Ultrasonic properties of Cu 45Zr (45-x)Hf xAg 10 glassy alloys

Mikio Fukuhara, Fei Jia, Wei Zhang, Akihisa Inoue

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14 Citations (Scopus)

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 languageEnglish
Pages (from-to)3685-3691
Number of pages7
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume203
Issue number15
DOIs
Publication statusPublished - 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

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