Low-temperature dependence of elastic moduli and internal friction for glassy Pd42.5Ni7.5Cu30P20

M. Fukuhara, T. Wada, A. Inoue, F. Yin

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Longitudinal and transverse wave velocities, eight kinds of elastic parameters, and the dilational and shear internal friction of Pd42.5Cu30Ni7.5P20 glassy alloy have been simultaneously measured as a function of temperature in the range from 77 to 373 K, using an ultrasonic pulse method. Monotonic decreases in the Young and shear moduli and in the Debye temperature in the range above 77 K are interpreted in terms of thermal relaxation of squeezed free volumes, accompanied by an increase in the interatomic distances, the appearance of entropy elasticity, and a uniaxial volume-preserving deformation. A 272-K valley of dilational friction seems to correspond to a topological change associated with electron-phonon coupling caused by the release of strains.

Original languageEnglish
Pages (from-to)335-342
Number of pages8
JournalPhilosophical Magazine Letters
Volume88
Issue number5
DOIs
Publication statusPublished - 2008 May

Keywords

  • Elastic modulus
  • Elasticity
  • Glassy alloy
  • Internal friction
  • Low temperature
  • Metallic glasses
  • Ultrasonics

ASJC Scopus subject areas

  • Condensed Matter Physics

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