Low temperature elastic properties of CuZrTi bulk metallic glass

R. Tarumi; M. Hirao; T. Ichitsubo; E. Matsubara; J. Saida; H. Kato

doi:10.2320/matertrans.MJ200764

Low temperature elastic properties of CuZrTi bulk metallic glass

R. Tarumi, M. Hirao, T. Ichitsubo, E. Matsubara, J. Saida, H. Kato

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Abstract

Temperature dependent elastic constants C_ij(T) of Cu ₆₀Zr₃₀Ti₁₀ bulk metallic glass (BMG) have been studied using MHz frequency range electromagnetic acoustic resonance (EMAR) from 4.5 to 300 K. At ambient temperature, the BMG shows low shear/bulk modulus ratio (or equivalently high Poisson ratio) compared with that of corresponding crystalline state dues to the dense random packed glassy structure. Analysis of C_ij(T) based on the Einstein type lattice vibration model revealed the notable softening in transverse mode acoustic phonons. This unusual vibrational property suggests the existence of liquid like weakly bonded region in the BMG.

Original language	English
Pages (from-to)	1842-1845
Number of pages	4
Journal	Materials Transactions
Volume	48
Issue number	7
DOIs	https://doi.org/10.2320/matertrans.MJ200764
Publication status	Published - 2007 Jul

Keywords

Acoustic phonon
CuZrTi bulk metallic glass
Elastic constants
Ultrasound spectroscopy

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10.2320/matertrans.MJ200764

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title = "Low temperature elastic properties of CuZrTi bulk metallic glass",

abstract = "Temperature dependent elastic constants Cij(T) of Cu 60Zr30Ti10 bulk metallic glass (BMG) have been studied using MHz frequency range electromagnetic acoustic resonance (EMAR) from 4.5 to 300 K. At ambient temperature, the BMG shows low shear/bulk modulus ratio (or equivalently high Poisson ratio) compared with that of corresponding crystalline state dues to the dense random packed glassy structure. Analysis of Cij(T) based on the Einstein type lattice vibration model revealed the notable softening in transverse mode acoustic phonons. This unusual vibrational property suggests the existence of liquid like weakly bonded region in the BMG.",

keywords = "Acoustic phonon, CuZrTi bulk metallic glass, Elastic constants, Ultrasound spectroscopy",

author = "R. Tarumi and M. Hirao and T. Ichitsubo and E. Matsubara and J. Saida and H. Kato",

year = "2007",

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T1 - Low temperature elastic properties of CuZrTi bulk metallic glass

AU - Tarumi, R.

AU - Hirao, M.

AU - Ichitsubo, T.

AU - Matsubara, E.

AU - Saida, J.

AU - Kato, H.

PY - 2007/7

Y1 - 2007/7

N2 - Temperature dependent elastic constants Cij(T) of Cu 60Zr30Ti10 bulk metallic glass (BMG) have been studied using MHz frequency range electromagnetic acoustic resonance (EMAR) from 4.5 to 300 K. At ambient temperature, the BMG shows low shear/bulk modulus ratio (or equivalently high Poisson ratio) compared with that of corresponding crystalline state dues to the dense random packed glassy structure. Analysis of Cij(T) based on the Einstein type lattice vibration model revealed the notable softening in transverse mode acoustic phonons. This unusual vibrational property suggests the existence of liquid like weakly bonded region in the BMG.

AB - Temperature dependent elastic constants Cij(T) of Cu 60Zr30Ti10 bulk metallic glass (BMG) have been studied using MHz frequency range electromagnetic acoustic resonance (EMAR) from 4.5 to 300 K. At ambient temperature, the BMG shows low shear/bulk modulus ratio (or equivalently high Poisson ratio) compared with that of corresponding crystalline state dues to the dense random packed glassy structure. Analysis of Cij(T) based on the Einstein type lattice vibration model revealed the notable softening in transverse mode acoustic phonons. This unusual vibrational property suggests the existence of liquid like weakly bonded region in the BMG.

KW - Acoustic phonon

KW - CuZrTi bulk metallic glass

KW - Elastic constants

KW - Ultrasound spectroscopy

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Low temperature elastic properties of CuZrTi bulk metallic glass

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