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Low temperature dependence of elastic moduli and internal friction for the glassy alloy Zr 55 Cu 30 Al 10 Ni 5
Author(s) -
Fukuhara Mikio,
Wang Xinmin,
Inoue Akihisa,
Yin Fuxing
Publication year - 2007
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200701195
Subject(s) - anisotropy , internal friction , materials science , alloy , shear modulus , condensed matter physics , thermodynamics , atmospheric temperature range , shear (geology) , elasticity (physics) , amorphous metal , thermal , elastic modulus , glass transition , poisson's ratio , relaxation (psychology) , poisson distribution , composite material , physics , optics , statistics , mathematics , psychology , social psychology , polymer
Longitudinal and transverse wave velocities, eight kinds of elastic parameters, and dilational and shear internal frictions of Zr 55 Cu 30 Al 10 Ni 5 glassy alloy were simultaneously measured as a function of temperature in the range from 77 to 373 K, using an ultrasonic pulse method. The inflections at around 150 K for wave velocities, anisotropy factor and Poisson's ratio, and the 150 K peak of shear friction seem to correspond to one topological change (pseudo‐transition) associated with an interatomic readjustment or vacancy rearrangements. The behaviors from 77 to 125 K and 125 to 373 K are due to thermal relaxation of squeezed free volumes and entropy elasticity associated with vibrational motions of clusters, respectively, accompanied by an increase in atomic distance. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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