present analysis highlights the significance of the study for nondestructive materials characterizations and their industrial applications.
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