Phonon-3He interactions, second-sound absorption and second-sound velocity: An analysis of experimental data

Using ab initio calculations, we have studied the structural and elastic properties of M 2 InC , with M = Sc , Ti , V , Zr , Nb , Hf and Ta . Geometrical optimization of the unit cell is in agreement with the available experimental data. We have observed a quadratic dependence of the lattice parameters versus the applied pressure. The elastic constants are calculated using the static finite strain technique. We derived the bulk and shear moduli, Young's moduli and Poisson's ratio for ideal polycrystalline M 2 InC aggregates. We estimated the Debye temperature of M 2 InC from the average sound velocity. This is the first quantitative theoretical prediction of the elastic properties of Sc 2 InC , Ti 2 InC , V 2 InC , Zr 2 InC , Nb 2 InC , Hf 2 InC and Ta 2 InC compounds, and it still awaits experimental confirmation.

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Apparatus for sound velocity measurements in gases up to 10 kbar: Experimental data for argon

Review of Scientific Instruments ◽

10.1063/1.1137990 ◽

1985 ◽

Vol 56 (6) ◽

pp. 1269-1273 ◽

Cited By ~ 38

Author(s):

P. J. Kortbeek ◽

M. J. P. Muringer ◽

N. J. Trappeniers ◽

S. N. Biswas

Keyword(s):

Experimental Data ◽

Sound Velocity ◽

Velocity Measurements

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Erratum: Second-sound velocity, superfluid density, and universality near the superfluid transition inHe3-He4mixtures

Physical Review A ◽

10.1103/physreva.12.346.2 ◽

1975 ◽

Vol 12 (1) ◽

pp. 346-346

Author(s):

Guenter Ahlers

Keyword(s):

Sound Velocity ◽

Superfluid Density ◽

Superfluid Transition ◽

Second Sound

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Second-sound velocity and superfluid density in3He-4He mixtures near the lambda transition

Journal of Physics C Solid State Physics ◽

10.1088/0022-3719/9/19/011 ◽

1976 ◽

Vol 9 (19) ◽

pp. 3573-3582 ◽

Cited By ~ 1

Author(s):

T Kobayashi ◽

A Tominaga ◽

Y Narahara ◽

F Uehara ◽

T Fushimi

Keyword(s):

Sound Velocity ◽

Superfluid Density ◽

Second Sound ◽

Lambda Transition

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Sound absorption characterization of aluminum foam made by press infiltration casting

Multidiscipline Modeling in Materials and Structures ◽

10.1108/mmms-03-2016-0010 ◽

2016 ◽

Vol 12 (4) ◽

pp. 737-747 ◽

Cited By ~ 6

Author(s):

J.X. Sun ◽

C.Y. Duan ◽

P.S. Liu

Keyword(s):

Experimental Data ◽

Absorption Coefficient ◽

Sound Wave ◽

Sound Absorption ◽

Aluminum Foam ◽

Peak Frequency ◽

Experimental Result ◽

Content Type ◽

Improved Model ◽

Good Agreement

Purpose The purpose of this paper is to investigate the sound absorption by modeling for the aluminum foam produced by press infiltration casting. Design/methodology/approach First use Johnson-Allard-Champoux (JAC) model to calculate the sound absorption coefficient of the present aluminum foam, and then improve it after finding its deviation from the experimental data, so as to get an improved model that could have a good agreement with the experimental result. Findings Using JAC model to calculate the sound absorption coefficient of the present aluminum foam, it is found that the model may have a good agreement with the experimental data only for the sound wave frequency below the absorption peak frequency, but a large deviation from the experimental result for the sound wave frequency above this frequency. Originality/value Improving JAC model by means of two factors, i.e., the absorption peak frequency and the specific surface area, the resultant improved model could be in good agreement with the experimental data.

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