Abstract
Using ultrasonics, the acoustic characteristics of Cu 45Zr (45-x)Hf xAg 10 (x = 0-25) glassy alloys were examined in terms of complex elasticity. The values of bulk modulus (K), Lamè parameter (λ), Young's (E) and shear (G) moduli of Cu 45Zr (45-x)Hf xAg 10 glassy alloys are found to have a unique order for metallic materials, except for polymers. The large Poisson ratio (∼0.421) and the lower G/K ratio (∼0.167) at 25 at% Hf indicate rubbery characteristics that readily undergo uniaxial volume-preserving deformation but resist three-dimensional nonvolume-preserving deformation. The complex dynamic viscosity shows that visco-elasticity of the glassy alloys is dominated by shear motion. The large peaks in K and λ, and small ones in E and G at 5 at% Hf, and one large peak in the shear attenuation coefficient at 2.5 at% Hf, may indicate atomic morphological change by electron-transverse phonon coupling.
Original language | English |
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Pages (from-to) | 3685-3691 |
Number of pages | 7 |
Journal | Physica Status Solidi (A) Applications and Materials Science |
Volume | 203 |
Issue number | 15 |
DOIs | |
Publication status | Published - 2006 Dec 1 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering
- Materials Chemistry