Pressure Dependence of Elastic Constants and Debye Temperature for Zr50.5Ti4.8Cu19.0Ni11.4Al14.3 Bulk Metallic Glass

2002 ◽  
Vol 17 (7) ◽  
pp. 1785-1788 ◽  
Author(s):  
Ping Wen ◽  
Ru Ju Wang ◽  
Wei Hua Wang
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Elastic Constants ◽  
Pressure Dependence ◽  
High Resolution Electron Microscopy ◽  
Resolution Electron ◽  
Homogeneous Composition ◽  
Overlap Method ◽  
Pulse Echo ◽  
Isothermal Equation

The microstructure of Zr50.5Ti4.8Cu19.0Ni11.4Al14.3 bulk metallic glass (BMG) was investigated by high-resolution electron microscopy. The microstructure of the BMG is of homogeneous composition and short-range ordered microstructure. Using an ultrasonic technique with the pulse echo overlap method, the pressure-dependent acoustic velocities of the BMG have been measured up to 0.5 GPa. The elastic constants and their pressure dependence have been obtained. The isothermal equation of state (EOS) of the BMG is determined in terms of the Murnaghan form. With the results of the elastic constants and the EOS for those of its metallic components, the atomic configuration of the BMG is discussed.

Elastic constants and their pressure dependence of Zr41Ti14Cu12.5Ni9Be22.5C1 bulk metallic glass

1999 ◽  
Vol 74 (13) ◽  
pp. 1803-1805 ◽  
Author(s):  
Wei-Hua Wang ◽  
R. J. Wang ◽  
F. Y. Li ◽  
D. Q. Zhao ◽  
M. X. Pan
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Elastic Constants ◽  
Pressure Dependence

scholarly journals Stability of ZrTiCuNiBe Bulk Metallic Glass upon Isothermal Annealing Near the Glass Transition Temperature

2002 ◽  
Vol 17 (6) ◽  
pp. 1385-1389 ◽  
Author(s):  
Wei Hua Wang ◽  
Ru Ju Wang ◽  
W. T. Yang ◽  
B. C. Wei ◽  
P. Wen ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Isothermal Annealing ◽  
Scanning Calorimetry ◽  
The Stability ◽  
Property Changes ◽  
Overlap Method

The stability of Zr41Ti14Cu12.5Ni10Be22.5 bulk metallic glass (BMG) upon isothermal annealing near the glass transition temperature has been investigated by using x-ray diffraction, differential scanning calorimetry, and the pulse echo overlap method. The density, elastic constants, and thermodynamic parameters as well as their annealing time dependence have been determined. The microstructural and properties changes of the annealed BMG were checked by acoustic measurement. Obvious structural and property changes were observed with prolonged annealing of the BMG near the glass transition temperature.

Collective modes and elastic constants of Pd[sub 39]Ni[sub 10]Cu[sub 30]P[sub 21] bulk metallic glass

2013 ◽  
Author(s):  
Prakruti Chaudhari ◽  
A. Y. Vahora ◽  
B. Y. Thakore ◽  
M. V. Vaghela ◽  
A. R. Jani
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Elastic Constants ◽  
Collective Modes

Anharmonic model for the elastic constants of bulk metallic glass across the glass transition

2018 ◽  
Vol 97 (1) ◽  
Author(s):  
Zachary H. Aitken ◽  
Mehdi Jafary-Zadeh ◽  
John J. Lewandowski ◽  
Yong-Wei Zhang
Keyword(s):  
Glass Transition ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Elastic Constants

Study of Collective Modes and Elastic Constants of Zr57Ti5Cu20Ni8Al10 Bulk Metallic Glass

2013 ◽  
Vol 209 ◽  
pp. 62-65
Author(s):  
Brijmohan Y. Thakore ◽  
P.H. Suthar ◽  
Chaudhari Prakruti ◽  
P.N. Gajjar ◽  
A.R. Jani
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Elastic Constants ◽  
Interatomic Potential ◽  
Model Potential ◽  
Collective Modes ◽  
Many Body ◽  
Phonon Modes ◽  
Long Wavelength ◽  
Local Field Correction

The methodical expressions for the phonon frequencies of Zr57Ti5Cu20Ni8Al10 bulk metallic glass (BMG) both for longitudinal and transverse phonon modes are computed for the first time using Hubbard-Beeby (HB) approach and our well recognized model potential. The self-consistent phonon scheme given by Takeno-Goda, involving multiple scattering and phonon Eigen frequencies expressed in terms of many-body correlation functions of atoms as well as of interatomic potential in the solids, has been used to generate the collective modes in the Zr57Ti5Cu20Ni8Al10 BMG. In the present paper, the local field correction functions due to Hartree (H), Farid et al (F), Sarkar et al (S) and Hubbard Sham (HS) are used to examine the influence of screening effects on the vibrational properties. Further, from the long wavelength limit of phonon frequencies, various elastic constants have been calculated and are found to be in good agreement with experimental and other available data.

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