Ultrasonic study of fission products precipitated in the nuclear fuel

Yadav, Anil Kumar; Yadav, Raja Ram; Pandey, Dharmendra Kumar; Singh, Devraj

doi:10.1016/j.matlet.2008.02.036

Cited by 21 publications

(30 citation statements)

References 16 publications

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“…Anomalous behaviour of angle dependent velocities is correlated to the behaviour of second order elastic constants. The nature of the angle dependent velocity curves in the present work is the same as the nature of angle dependent velocity curve for others hexagonal wurtzite structured materials [13,[15][16][17][18]. Thus our angle dependency of the velocities for these nanocrystalline wurtzite structured alloys is justified.…”

Section: Discussionsupporting

confidence: 61%

“…Hence applied theory for the evaluation of higher order elastic constants at room temperature is justified. All the SOEC and TOEC for these alloys are found to be higher than those of Mo-Ru-Rh-Pd alloys [13]. It can be also seen from Table 1, that the SOEC and TOEC are found to be increasing from alloys: 1-6 due to large grain size of hcp Co metals.…”

Section: Discussionmentioning

confidence: 67%

“…Eqs. (1)- (2) leads six second and ten third order elastic constants (SOEC and TOEC) for the hexagonal closed packed structured materials [13]. …”

Section: Higher Order Elastic Constantsmentioning

confidence: 99%

“…The anisotropic behaviour of the material can be understood with the knowledge of ultrasonic velocity because the velocity is related to the second order elastic constants [13]. On the basis of mode of atomic vibration, there are three types of velocities (longitudinal, quasi shear and shear) in acoustical region [14].…”

Section: Ultrasonic Velocitymentioning

confidence: 99%

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Acoustic Wave Propagation in Nanocrystalline RuCo Alloys

Yadawa¹,

Singh²,

Pandey³

et al. 2011

AMPC

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The ultrasonic properties like elastic constant, ultrasonic velocity in the hexagonal structured nanocrystalline RuCo alloys have been studied along unique axis at room temperature. The second and third order elastic constants (SOEC & TOEC) have been calculated for these alloys using Lennard-Jones potential. The orientation dependent ultrasonic velocity has been also evaluated to study the anisotropic behaviour of these alloys. The velocities V L and V S1 have minima and maxima, respectively at 45° with unique axis of the crystal, while V S2 increases with the angle from unique axis. The inconsistent behaviour of angle-dependent velocities is associated to the action of second order elastic constants. Debye average ultrasonic velocities of these alloys are increasing with the angle and has maximum at 55° with unique axis at room temperature. Hence, when a ultrasonic wave travels at 55° with unique axis of these alloys, then the average ultrasonic velocity is found to be maximum. Elastic constants and density are mainly the affecting factor for anomalous behaviour of ultrasonic velocity in these alloys. The mechanical and ultrasonic properties of Co 0.75 Ru 0.25 alloy will be better than the other compounds due to their high SOEC, ultrasonic velocity and low ultrasonic attenuation. Co 0.75 Ru 0.25 alloy is more suitable for industrial and other uses, as it has the highest elastic constants and lowest ultrasonic attenuation in comparison to other of these alloys. The results of this investigation are discussed in correlation with other known thermophysical properties.

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Section: Discussionsupporting

confidence: 61%

Section: Discussionmentioning

confidence: 67%

“…Eqs. (1)- (2) leads six second and ten third order elastic constants (SOEC and TOEC) for the hexagonal closed packed structured materials [13]. …”

Section: Higher Order Elastic Constantsmentioning

confidence: 99%

Section: Ultrasonic Velocitymentioning

confidence: 99%

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Acoustic Wave Propagation in Nanocrystalline RuCo Alloys

Yadawa¹,

Singh²,

Pandey³

et al. 2011

AMPC

Self Cite

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“…6) is a component of a strain tensor. Equations 1 and 2 lead to six second and ten third order elastic constants (SOEC and TOEC) for the hexagonal structure materials [27,30]:…”

Section: Second and Third Order Elastic Constantsmentioning

confidence: 99%

Non-destructive characterization of superionic conductor: lithium nitride

Yadawa¹

2014

Materials Science-Poland

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Higher order elastic constants have been calculated in hexagonally structured superionic conductor Li 3 N at room temperature using the interaction potential model. The temperature variation of the ultrasonic velocities was evaluated along different angles with z axis (unique axis) of the crystal, using the second order elastic constants. The ultrasonic velocity decreased with the temperature along a particular orientation of the unique axis. Temperature variation of the thermal relaxation time and Debye average velocities was also calculated along the same orientation. The temperature dependency of ultrasonic properties was discussed in correlation with elastic, thermal and electrical properties. It has been found that the thermal conductivity is the main contributor to the behavior of ultrasonic attenuation as a function of temperature and the cause responsible for attenuation is phonon-phonon interaction. The mechanical properties of Li 3 N at low temperature are better than at high temperature because at low temperature it has low ultrasonic attenuation. Superionic conductor lithium nitride has many industrial applications, such as those used in portable electronic devices.

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Acoustic wave propagation in Ni3 R (R = Mo, Nb, Ta) compounds

Yadawa¹

2011

Pramana - J Phys

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The ultrasonic properties of the hexagonal closed packed structured Ni 3 Mo, Ni 3 Nb and Ni 3 Ta compounds were studied at room temperature for their characterization. For the investigations of ultrasonic properties, the second-order elastic constants using Lennard-Jones potential were computed. The velocities V 1 and V 2 have minima and maxima respectively at 45 • with the unique axis of the crystal, while V 3 increases with respect to angle with the unique axis of the crystal. The inconsistent behaviour of angle-dependent velocities is associated with the action of second-order elastic constants. Debye average sound velocities of these compounds increase with the angle and has maximum at 55 • with the unique axis at room temperature. Hence, when a sound wave travels at 55 • with the unique axis of these materials, the average sound velocity is found to be maximum. The results achieved are discussed and compared with the available experimental and theoretical results.

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Ultrasonic study of fission products precipitated in the nuclear fuel

Cited by 21 publications

References 16 publications

Acoustic Wave Propagation in Nanocrystalline RuCo Alloys

Acoustic Wave Propagation in Nanocrystalline RuCo Alloys

Non-destructive characterization of superionic conductor: lithium nitride

Acoustic wave propagation in Ni3 R (R = Mo, Nb, Ta) compounds

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