Behaviour of ultrasonic properties on SnAs, InTe and PbSb
n present investigation, we studied the elastic, ultrasonic and thermal properties of SnAs, InTe and PbSb. The Coulomb and Born-Mayer potential model was utilized to compute the second and third order elastic constants up to second nearest neighbor. The direction dependent ultrasonic velocities...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Khon Kaen University
2019-06-01
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| Series: | Engineering and Applied Science Research |
| Subjects: | |
| Online Access: | https://www.tci-thaijo.org/index.php/easr/article/view/149473/135498 |
| Summary: | n present investigation, we studied the elastic, ultrasonic and thermal properties of SnAs, InTe and PbSb. The Coulomb and Born-Mayer potential model was utilized to compute the second and third order elastic constants up to second nearest neighbor. The direction dependent ultrasonic velocities for longitudinal and shear waves, Debye average velocity and mechanical constants such as bulkmodulus, shearmodulus, tetragonalmodulus, Young’smodulus, Poisson ratio, Pugh’s indicator (shear modulusto bulk modulusratio) and Zener anisotropy ratio wereobtained with the use of the second order elastic constants and the density of the chosen materials.Since the Pugh’s indicator is greater than 0.59 for all chosen materials, they have a brittle nature. Further the second and third order elastic constants with other associated acoustical parameters were used to computethe Debye temperature, thermal relaxation time, acoustic coupling constant and ultrasonic attenuation. The total ultrasonic attenuation is thesmallest inthecase of InTe alongthe<100> direction and highest for SnAs alongthe<111> direction. Thermo-elasticloss is insignificantin comparison totheloss due tothephonon-phonon interaction mechanism.Additionally,the thermal conductivity of these materials wasfound using Cahill’s approach. The results of this investigation arediscussed with the availablefindings and forother rock salt structured materials. |
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| ISSN: | 2539-6161 2539-6218 |