Behaviour of Acoustical Phonons in Metals in Low Temperature Region

Kor, S. K.; Kailash,; Shanker, Kiran; Mehrotra, Poonam

doi:10.1143/jpsj.56.2428

Cited by 7 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is due to low values of thermal conductivity and higher values of Debye average velocities of the wave along all the three propagating directions. There is positive temperature dependence of the ultrasonic attenuation at high temperatures as in other metals [36,37]. This positive temperature dependence of ultrasonic absorption is due to the fact that p-p interaction occurs at high temperatures mainly at room temperature.…”

Section: Resultsmentioning

confidence: 92%

Sensitivity of Nanostructured Iron Metal on Ultrasonic Properties

Gupta¹,

Gupta²,

Singh³

et al. 2011

OJMetal

View full text Add to dashboard Cite

The present investigation is focused on the influence of the nanocrystalline structure of pure iron metal on the ultrasonic properties in the temperature range 100-300 K. The ultrasonic attenuation due to phononphonon interaction and thermoelastic relaxation phenomena has been evaluated for longitudinal and shear waves along <100>, <110> and <111> crystallographic directions. The second-and third-order elastic constants, ultrasonic velocities, thermal relaxation, anisotropy and acoustic coupling constants were also computed for the evaluation of ultrasonic attenuation in this temperature scale. The direction <111> is most appropriate to study longitudinal sound waves, while <100>, <110> direction are best to propagate shear waves due to lowest values of attenuation in these directions. Other physical properties correlated with obtained results have been discussed.

show abstract

Section: Resultsmentioning

confidence: 92%

Sensitivity of Nanostructured Iron Metal on Ultrasonic Properties

Gupta¹,

Gupta²,

Singh³

et al. 2011

OJMetal

View full text Add to dashboard Cite

show abstract

“…Temperature variation of SOEM and TOEM has been obtained by adding a vibrational contribution to elastic constants. According to lattice dynamics developed by Leibried et al [22] and Ludwig et al [23], temperature variation of SOEM and TOEM has been obtained by adding a vibrational contribution to elastic constants, using the theories tested by us for evaluating acoustical dissipation for other fcc and bcc structured compounds [10][11][12][13]. SOEM and TOEM at any temperature are obtained by adding corresponding vibrational contributions to SOEM and TOEM at absolute zero, namely C 0 i j and C 0 i jk , i.e.…”

Section: Elastic Constantsmentioning

confidence: 99%

“…The phonon-phonon interaction is the dominant cause of ultrasonic attenuation at room temperature and above in all types of solids, i.e. metallic, semiconducting and dielectrics [10][11][12][13]. Attenuation due to thermoelastic loss is negligible compared to total attenuation.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic attenuation due to phonon–phonon interaction, thermoelastic loss and dislocation damping in transition metal carbides

Singh

et al. 2008

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Temperature dependent ultrasonic attenuation due to phonon-phonon (p-p) interaction, thermoelastic loss and dislocation damping due to screw and edge dislocations have been investigated in fcc (NaCl B1 type) structured group IVb and Vb monocarbides (transition metal carbides, namely TiC, ZrC, HfC, VC, NbC and TaC) in the temperature range 50-500 K, along the three crystallographic directions of propagation, namely [100], [110] and [111] for longitudinal and shear modes of propagation. The second-and third-order elastic moduli (SOEM and TOEM) obtained at different temperatures using the electrostatic and Born repulsive potentials and taking interactions up to next-nearest neighbours, have been used to obtain Gruneisen numbers, acoustic coupling constants and their ratios along different directions of propagation and polarization for longitudinal and shear modes of wave propagation. Temperature variation of the phonon relaxation time shows exponential decay. The results have been discussed and compared with available data.

show abstract

Temperature Dependence of Damping of Elastic Waves in Dielectric Alloys

Kailash¹

1987

Ultrasonics International 87

View full text Add to dashboard Cite

Behaviour of Acoustical Phonons in Metals in Low Temperature Region

Cited by 7 publications

References 25 publications

Sensitivity of Nanostructured Iron Metal on Ultrasonic Properties

Sensitivity of Nanostructured Iron Metal on Ultrasonic Properties

Ultrasonic attenuation due to phonon–phonon interaction, thermoelastic loss and dislocation damping in transition metal carbides

Temperature Dependence of Damping of Elastic Waves in Dielectric Alloys

Contact Info

Product

Resources

About